MAX FLOW 6.0! FACTORY LS HEAD SHOOTOUT! 

I'd really like to see a video of you tuning an engine to make max power. I don't care if it's 90minutes I will watch.

I wish I had a Time Machine, I would drop off a set of any LS heads off at Packard and Studebaker in 1950. Just to see if they would still be around today.

Just built a 408CI out of a 6.0 liter with a 235 Trickflow cathedrals that are ported and port matched to a LSXRT truck intake manifold that also has all the runners ported. Motor made well over 600 hp on an engine dyno with a smaller cam and a fantastic torque curve.

Hard to beat the price of OEM "LS3" heads vs aftermarket heads.

awesome. I asked for this comparison mainly looking at the L92 heads on a 6.0 and richard makes a video. you truly help out so many people with these videos. I watched them all.

So helpful. Working on a 68 Chevelle 6.0L LS Swap and this is super helpful

Thank you for taking the time to do all of these test so we can actually see what numbers all these combos put down also I'm trying to build a 6.0 for pulling I would like massive torque down low I dont see a video of that its mainly horsepower

Thankyou Mr Holdener!!!!!! That was some fantastic data, and lots of hard work!!!! Also Sir, thankyou for presenting hard factual data that is not skewed by big money advertising dollars like most magazines.

Love the videos. Cant wait to see what my 6.0L tsp tsunami cammed , cnc ported 799 heads with a cleaned up dorman ls2 does in my car! Hoping to have a fun weekend cruiser in my chevelle!

Great vid! Hardest working man on RU-vid

Hell yeah I'm in the process of getting stuff together for a budgetish 6.0 perfect timing Richard you are the man

Doing a Silverado SS build. Perfect timing

As always I really enjoy your videos. It really is hard not to learn something from them. Your comparisons are more realistically what I and some others want to know. Questions you answer for me are related to the old fashioned risk rewards thoughts. In short will the extra money I spent for a better head give me a realistic gain in power or am I looking at 5-15 horsepower for $200-400 set of heads. More if you are considering the trick flow heads. Thanks for the videos. Keep them coming and I’ll keep learning from you.

Richard’s imitation of motor noise is so much cooler than the actual dyno test 😂

Nice you made this video i was asking about a few weeks ago. Thanks richard!

Bro you teach me everything! This is the best man channel on RU-vid!

Both 706 & 799 are great when ported and bigger valves though... But great as always... Good info💪🏾💪🏾💪🏾

I back you up 100% on how you say cams are cams they're not prejudice to rectangle or oval I'm a engine builder for many years with a shops full of just about any and every tool we can think of the measuring airflow to dyno you get the idea and I'm tired of these young kids thinking certain cams are for turbos certain cams are for heads they won't learn till they get older thanks Richard I'm sure a few people pay attention

Bring that Trickflow is always out of stock I am just going to have the factory LS3 heads worked over and calm it a day.Thank you for all of these videos.They are the best!❤️

Very nice. Thx for the video. I've got a nice general direction. Cam intake tune and headers . So maybe 2k ish build.

I'm so glad I found your videos when searching about ls swap. Since I first started watch I've picked up a junkyard 2005 lq4 for 273$ today I picked up some 799 heads for 170 never dreamed it could be this cheap for power. I always thought you had to be rich to make big power

I might try augmenting the cathedrals with long turn radius enlargement with some more duration on the stick, also turns small valves into big ones for no valve train mass increase.

Thanks Richard for the info. Seems like im going with an LS2 since an LS3 is just expensive to get. Good to know that with these upgrades it will get me bewteen 400 to 500 HP which is where i want to be.

Awesome video I have the early 6.0 and that has the cast-iron heads on it trying to decide which head's to install. Thanks Richard

I would love to see you test a set of RCR worked rectangular port heads as well as a set of ported Advanced induction 243’s please.

Ya it be neat to see really high flow rec port heads with a big cam and see what kinda high rpm power can be made. I was waiting for a hit on the bag to emphisise 'best bang' or more snap or somthin haha. Nice, keep it up👍

Closest to my build so far. PRC 317s and pistons for cr with a slightly bigger cam. Looking forward to sending it lol

Hey Richard,I’ve seen this video before but didn’t remember it.This is a very good cylinder head comparison,can’t believe the 706 does so well on a 6.0!!I would like to know why GM decided to put the rec port on truck motors??Obviously have way lower torque below 3000 where they run 99 % while driving.Watched your latest last night blower verse’s turbo live.Good to talk about the newbies comments and doing your own research and not slamming them for uneducated questions and comments.Your channel is by far the best on engine testing and why this or that does better or not the best.Thanks so much 🙏🙏🙏🙏🤓

Great video! This makes me want to port the 243's on my 6.2 even more XD

I would like to see some CNC ported/milled rec port heads or even some aftermarket rec ports.

