Comparing Junkyard GT40 GT40P Stock E7 Cylinder Heads / Everything U NEED 2 Know - Fox body Mustang

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On this episode, I compare the Stock Foxbody Mustang 5.0 HO E7 cylinder heads to the GT40 "3 Bar" cylinder heads & the GT40P "4 Bar" cylinder heads. The GT40 cylinder heads were first introduced on the 1993 Mustang Cobra and were later used on the 1996 & 1997 Ford Explorer 5.0's and Mercury Mountaineer 5.0's. They were also used on the 1995 Cobra and the first generation Ford Lightening pickup. After 1997, the GT40P cylinder heads were introduced and the vast majority of those cylinder heads were used on the late 90's and early 2000's Ford Explorers and Mercury Mountaineers. in the late 90's and early 2000's, these top end engine parts were plentiful and could be found without too much difficulty at local junkyards throughout North America. These days, the parts are getting harder and harder to find which is actually driving the price of these various GT40 parts up by the day.
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9 июн 2024

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Комментарии : 267

@arkhsm 2 месяца назад

Did you know that my Factory GT40p heads were Factory modified by Ford Australia, with 1.94 intake, 1.54 exhaust valves ! The whole engine was hand built by one man, taking one complete day to assemble, and they also received a set of Yella Terra roller rockers, plus a mild port matching, and custom 70mm throttle body. They also got a factory set of headers, with a complete dual exhaust system. Only late 2001 to early 2002 Falcon XR8 got this 295hp beauty !! The TOP DOG T series version of this engine even has a 3.4 inch stroker crank, making it 342 ci and 335hp !!!

@KASLCustoms 2 месяца назад

No way!? Thats awesome!

@foxfordcatguy2283 Год назад

The GT40 & GT40p also have "GT" or "GTP" cast between the #1 sparkplug (#8 on driver's side) & the end headbolt. The GT40p also has a "P" right above there on the little "ledge" by the corner of the valve cover. Maybe not all, but mine do & these markings are also described in the "Ford High Performance Parts Interchange" book & the "Muscle Mustang & Fast Fords" January '98 issue "Exploring For More" article starting on page #222. The GT40's were used on '96 to mid-'97 Explorers. The GT40p was used from mid-'97 to '01. The GT40p (58-61cc) has a SMALLER combustion chamber than both the E7 (62-65cc) & the GT40 (F1ZE 63-66cc, F3ZE 60-63cc, F4ZE 63-66cc). [This info is also in the previously mentioned book & article.]

@angeljose6261 Год назад

I just picked up some gt's yesterday at a wrecking yard and you're right

@danmallery9142 10 месяцев назад

GT40 heads are the first "aftermarket" heads that I ever bought. I got them for my 71 Bronco back around 92 or 93? Can't remember exactly. I had some mild porting done and added some Harland Sharp roller rockers. Not many other options back then, plus, I wanted to stick with Ford parts. They worked good. No comparison to modern aluminum heads that we have today but those were just a dream back then.

@KASLCustoms 10 месяцев назад

Yessir I agree 👍

@midnight347 Месяц назад

Big dog does some badass porting nowadays that makes these heads flow better than out the box aluminim heads

@frederickhairston3823 Год назад

Just installed gt40p on 1993 fox 5.0 love them ford tough.

@KASLCustoms Год назад

Right on!!

@OurCabinInThewoods 6 месяцев назад

Great info on these heads Thanks. I have a 97 Mountaineer with GT40p heads i installed Torque Monster Headers and Gibson performance exhaust system. I don't have a problem getting to my plugs. Now i did add Spark Plug Wire Boots Heat Shield Protector Sleeves. They have been on the truck for 160K with no problems. I love the torque it has. Thanks for sharing this video.

@KASLCustoms 6 месяцев назад

Very nice! You're welcome!

@NGG1983 Год назад

I suspect that Ford put the GT40 and Gt40p heads on Explorers and Mountaineers simply because they're more efficient and make more power. Remember those trucks got a low rpm torque truck camshaft in them so even with those higher performance parts they make like 205HP. If they had E7 heads and a smaller port intake they would make even less power and customers would likely be unimpressed with the power you'd expect in a V8 option truck. Its a massively heavy all-wheel drive vehicle too so it would simply be underpowered with E7 heads

@randytrivitt6539 Год назад

Absolutely correct the explorers and mountaineers wait around 6800 lb!! Compared to the mustangs 3200 lb!! So of course they're going to put high performance heads on heavier vehicles or at least stock racing vehicles!! Like the mustang cobras and the GTS mustangs!! 100% agree... 💯👍👍🤷🤯🤯🤦😁👍👍🙌

@thacutoff6226 Год назад

All your points are right, however Ford is just cheap they plenty left over from mustangs ……. They just used them out in 96/97 explorers 3 bars (Eddie bauers edition) then they shift to p style

@foxfordcatguy2283 Год назад

@@thacutoff6226 The GT40's only came in Mustang Cobras. They also have dates codes on them showing they were made after the 5.0 was discontinued in the Mustang. The GT40P never came in ANY Mustang.

@thacutoff6226 Год назад

@@foxfordcatguy2283 gt40 3 bar heads came on mustang cobras except that they are on 96/97 ford explorers Eddie bauers and Mercury mountaineers ford used remaining leftover discontinued 5.0 stuff I.e explorer intakes (just basically cobra intakes). Gt40p heads have 4 bars stamped, and are different the main issue is headers/spark plugs

@onescaryapothiconboi7475 Год назад

@@randytrivitt6539 I think I lost brain cells reading your post. These Explorers topped out at 4,200 lbs. Only 1,000 heavier than the SN95.

@MrJak427 Год назад

I’ve driven a few late model falcons in Australia and the explorer 5.0 was heaps more torquey in the low rpm’s compared to the std 5.0 with e7’s so it makes perfect sense to put an engine with more torque into a large heavy SUV they weren’t race car parts just the next evolution of a stock casting

@troyterry8048 Год назад

Loved the information, keep the content coming. Here in Australia I had an AU XR8 falcon with a 302 windsor with factory gt40p heads, factory roller rockers, different cam specifications to the standard 5litre and they produced 220kw from the factory. It was a great little engine

@KASLCustoms Год назад

Awesome thank you so much!!! Glad you like the video. I will definitely have more coming on this in the near future. Wow that sounds like an great little combo!

@brycebeamer2600 Год назад

Great clip 👌 I enjoyed the insight about all those different heads. Keep up the the good work 💯

@KASLCustoms Год назад

Thx buddy will do 🫡👊

@Frankie4231 Год назад

I got mine at the machine shop now, thanks for all the videos on this topic pretty pumped about getting everything bolted up

@KASLCustoms Год назад

Right on! Thx buddy!

@gpt5002 Год назад

Everyone knocks the smaller exhaust valve. It’s bc the compression is higher so it burns fuel more effectively so they don’t have to get rid of more excess gasses. Gasses are heavier than air. Idk if that makes sense but it does to me.

@foxfordcatguy2283 Год назад

The GT40 head was not "introduced" on the 1993 Cobra, they were already available from Ford Racing (Ford Motorsport SVO as it was called at the time.) According to "The Official Ford Mustang 5.0 Technical Reference & Performance Handbook" by Al Kirschenbaum, they were originally developed for a planned 1989 anniversary model that obviously never happened. So they then went in the Ford Motorsport SVO Catalog. The tubular GT40 also was available from Ford Motorsport BEFORE it appeared on the 1st Gen Lightning. I still have my 1992 Ford Motorsport SVO catalog with both the GT40 heads & intake available in it.

@KASLCustoms Год назад

Too cool 👌

@ogsuperflygarage Год назад

This is a great video comparison and explanation! Like how you kept the explanation simple and in layman’s terms. 💯 The podcast is really cool and informative. I appreciate the VERY relaxed nature of it. 💯👊🏾

@KASLCustoms Год назад

Thx so much buddy!!!

@terrygrover6440 Год назад

Out of all the ford heads I have to say that the E7s will run with any head if you do the right things to them , our car the green gangster runs 10s on motor with ported E7s and a stock short block and 9s with a 150 shot the car is on RU-vid if you want to check it out under grover boys racing , appreciate all the foxbody content you share with us 😀

@KASLCustoms Год назад

Wow that’s fast!!! Ok I’ll check it out thanks buddy!

@Backfire10 Год назад

Agreed. You have to optimize the chambers and clean them exhast port up.. for sure.

@ericmesa949 9 месяцев назад

The explorers in 1995 and 1996 were first introduced as state trooper,game warden and forest service Rangers vehicles with cobra style v8 GT40 3bar and AWD for the off road, dirt road and snow trail. In Canada and USA

@street_fighter_mx5 11 месяцев назад

I am loving these Ford videos. I have a miata and contemplating to do the ford 302 swap. I am learning everything I can

@KASLCustoms 11 месяцев назад

Nice!

@scottkinsella190 Год назад

Hey Gary , awesome video. GT40 parts so hard to find now.

@KASLCustoms Год назад

Thx buddy! Yes it’s true

@Canadiancigarguy Год назад

I’m in the middle of a 68 mustang restoration, my 289 needs a rebuilt but I’m going to put a 302 with gt40 heads in its place … thanks for the info that helped with selecting headers

@KASLCustoms Год назад

Right on! Glad I could help sir!

@CoffeeCaffiend82 Год назад

I used to have GT40p heads with a E303 cam and gt40 intake with 1.7 rockers on my 88 lx👌🏽 ran 12.9s all day on 93

@KASLCustoms Год назад

Nice!

@stephenroberts7816 Год назад

Great stuff! I love the old school builds from back in the day! The 3 bar heads are my favorite of the iron heads but they are no where near those AFR 165s you got on your coupe! Man I want to come down to NC to have a beer with you!

@KASLCustoms Год назад

Thx buddy! Same here. I love this old iron. You need to get off your butt and make the trip!!! 😎🍻🍻🍻

@midnight347 Месяц назад

They can be with big dogs porting he makes em outflow most out the box aluminum heads. Obviously ported vs ported the afr will win but the right porting can make these heads perform killer. Def worth it if you already have these heads. They will port match a gt40/cobra style intake to it as well. That with a custom cam will yield surprising results. People underestimate what can be done with these heads. Even the stock e7 heads with the right port work.

@kimcokevin Год назад

Spark plugs clear on BBK equal length headers on P heads. I put 90’s on all 8 spark plug wires for my ocd sake. They are accessible with a cut down plug socket, but a pain. Definitely a job to do when it’s cold. Best flowing factory Ford small block head ever, that’s the only reason why I went with them. If I could ever source the Ford Racing P specific headers then I would definitely purchase.