Can I just say one word? AWESOME 👏👍

Nice work!

Can you do a video about remote turbos, Showing how exhaust/charge length effect boost and lag? Enjoy your videos!

Great info as always thanks Rich!

Your videos are great stuff. I would like to see a video of you walking through a marine/towrig set using a LS stroker.

I have a lq9 and these parts on a shelf waiting for me. 821 heads milled .20 - .30 and ported Ls3 intake manifold and arp bolts

I'd like to see the trick flow against some cheap Patriot heads 225cc 317 s with 72cc Chambers 2.05 valves at 28 lb of boost. It'd be interesting to see the difference. I think we may be surprised. May be able to run a little more timing with the big Chambers. Thanks again these comparisons are great

Love your videos! I’m preparing to build up my L76 in my 2008 G8 and your videos convinced me to go factory heads, rocker trunnions upgrade, sloppy stage 2 cam and FAST LSXR 102 intake with 102big mouth TB. I will add fluid damper harmonic balancer and Vigilante 2800 stall converter. I want 600 hp NA, but I know I won’t get there without losing a lot of low end torque and I don’t want that. Thanks for all your time spent making these videos!

Even though I’m a month late to the party, lol, this was perfect. I’m literally pulling 243’s off my LS2 vette for some factory 823’s I had laying around.. Milled .020 with a .040 head gasket to bring compression to almost factory 10.9:1 with a cam swap 22x/23x on a 114.. hoping around 470 wheel in a M6 car. I literally had all the parts laying around which is why I’m doing this combination..

I have those GenX 225's and a Fast 102 intake on a 9.65:1 427 with an F1a. Everyone in the shop that dyno-tuned my car was talking about how my torque numbers where unexpectedly very high. I thought that was pretty cool considering they see one car after another on the dyno and know about what to expect out of a set-up.

I love watching his videos i learn so much💯

An interesting test would be to weld up the chambers on the LY6 and re-shape them. De-shroud the valves/bump comp etc.

I love what you do man,You gives a lot of data.New sub from Texas, Wish i could join you're team man:)

Thanks again Richard, can you show us the different limitations of valve springs stock/conical/beehive/dual springs on a few different camshafts please? At what rpm does valve float/bounce occur? Does the extra seat pressure reduce net hp noticeably?

Great as always!

Been waiting for this video!!

The 706 heads were impressive. I have a Silverado SS with a slightly smaller cam than you ran and 706 heads so it should be a fun truck when it’s done.

Love it. Thank you

As always awesome video great information but id like to see say a set of AFR rec. port heads on the dyno vs the trick flow cathedral ports. Then a stock intake on the trick flows as we know the fast intake makes great power with cathedral ports but will cost u almost as much as a set of heads lol!! Also maybe use a fast intake on the AFR rec ports do a stock manifold and a fast on both sets of heads. O ya might just as well throw a set of ported GM rec ports for us guys that like to get the die grinder out lol!! Great work as always keep doing what ur doing best stuff on RU-vid. Thanks Josh Gessinger

Excellent Advice Richard I’m about to do a LS conversion on Porsche 928 with the 6.0 engine and you have so much knowledge to offer✅ I’m not looking for high hp just reliability,which I haven’t had sadly Can’t be those GM engines✅ Many thanks Frank

Please do a regular early LS1 found in Camaro's. They seem to get the least amount of love and want to see how well it could do with its stock heads followed by a few pairs of different castings and a CNC aftermarket casting to round it off.

706 heads for the win Alex trebek. For a truck / suv to tow with.

I always found that a good set of heads are the way to go on a na motor . . Things have changed a lot in motor design . I really like to build a 6.0 motor . Maybe a boosted motor .

I would like to see the stock 317 heads as well. U usually are good about showing base numbers when you start a test.

Why is everytime i have a thought thinking of a combo or engine and wondering if there is a video and sure enough there always is (extremely in depth also) and if there isnt one there always seems to be one posted right after i look lol. Heavy bag holdener knows what i want!!!

So a set of rec port heads would make a decent amount of power, especially with a bit of polishing!

Great video

I think a 706 head with a high velocity porting job and fully radiused seats and shaved a little for a compression boost would be a great "factory" setup I think you cam choice 231/239 would be optimal...