@KASLCustoms Год назад

Thx for the Info my friend!

@jimberry1227 9 месяцев назад

Great information Thanks for sharing your knowledge ✅

@KASLCustoms 9 месяцев назад

Thank you!

@hotrodray6802 Год назад

😎🔔 David Freiberger did dyno tests on headers about making dents into the tubes. Virtually insignificant until they're completely mangled. Plug clearance can be grained by using a 3/4" socket and hammer, maybe torch heat. 90* boots are no big deal either. JMO.😎

@autofox5.067 Год назад

I was at Foxtoberfest this year and I believe I was parked next to the guy that won the spot you gave away. I won my spot from Neomustangs. I look forward to being there this year as well!

@KASLCustoms Год назад

That’s awesome buddy!!! Same here

@williamcharles9480 Год назад

KASL Customs, I appreciate the video. I read the other day that the 3-bar GT40 heads that were fitted onto the 93-94 Cobra had a smaller combustion chamber. Something like about 60cc. The GT40 heads that went to other vehicles other than the "Cobra" carried a slightly larger combustion chamber in the range of 64-65cc. The Cobra also had the Crane manufactured, 1.7:1 Ford Spec. roller rockers rather than the 1.6:1 non-roller as used in the 5.0 HO. The source also stated that Ford took the standard GT40 casting and shaved .010 inch off the deck surface to achieve the 60cc chamber. I guess I need to check the chamber size on the 3-bar set that I got on the "GT40, Cobra" crate engine that I bought from Ford Racing back in 1994. Another curious thing that I found is that Ford Racing didn't include the 1.7 roller rockers on that Cobra crate engine either. I had to buy my own. One more thing to mention is that the GT40 3-bar set that I have has the thermactor ports, but doesn't have those restrictive humps in the exhaust ports, like the E7 castings. The ports are there, though, if you had to use them. If you need to plug the inlets for the thermactor, you can buy the plugs or use a 5/8"-11 set-screw (Stainless Preferred). This is a straight thread with a female Allen hex on one end and a tapered end on the other. These are NOT a taper thread pipe plug. Lastly, the GT40P heads don't have the thermactor ports at all.

@KASLCustoms Год назад

Great info!!! Thanks so much for sharing

@EffequalsMA Год назад

I had a set of early 70s 351 heads that I was going to port when a set of TW 170s came my way so, I put down the cutting burrs and sanding rolls. 1969-74 are all good in the 351W heads. 69-74 have the bigger valves, ok compression and no EGR bump. They are no match for a modern aluminum head but, they were the ticket back in the day.

@KASLCustoms Год назад

Nice find! yes, I agree. Very well said

@cfrank925 Год назад

Thanks for the tips!

@KASLCustoms Год назад

You bet!

@huck01955 Год назад

Lots of great info thanks

@KASLCustoms Год назад

No worries!

@4rered860 Год назад

I have a set of 3 bar aluminum GT40 heads, the only thing I found were these heads were built by ford for experimenting, but later trash this project (ordered to recycle these heads, but not all were sent to the crusher) and came out with the GT40X

@KASLCustoms Год назад

That’s awesome!

@4rered860 Год назад

@@KASLCustoms thanks, I was wondering if you know anything about them or heard of them, I was only able to get very little information about them through the website

@KASLCustoms Год назад

Sorry I wish I did but I’ve never seen a set myself

@jgiz6419 Год назад

awesome video, i picked up an 89 vert this summer and have been on the search for gt40 heads and intake. The car needs a lot of other work before I start doing performance mods, but if I happen to see an old explorer in the scrap yard I'm definitely going to pick up a set!

@KASLCustoms Год назад

Thx buddy! Yes these parts are getting hard to find… congrats on the car

@MP-pz9oe Год назад

Get some Edelbrock E Street, best bang for the buck, exellent quality ! Don't buy chinese junk, is wasted money.

@scott3521983 День назад

The GTP40 heads were on the Explorer and mountaineer Because they're the only vehicle sporting the 302 after 95

@wez50gt Год назад

Nice video mate. Lots of useful info without overload. I’m looking forward to being taken on the journey and learning more. 🙌👍

@KASLCustoms Год назад

Thx so much buddy! 🍻

@sweetassugar2076 Год назад

Great video buddy I have a set of 3 bars I found out of a 96 mountaineer. They are getting scarce in the junkyards around here in Massachusetts ! You did a great job explaining the differences between heads 👊🦊🔥

@KASLCustoms Год назад

Thanks buddy! Good find because you’re right, these things are getting super rare 😬

@faststang85 Год назад

Some of the gt40s like the ones i have off a lightning have thermactor ports in them as well

@randykirchhevel7311 Год назад

94-95 Cobra Mustangs have the 3 bar cylinder heads

@randomologist77 4 месяца назад

The Explorers were never supposed to get the 5.0. Ford wanted to use the 4.6s from the get-go, but they couldn’t make enough of them. Ford had leftover parts and 5.0 engine production capacity, but the existing 5.0 heads wouldn’t pass stricter OBDII emissions requirements coming in 1996. This forced Ford to redesign the heads for better combustion efficiency, and that led to the GT40P. Ford wanted better performance than the E7s put out for market completion which led to the GT40 heads being the base for the P’s. The reason the spark plug location is different on the P head is because being more centered improved fuel burn.