Trick Flow was impressive... I'll bet they have a price to match.

Man you have some good content, you deserve a raise in my books.

It's time to do some back yard ported oem heads vs cnc aftermarket heads.

I just wiped the cam in my gen 1 small block .600/.625 was able to go up in lift due to duration and going to 110 ls instead of the 108 . reassembling now it's in a street rod .I hope it's what the tech guy at Herbert performance told me it would be.ill let ya know in a few days when I get to make a few digs

Just got some 823 heads for my 6.0. I'm gonna check piston to valve clearance to see what I have. Then I'm gonna mill them.

This is good info, thank you

Would you do a segment on the camaro ss L99. Not an ls3 conversion. Maybe look at keeping the vvt deleting the AFM. Finding vvt friendly camshafts and adding a centrifugal supercharger and turbocharger?

I was running 1.52 sixty foot/mid to high 10's with a 4.100 stroke .030 over GTO ls2 block 418CID. GMPP ported(cheep) ls3 heads same cam you have. It liked 7100 rpm. 11.7 compression. Cam was 235/250 114 specked for 93oct. Stock ls3 intake/big mouth 92 Tb(cheep). Very inexpensive build for the power. Was reliable as well with Moral short travel lifters. 98 T/A 4L60 4:10 Moser 9" 3600 Yank. A good test would have been mid length runners in a Fast 102 w/102 Tb.

Very informative...I'm in the process of getting a 6.0

Nice work

Let me start by saying that your videos are awesome! Big LS enthusiast here. You should do a video about reusing tty fasteners! That would really get some mean spirited comments haha.

Hey Richard. Thanks for the videos buddy, keep em coming! I love the way that comp cams 54-459-11 works in that 6.0. I have a full bolt ons, stock long block, 5.7 LS6 with 6 speed manual (2005 CTS-V) as a daily. Do you think that cam would work well in my car. I like a loopy idle and high rpm power. Thanks again Richard!!

Thank you

I would love to see a comparison of TFS Rec port heads vs GM Performance CNC LS3 heads (part# 88958758) on a 6.0l or even a 408 stroker using the same 459 Cam. I want to see if those TFS heads are worth the big difference in price. I'm sure many people are wondering the same thing. Please try to perform this comparison! Thanks @Richard Holdener!

Could you test the BTR EQUALIZER intake I’m really curious on how it would perform on a boosted application

Doing gods work as always!

I’d like to see you do a comparison between a set of Texas speed stage 2.5 706/862 heads and a set of stock 799/243s

Man o man that 6.0 with 706s and a little turbo in a 3rd gen nova and 3.25 gears would be a great street machine and Daily, probably get great mpg too

I'm really surprised how much power came with the 706 heads. They only flow about 230cfm, and had more than 500hp.thats a really good flow/hp ratio. The only thing I would have asked for is a comparison with ported factory casting. Some guys will send their factory heads for porting and springs as opposed to buying new castings. Tea has a good reputation for working the factory small valve heads into something really good. That could be another test...factory ls3 and 706 heads vs ported ls3 and 706 castings.

I bought a fully rebuilt 6.0L with Rec port heads already on it and a ls3 intake so I’m going to upgrade the valve springs and throw the 469 cam in it but man I really want those 225 heads and the fast intake for the extra power.

A set of cnc cathedral ports and application specific cam from TSP sounds like a winning combo to me.

Rich first off thx for your hard work and sharing your knowledge. Just bought a 05 gto kooks LT w 243 heads 6spd watching the graph I think 108 lsa for keeping it street is great. I want a nice chop in my 6.0 wut would you put in this nice gto? On lift int@exhaust I'll go with your decision. I've always had old pontiac stuff but this is my first Ls I've been converted! These motors are great 👍🏻look forward to hearing from you thx rich. From ala gulf coast.

Thanks

You need to take a look at the ProMaxx ls heads and maybe even test them.

What about the 706 heads with the battery symbol cracking. Not reliable enough. You can pressure test them, and torque them on and the can crack and leak. Expensive fix. Great content, thanks alot.