@chrisj2713 11 месяцев назад

Thank you

@johnjones928 Год назад

The p's had smaller exhaust valves for two reasons, first the original 40's had hardened, pressed in seats on the exhaust side to prevent valve recession, as they were meant for use on a lower sales volume unit Ford rolled the extra cost into the Cobra package. For the p head they used the same induction hardening as the E7's to save cost on the higher sale volume part. The second reason is the p was given an exhaust port that actually flowed marginally better than the original 40 so the bigger valve wasn't needed to meet the engineers goal. The truth is the p was never built to make more power, it was made to burn cleaner and be more efficient than the E7, the engine guys realized the 40 package in the Cobra has less emissions than the stock gt so they based the new head on the 40. Ford was worried their increased SUV sales would hurt their EPA CAFE numbers, that was the reason for the repositioned spark plug as well.

@KASLCustoms Год назад

Wow great info! Thanks for sharing!!!

@dragthatsht Год назад

I can tell you for sure ford was notorious for grabbing random parts when they needed them. I got a very early built E4OD in my 94 F350. I know another truck had the "wrong front axle" in a super duty. If they ran out of updated parts they would use what they had until the next batch came in. The guy that built my trans wasn't even surprised. Said he had seen it multiple times. He wrote official ford repair manuals for ford back in the day. Still had copies on his shelf. He came up with some of the updates for their transmissions. It wouldn't surprise me at all if they planned on running the 5.0 for a few more years in the mustang and the accountants told them to switch power plants. Fords accounts have always been what's held that company back.

@KASLCustoms Год назад

Well said thanks for sharing 👍

@leftcoastdrifter Год назад

great info!

@KASLCustoms Год назад

Thank you!

@shafferjoe1962 5 месяцев назад

Thank you sir.

@KASLCustoms 4 месяца назад

Youre welcome

@oregonfordguy9812 Год назад

we put a 308ci bottom end together, witha. e303 cam, gt40p head, better springs, headers, ssi intake, and areomotive fuel system..

@Mustangdan351 Год назад

Some additional info on the GT40 3 bars. The ones that came on the 93-95 Cobra's and Lightning's had the thermactor port's (smog port that the crossover tube attaches to) just like the E7's. I've heard that some of the very early 96 Explorer's also had the thermactor ports, but the later one's did away with them. Also since the Lightning had a 351 it used 1/2" head bolts rather than the 7/16" that the 302's use.

@KASLCustoms Год назад

Great info! Thx for sharing 🙏

@Airsally Год назад

Also as seen in your vid the P heads did not have a bolt hole to attach the thermactor a.i.r. tube to the back of the head. I had a set of P heads that only had the aft 2 exhaust ports that were drilled for the thermactor air to blow out of. Good luck with your build.

@foxfordcatguy2283 Год назад

The Explorer/Mountaineer only used the GT40 in '96 & early '97. Mid-'97 & later used the GT40 P which didn't have the thermactor bump.

@juanf4739 Год назад

I believe that these parts were used because they produce more power with better emissions. That’s too many intakes and heads to have been over produced. Great content keep it coming, thank you.

@KASLCustoms Год назад

Thank you - will do!

@damianhughes7034 Год назад

Great heads I've managed to get 3 pairs of 3 bar heads and 1 pair of 4 bar had 1 pair of 3 bar ported polished 3 angle valve job lower intake port matched n41 cam should run decent

@KASLCustoms Год назад

Right on! Thx buddy 👊

@anthonyanderson464 6 месяцев назад

The explorer and mountaineer was the last platform from 97 to 02 to have the 5.0 pushrod motor.

@patrickf4692 Год назад

I have a set of the original iron F3ZE GT40 heads still new in the box I bought from Ford Motorsport waaaaay back in the day--when they were still selling the Alan Roots heads lol. Fully assembled with the A50 springs, and stainless valves, they sold under part # L303...I also bought a 351 GT40 lower intake with a F2 # that predates the F3 lighting lower....

@KASLCustoms Год назад

Oh wow buddy! That’s awesome. Hang on to that stuff or at least let me buy them 😉😂👊

@patrickf4692 Год назад

@@KASLCustoms I actually went through my receipts I filed just to see what they used to cost in circa 2005ish. I paid $199.95 for each assembled head!!! When I purchased the heads I also bought the correct 93 Cobra 1.7 rockers for $139.95.....Lol...of coarse still in the box..My greatest trophy is a brand new N.O.S. Bigshot nitrous plate kit 02116 for the Cobra intake. It's the plate that goes between the upper and lower and adjustable from 150-300. Cost was $398.99. Try putting together a HCI with a power adder all brand new--made in the USA parts--for under a grand!!! My 86 GT has true flat top pistons factory, so I put off installing all this stuff until I could do it all...then the Army, then kids blah, blah... you know the story.

@KASLCustoms Год назад

Oh wow buddy! You are sitting on gold my friend. Good for you!!!

@cecilandrews7479 Год назад

For a bone stock engine daily driver the E7 is work fine. But to take that same engine and bolts assetto gt40p heads with intake you'll see a gain of around 30 horsepower. The difference between the GT40 and the gt40p the Gulfport was redesigned which allowed it to use a smaller exhaust valve it has a higher exhaust velocity. As far as changing the plugs I have zero problems with my headers. I don't run 90-degree boots on my plug wires I have a couple of plugs that have 45 degree boots. And if somebody finds that to be a problem, you have more problems than you think. The only thing with the p head that I have found is the headers available. At the time of building my truck there were no long tube headers available. Reconditioned 40 or P heads today or going for 600 to 900. So if someone wants to do some performance upgrades probably better off looking at flotek or AFR heads

@willsmith8586 Год назад

Ford made a ton of these GT40 parts for ski boats. There are a ton of 351/302 GT40 engines out there. Even ones with Cobra and GT40 intakes. That also solves what the B303 cams are for too. They were designed for boats. Which is why they create power at higher RPMs.

@KASLCustoms Год назад

Yes I’ve seen them in Nautique boats before as well

@patrickf4692 Год назад

The unique thing about the boat intakes is the lowers for both 302 and 351 gt40 marine engines is they are HEAVY cast iron...

@WhatisReallyGoingOn Год назад

Your video helped me a lot. I just picked up a set of GT40 3 bars with matching intake of a 1990 Indmar marine engine. What is going to be different from regular non marine? Planing on port and polish with a nice stainless valves and titanium seats. Dropping on to a 302 block with some new high compression pistons, for a Fox body mustang.

@KASLCustoms Год назад

Great find buddy!! I’m not 100% sure if the heads will be any different. I believe the blocks they use on the boats are of a more robust nature however I’m not sure if that carrys over to the heads or not. As for the intake, I believe the only differences you may find will possibly be in the vacuum set up and maybe the throttle body mounting position.

@chrisgutierrez5759 Год назад

The marine GT 40 intake has a cast iron lower instead of aluminum, so it could be used in salt water. There should be no difference in the heads.

@floydmarseeii4007 Год назад

Very cool video and comparison of the 3 different heads. Thanks for sharing. I’m seriously considering porting out a set of E7’s, just because. lol 😂

@KASLCustoms Год назад

Nice buddy! And that you for the kind words. I’ve heard of guys doing it before I’ve just never heard anyone say that the work was worth all the effort. Let me know how you make out 👍

@floydmarseeii4007 Год назад

@@KASLCustoms Rodney (50Tussin) has a set, that he ran. I think David (The Scientist) did the porting. The E7’s did pretty well. That’s where I got the idea.

@Airsally Год назад

I home ported a set of E7's pick up 2 tenths and 2 mph in the quarter. So @20 hp. You get more if you do bigger valves like DV did.

@floydmarseeii4007 Год назад

I’m gathering parts for a 387 stroker, this setup drives the compression rate up, so the open chambers of E7’s will help keep it lower to run pump gas. I’m planning to use 1.94, 1.60 valves.

@Turbo4Joe363 Год назад

@@floydmarseeii4007 You're building a 387 stroker and you're going to use OEM cast iron heads!?

@matthewmattix 11 месяцев назад

That is interesting 🤨 I have a set of gt40p head’s that I’ll be using on my 82 ford f150 with the 351w

@KASLCustoms 11 месяцев назад

Nice!

@patg9283 Год назад

Great video. Any chance your going to the international Mustang meet in Saskatoon?

@KASLCustoms Год назад

Thx buddy! No I won’t be making that one unfortunately… 😢

@jordanhill8199 Год назад

Great content! Excellent video showing the differences/similarities of the three. Do you or anyone else have solid HP/TQ numbers comparing the three? Currently running TrickFlow Trackheat intake and E303 cam with stock E7’s.

@KASLCustoms Год назад

Thx buddy! I don’t have solid numbers to share but I’ve always gauged the HP gains around 25-30 hp and TQ around 35-50 in stock format ( no porting etc.) That said, every set up is different so it’s hard to say with any certainty but that’s the gauge I’ve always used.

@jordanhill8199 Год назад

@@KASLCustoms appreciate it

@KASLCustoms Год назад

Anytime!

@patrickf4692 Год назад

It really depends on your supporting mods. My buddy has an '86 Capri and went through a carb phase--he dremeled the flat top pistons to fit stock 3 bar heads and a Weiand Stealth with a 650 carb....even though this was an 86 roller he actually had E5 heads(E7's with bigger chamber) on it at the time trying to get around the piston design and to ditch the terrible E6 heads. He actually picked up an unbelievable 70 HP and 60ish torque!! So basically he went from an '85 long block and added just those 2 mods. This will not be duplicated on an EFI motor JUST by adding either GT40 or GT40P's obviously...with your parts you'll pick up 30-35ish....Of all my buddies that switched to an E cam....they "sounded" faster--but were were typically frustrating to live with and tune --and usually slower than the stock cam. Not a knock against your preference--just something to think about--is the cool idle worth the temperamental quirks for no gain? Only you know that...Regardless with all the supporting mods the typical GT40 top end will make between 255-275 at the tires...Bone stock they dyno 190-200 rwhp. You will feel 75 hp...the cheapest way used to be buying the WHOLE Explorer engine and putting springs and the H.O cam. That's Easy HP and it used to be cheap...

@KASLCustoms Год назад

Great info buddy!!! Thank you so much for sharing - very valuable for the community 🙏🙏🙏

@chriswise1232 Месяц назад

I have a set of GT40s with 1.94/1.60 vales, fully ported. My advice would be to use these in their current condition or run something else. They're not worth sending to a machine shop for a performance valve job, guides, and a shave. If i could, i would lend my younger self $300 and say, "Get some trickflow heads and be done."