Hi Richard love the info you gather and share. I'm a gm guy myself and have built 350 based small blocks for what seems like for ever.im currently exploring the realm of oldsmobile engines. I'd love to see you test the 350 400 and 455. My current olds is a W31 clone engine with a 308 cam and a set of 7a , little a, there are two7a heads distinguished by the size of the A height next to the 7. It's got a proform 4160 750 Holley and a set of headman super comp long tubes.im going to put a 6AL and wires on it from msd. It's a healthy little brute lol. I'd love to see what or how boost would effect the block integrity? I've heard olds have main webbing issues in certain years and oiling issues. I've watched your Pontiac and Buick vids love the enthusiasm btw. Please get a 68 to 72 olds engine and flog it for us olds folks

That's a great test

It would be cool to see a 706 cnc ported head with a valve job go up against these trickflows or other big names.

I'm building a 5.3 with PRC ported 862 heads, a BTR Stage 2 cam, Fast LSXRT 102 and new rods and Pistons to bump the compression from 9.5 to around 10.5 should be a decent combo

Curious how much more the ly6 head would make with a milled head to bump the compression. It would definitely make more power sooner down low.

Sorry Richard, old thread here I know. 706 heads on a LQ9 is like 11.5:1 compression. Isn't that a little high for a daily driven truck? Would love to have seen the 799s on a LQ9 with a TBSS intake & BTR Stg 2 truck cam.

Moral of the story, 706 heads are good for up to 500hp

Im the Antipo Dean Ford guy on the Holden ER channel that does the most amazing dyno Emergency Resus on junker LS engines Yeah. And its good fellas! Um just a little note. Richard did a few really exceptional Boss 302 and Boss 351 dyno writeups in two seperate publications. Those engines dynoed within a few horsepower of each other, but the rpm peak with similar cam durations was shifted way up on the better breathing but smaller 302. When adding heads with another 50 cfm at full lift, its like taking capacity away and makes the engine more cammy with a stronger power peak and torque hump off idle to a period where it comes on the cam. For this reason, adding the really good after market LS TFS or better heads in the 350 cfm range, its better to target a milder cam duration. Chevy Gen 1 283-302-307-327-350 's taught us what a truly lumpy cam a Duntov 30-70 was on the smaller fuellie headed engines. So did those funny Limeys with early Mini Coopers and the various 970, 1070 and 1275 engines with really high flow heads....they always downgraded cam duration even on the bigger engines. Point is 50 cfm extra doesnt make a "lost torque" engine if the 50 thou figures and at lash durations are dropped back 5 or 10 degrees. As another word play on HoldenER. Holden in Australia won big with 205 cfm fuelie headed 327 and 350 Chev engines in the local 1968 and 1969 endurance racer Monaro GTS coupes. Ford responded with 351 Clevelands with 265 to 275 cfm heads and Ķ code style solid lifter 310 degree cams for 340 hp net. Ford quickly dropped duration to 300 degrees and got 10 hp more power and better torque. Even though its a Ford story, lesson is...Dont over cam your LS duration wise if its got very good peak flow readings. EFi engines can cope with most of the changes, but extra good attitional cylinder head flow is best dealt with by cam event. Peak power rpm management is not just done by LSA. People say vary overlap...its not that. Youve gotta drag the peaks for power and torque down to where they were with the 275 to 315 cfm heads. Adding ~50 cfm flow always requires downward duration cam revision to enjoy the flow increases. Not talking Boosted engines. Ive used exactly 50 cfm better flowing heads on my two 350 LT1 style engines. On a mustang dyno, they ran better rwhp figures with a more modern 295 degree at lash high intensity 525 thou lift hydraulic than the 326 duration at lash 360 - 365hp solid cam with less lift. A powerfull Lesson for all of us.

I would also like to see ported 706 heads.

Love your videos. How about doing a video where the high performance application is for more than just racing? Like if you want it for optimizing work tasks for a work truck.

I have been building this build for a couple years. It is the best build for a 6.0 add lighter valves and better valve train components on ported and polished heads and you get 600 every time. About the same price as a new ls3.

So can you remove the swirl ramp and the rocker bump from the 706 head and gain some top end power back?

Hey Rich. Have you ever built a Marine LS based engine looking for the best way to Marine a LQ4. Best combination to go with without water reversion.

Had 706s with a truck cam, going rec port and stg3 LS cam this time. You better be right holdener!!!

Hey great content...so I am doing my first LS based swap putting L77 in my Rs200 Altezza.Have you ever done a vid on this engine and how to get 500whp on it...so far I only have a 100 shot nos kit and stock engine .

Wow my ly6 heads are better then I thought! Thanks a lot brother! 👍🏻 Loving your channel man! Gonna have to dig through here and see if you have any NA cam comparisons for ly6 truck upgrade 😎

Lol dang rich helping me make decisions on my build ! 👍🏼