@midnight347 Месяц назад

Big dog does killer porting. He can make these outflow most aftermarket aluminum heads.

@chriswise1232 Месяц назад

@@midnight347 Most aftermarket heads will flow 240-320cfm on the intake side. With big valves, the GT40 heads will top out around 245cfm. He actually did a video on this.

@randykirchhevel7311 Год назад

I have a nice set of GT 40 3 bar heads which have the Crane 1.7 roller rockers I had a professional Port them with a little polishing which he put them on his flow bench. I will be running a Offenhauser 360 dual plane dual port intake with a step 1 from stock Jegs Roller cam.

@KASLCustoms Год назад

Very nice 👌

@randykirchhevel7311 Год назад

@@KASLCustoms Thank you building a 1930-31 Model A Coupe traditional late 50s early 60s open wheel hotrod on a 32 Ford chassis with 4 inch dropped straight axle 8 Ford rear out of early 70's Ford Maverick with coil over shocks and 4 link set up in the rear. Its going to have 2" chopped top so which is not very radical but still have that nice look. 94-95 Mustang GT 302 with the Cobra GT 40 heads with AOD transmission. Dry Lake headers. Going with a nice Emerald Green with light metal flake maybe white smoke ghost flames. Its going be like a Bonneville Salt flats racer. I have dreamed this car for a long time just trying to gather all the stuff to build it.

@KASLCustoms Год назад

That is awesome my friend!! Good for you

@taylormach1699 Год назад

Thanks for the info. I think I might put the 3 - bars on my 69 351 mach 1.

@KASLCustoms Год назад

You bet!

@midnight347 Месяц назад

I'd get them ported from a good porter before using them on a 351.

@justaguest5332 Год назад

There is also a two bar gt40 head they used in industrial and boat engines.

@KASLCustoms Год назад

oh really? I didn't know that

@cesarreyna6517 Год назад

What kind of compression i can get on a 302 with gt40 and flat pistons?

@ericmesa949 9 месяцев назад

Torque monster headers are the absolute best exhaust manifold replacement for any v8 explorer 1996 -2001

@KASLCustoms 9 месяцев назад

I've never heard of them before

@Anthony-rv3hr Год назад

Did you talk about the springs on the P heads? Supposedly they're only good for .450 lift. I wouldn't toss the P heads on a 5.0 Mustang even with the stock cam without changing those valve springs. Also, you should have talked about the HP you could expect to gain with the GT40 heads over the stock E7s.

@KASLCustoms Год назад

Thx for this. All of that is coming up in a future video

@angelo_giachetti 6 месяцев назад

Driving from California. I hear a N.Dakota accent.

@KASLCustoms 6 месяцев назад

LOL close - Canadian

@trailerpark187 9 месяцев назад

The gt40 and gt40p heads actually burn more efficiently then the other heads. That's what I heard why the Explorers got them. Emissions stuff I guess. I dont know if it's true.

@rexmasters1541 6 месяцев назад

Its easier and better to buy after market heads than what your doing.

@KASLCustoms 6 месяцев назад

Been there many times as well

@wm9904 Год назад

Good shit, just getting into 302s

@KASLCustoms Год назад

Thank you!

@wm9904 Год назад

@@KASLCustoms building it for a 68 cougar ex drag car. Will get a video or 2 up and def shout you out when we get the far. If you're ever in MN. Give a ring to lake county classics

@KASLCustoms Год назад

Awesome will do 👍

@MP-pz9oe Год назад

🤎💩

@fordguy8613 3 месяца назад

Combustion chambers size on the explorer gt40's were bigger than the cobras.

@NoFox_Given 11 месяцев назад

Wish I could make it to meet you. Just revisited this video to see if there is a possibility to use the GT40 spark plug in a E7. More heat ranges available for a GT40 is the reason. Looks like it’s possible but might be close. The two plugs are 1/4” different in reach.

@KASLCustoms 11 месяцев назад

It would be awesome! Sorry I haven’t looked into this yet

@jacintoespola3781 7 месяцев назад

La bujia de las gt40 tienen la rosca mas larga y al montarla en la e7 el piston la remacha. porque queda muy adentro en la camara. Y si inst la de e7 en la gt40 la chispa queda muy distante de la camara y trae problemas.

@aussi3212 6 месяцев назад

Here in Australia in the early 2000s gt40p were thought of as topfuel heads 😂

@KASLCustoms 6 месяцев назад

LOL thats awesome!

@jeremyplester3915 Год назад

I wish you had a header or manifold to show the difficulty with p heads, but it was a great video as I would love to put a gt40 set up on mine one day. I am also curious as to why the explorers got the gt40 set up.

@KASLCustoms Год назад

Sorry buddy. I didn’t have one laying around at the time 😢

@jeremyplester3915 Год назад

@@KASLCustoms still a great video. Thanks

@KASLCustoms Год назад

@@jeremyplester3915 Thank you!

@patrickf4692 Год назад

I thought I remember reading it had to do with emissions changing...even though they were phasing the old pushrod tech out...the explorer still sold like crazy, and I believe the thinking was to put a tiny little cam with better head and intake flow, so to not have to run all the smog gear of previous 302 models...they apparently couldn't cut if they had to redesign the heads to even cleaner burning P heads... If you've ever seen a header from a 302 explorer, you'd be amazed it made what it did...

@KASLCustoms Год назад

Yes I think you’re right on that. And those headers are pitiful…

@jackcarriger7200 Год назад

I always just figured they figured the suv may need the gt stuff for towing and also the suv weight more?

@KASLCustoms Год назад

I know right 🤷‍♂️

@quinton3997 Год назад

I've got a set of 87 thunderbird heads that have a smaller combustion chamber I'm not hearing anyone talking about those

@PrittFamily Год назад

So, when are you planning on the next video to discuss specifics of your retro GT40 build? I'm sure I'm one of MANY that is highly interested....because it's exactly what we want to do! In fact, it's what I'm gonna do! I already have the heads, upper and lower intake off a '97 Explorer sitting in the garage....ready to go! So, let your fanbase know!

@KASLCustoms Год назад

Hahaha thx buddy! I know I am excited too but I don’t want to start tearing the car apart until we he end of the driving season. I will however start tearing the heads and intake apart shortly to clean them up etc. thx for reaching out 👍

@PrittFamily Год назад

@@KASLCustoms Driving season? Being in Tampa, Florida I'm not familiar with that concept! Actually, Jan & Feb are arguably the better months for top-down around here. I went for a drive yesterday and sweated unreal! I'm thinking western Canada would have been a nicer drive yesterday! Thanks for mentioning your podcast...I didn't know! I'll be checking that out too....without my daughter around apparently!

@KASLCustoms Год назад

Hahaha yeah I wouldn’t even imagine being able to drive in Jan/Feb around here ⛄️😂. We have a lot of fun on the pod. I find that putting a podcast on while cutting the grass or something to that effect is nice because it allows your mind to be somewhere else while doing mundane things 👍. Also, we do get quite passionate and “colourful” with some of our language so maybe pick and choose the parts you show the younger ears…😉🍻

@MrMackch613 Год назад

Where does everyone find the info to be able to match cam with heads with intake etc. or more importantly how to tell what you have when you buy a used car. Thanks for this video i need to know what i have for heads

@KASLCustoms Год назад

You’re welcome. It’s best to speak with someone that knows what they are talking about- like a reputable machine shop or engine builder. It can be a very confusing path to navigate if you’re unfamiliar

@billsmith360 Год назад

Your question has no answer because because you give no info. What car? What engine? What year? And what do you want to do? I can help but you need to first fill the questions asked

@russriley3005 Год назад

on these heads you never mentioned the potential of them after porting. i used to take a set of old 70s 2 bbl chevy heads and make them run like a double hump heads. can you do that with e7 heads?

@KASLCustoms Год назад

Not that I’m aware of

@sorshiaemms5959 Год назад

gt 40 3 bar are very close to a 1969 to 74 351 Windsor head same valve size with a little better exhaust port

@KASLCustoms Год назад

I did not know that. Thanks for sharing 👍

@kevingilroy Год назад

Thanks for the close up on the P head. After watching another guy ramble on about stuff he read on wikipedia. You clearly show the real problem with the P head. The spark plug is too close to the intake valve. It really needs to point to the exhaust valve. Why? Because in boosted or nitrous cars. It can actually ignite the fuel mixture back into the intake. And we have all probably seen those explosions at drag strips. Also, I may have missed it, Where do we find 3 bar gt40 heads? Or on what?

@KASLCustoms Год назад

You’re welcome. The 3 bars came on all 93 cobras

@kevingilroy Год назад

@@KASLCustoms probably not so easy to find. But thanks.

@KASLCustoms Год назад

No worries 👍

@ML-dl1cp Год назад

Hey just stumbled upon your channel... Are you on the Island, by chance?

@KASLCustoms Год назад

Nice! No sorry I’m not, I’m in the Okanagan

@joeyleinart8354 Год назад

Probably because the tooling was setup and ready to be used in something

@chrisperkins6095 Месяц назад

I got a set of 3 bars with an E-cam. Can I use stock rockers and pushrods? I don’t want to worry about valve cover clearance with rollers. I do have upgraded springs. Thanks

@KASLCustoms Месяц назад

You could but I would recommend a good set of roller rockers. I run after market roller rockers with stock valve covers on my coupe. There is a tiny bit of clearancing that needs to be done but very minimal 👍

@chrisperkins6095 Месяц назад

@@KASLCustoms what brand rockers did you use? Thanks

@KASLCustoms Месяц назад

@chrisperkins6095 trickflow roller rockers 1.6

@m.pietro9087 Год назад

Thanks for clarifying. Can I use the GT40 heads on my 1988 Lincoln Town Car with the stock intake manifold? Thank you.

@KASLCustoms Год назад

I believe so but the intake is one of the big choke off points on the 5.0’s

@m.pietro9087 Год назад

@@KASLCustoms thank you. I think an aftermarket intake manifold is the way to go.

@KASLCustoms Год назад

Yessir!

@johnkrag6 Год назад

David Vizard and Charles Servedio are the guys to go to on porting these......RU-vid

@KASLCustoms Год назад

Right on thank you!

@elliottbutts153 Год назад

Hey great video. I’m a fan of anything OEM Ford stuff. I believe the CC on the P heads though is 58. Basically will raise compression on a stock 5.0 to around 9.5-9.6 compared to the 9.0 to 1 of the E7 head. The spark plug location and better angle is also suppose to be a better burn, more efficient. According to Ford lol. Now I did some research before ordering headers for my P heads. Had a few people say that the unequal length shorty BBK headers will fit perfect. So I ordered them and that is correct. They work perfect for the P heads and it’s one of the more reasonable price options too.

@KASLCustoms Год назад

Thx buddy! And thank you for the info as well. I was finding all kinds of different figures on the web for the actual chamber size of the two heads 🤦‍♂️😂. Thanks for sharing the info as well!!

@jordanhill8199 Год назад

So the BBK’s work fine? Could you post a picture if possible of the plug in relation to the header.

@cnebuda7422 Год назад

I have the bbk long tubes and they do not fit worth a damn on my p heads. Want to get the shorties but dont want to step down in power

@jordanhill8199 Год назад

@@cnebuda7422 thanks for info

@MP-pz9oe Год назад

@@cnebuda7422 you will loose some torque with the short tubes

@llb8851 4 месяца назад

If the 40p heads gt40 cast intake are so great. Why does my 98 explorer only make 215hp. Cam ? Intake ?

@midnight347 Месяц назад

It has a super mild truck cam and restrictive exhaust manifolds...

@brianlucero9536 7 месяцев назад

Soooooo help me out please. Im running on an Old 1989 v8 302 automatic bronco engine, planning to overhaul it and add gtp40 heads and a e303 cam. What else should I do to make it better more efficient? Maybe a better water pump? Idk really

@KASLCustoms 7 месяцев назад

by "efficient" Do you mean you want to make it better on fuel?

@brianlucero9536 7 месяцев назад

@@KASLCustoms well yeah, kinda. Stronger, faster, better fuel economy would love to use it at comfortable 80-85mph. My go to option rn is getting a junkyard 5.0 HO explorer engine and cam it

@KASLCustoms 7 месяцев назад

@brianlucero9536 lol - you’re asking a lot there… driven nicely, my HCI set up can achieve high 20’s/low 30 mpg on the highway

@chozen_pacolmx6436 Год назад

Hey KSL I have a 95 5.0 SN95 My crankshaft broke bcuz it was the same crank from 95… So I told him to redo the whole motor so he’s puttin gt40 s and p heads and headers with 373 rear end gears, new rods and pistons with throttle body everything will be performance do u have any advice on what else I should do I want it to be a street car that I can take in the track from time to time

@chozen_pacolmx6436 Год назад

Or do u think I’m at a good start?

@KASLCustoms Год назад

Hey bud - I think that's a great start. It will feel like a whole new car when you get it back 👍

@chozen_pacolmx6436 Год назад

@@KASLCustoms thankx for ur Honest My ankle said the said thing it will feel like a new car with more hp

@KASLCustoms Год назад

💯

@cnebuda7422 Год назад

didnt they use p heads for the "efficient" design of the chamber? better fuel economy/burn etc

@KASLCustoms Год назад

I think you’re correct on that 👍

@randybelcher6693 Год назад

I could be totally wrong but I thought the GT40 3 bar had 62cc chambers and the 4 bars had like a 58cc

@THE-SHOP Год назад

I believe so.

@patrickf4692 Год назад

I have a pair of brand new in the box L303 heads which were sold through Ford Motorsport way back....Just as a reference point they are assembled F3ZE heads and specs on box says 65.5 cc chamber.....I measured them anyway and I got 63 cc. I've seen them anywhere from 62--68 cc depending on what they came off...

@THE-SHOP Год назад

@@patrickf4692 sounds about right for 3 bar heads. 👍🏼 4 bar P heads are 58-59 ish CC’s

@markmccarty9793 Год назад

Skip over all of those and get a real set of heads! Got a set of ported 65 289 heads that'll outflow any of them! Get a set of RPM'S! Got a set of professionally ported 65 289 heads that will kick the s!@t outta Explorer heads! Go with a 351w if it'll fit!

@hotrodray6802 Год назад

🔔😎 A good video I would have preferred each head to be pictured straight on so that the valves looked circular not oval for a better perspective of chamber shape.

@KASLCustoms Год назад

Looking back on my education choices, I should have mixed in some film school instead of 100% mechanics 😂

@hotrodray6802 Год назад

@@KASLCustoms Don't be too hard on yourself LOL 😎👍

@longshot82383 Год назад

Picked up a 1969 351W for $50 should I just junk the E7 heads it came with?

@KASLCustoms Год назад

Nice! I would try and sell them first

@jdwht2455 Год назад

Good comparison. I have 302/5.0 in my '31 roadster. It has the 4 bar GT40P heads that came on the Ford Motorsport crate motor. Sanderson FF1 headers will work with those spark plugs in a street rod tho a couple are socket close but headers don't need loosening. 90 degree plug wire ends are a necessity as you noted. You do need to be aware that the Fel-Pro and other catalog listed OE type intake gaskets are a poor choice and partially block the ports. I did a search and found some that are perfect but unfortunately during a house move my current build sheet disappeared so don't have the Fel-Pro part number. The one thing I should have done was to open up the exhaust valeve to the 1.54 version but since the car is now for sale, someone else's project

@KASLCustoms Год назад

Thx sir. Thx for sharing as well