Its nice to see an engine builder do what they do and actually build up something available rather than sell something. Watching you build to precise tolerances and values is what I grew up believing in when someone said "machine shop". I can't tell you how many times I've gone in behind a reputable "machine shop" just to find a lot of sloppy work. Fine work you're doing and excellent documentation. I look forward to notifications of new uploads.
Arturo Zarate could not agree more. It’s a very scary thing when the “machinist” you’re working with, you have to hold their hand on extremely basic things... that’s not a machinist. That’s a hackjob fraud. I want to walk into a shop and come out a more informed car guy.
thanks for taking the time to make the videos. Its cool to see all the steps involved. It gives me an appreciation for the amount of work that is put into a proper engine build.
Nice build ! I got a oval port 781 and 289 block .. this things crazy! Love the tunnel ram set up !! Great work awesome videos on the build.. gives me a new direction to build mine to !
I'm an old school Chevy fan. This video of a 467 build is impressive for the size engine, I enjoy following this channel. In 1982 I purchased a crate Ls7 and all I did to it was pay a local engine builder to do some work on the heads, I added a holley strip dominator intake, modified 830 holley, c12 racing fuel and I had a ball with this engine in a 1970 camaro.
I want to see a max effort pump gas iron head BBC oval port motor done to see what you guys can do, the bbc seams like your specialty so I would stick with that, then dyno and track test it, that kind of thing really helps the advertising and you don't see hardly anyone taking 781 heads very serious anymore vs what's available these days, it's nice to see you guys doing it without a million bucks invested, i always have to work with tight budgets for the engines I build and I think it's much more satisfying going as fast or faster than someone who just threw a ton of cash at their engine, jmo
I’d like to see you decreeing the cam starting with finding true tdc. Checking the cam for accuracy and also piston to valve clearance. Lots of varied info out there on these tasks. Killer big block you built there. Sounds like a dream.
Those numbers are definitely correct I had a 71 454 12.1 tunnel ram with two 660 Center squirter all roller and it was dynoed at 720 horsepower. I had it in my flat bottom aquacraft race boat. It haul ass.
I think this is the most impressive build I've ever seen. I would never have dreamed of using the oval ports for anything over maybe 540 horsepower n/a. I'm really looking forward to see what numbers I can get with mine when its done, but I'm pretty sure I'll need to buy my reciprocating from Vortec Pro. The machinist I was using for this level in the past died. Dick Champlain of Bolsa Machine. He moved back up here to Minnesota from Westminster California. I dint know how good I had it until he was gone.
I would love to see you do an intake manifold comparison on this engine. 1x4 4150 and 4500 Dart, Brodix, and Pro Filer , 67' Tri Power setup, and a couple of different tunnel rams (Dart, Pro Filer, Weiand).......great build and impressive power from 781 castings.....
I like your videos mark. Thanks for taking the time. Excellent engine builder. I’m old school also. But it’s a Ls world now. Love to see a N/A Ls build from you.
@@thereluctantgearhead4544 - Look, I'm an old guy and love my old school stuff, but BBC's are no longer king of the hill! The LS platform can out perform an old BBC all day. Just tellin' the truth.
@@Anarchy-Is-Liberty in your mind maybe, but I'm a old guy too chief, and I've built a lot of LS engines for people and they ain't all that. You do you.
Man that sure likes to rev, that's SERIOUS power, I was watching another channel who built a Mopar 440 stroker to about 500 cubes and that only made 530 with AL heads, dual plane intake
Oval ports are the way to go but with 2.25 intake and 1.85 exhaust. Header 2.125 internal diameter. The last two I did where 11:1 compression, single plane 1050 Dominator and made the same 735hp. I want to add a vacuum pump and Tunnel Ram to see if 780 is possible. I'd also like to bump up the compression and run race gas. Thanks for sharing.
2 Bolt Mains and Oval port heads! Makes you wonder why one should maybe waste(?) money on "glamorous" 4 bolt main blocks and costly square port heads! Great work guys!
@@wedge4hire To be forthcoming about the matter, I do NO not have a lot of money and have NOT had a lot of money due to unexpected health problems through out my adult life. I did not mean to sound like a big money snob, since I am not one. I am a rect port BBC fan. At one time I had a rect port BBC that I loved, that I worked like a slave to get, as well as several oval port BBCs along the way that I liked a lot, for comparison. The rect port BBC is much more of a notable step up than any kind of a waste. Granted it has to be done right, to get the right results, but those results are something to long for .......IF a person likes high performance cars........ rather than to mis label as a waste. My dumb shit brother blew up my Rect Port BBC. He took (stole) the car with out permission. He promptly blew the motor with his dumb shit antics. Those are really strong motors so once they are pushed beyond their limits, it's a real mess. THERE is the real "waste" of money!!! I have never had the financial resources to make it back to that (WONDERFUL) point. One more thing, when your bad ass friend wants to kick the shit out of your brother for blowing up your prize rect port BBC. Don't stop him, like I did. There would be another mistake/ waste. I know. Encourage the guy who wants to do the ass kicking.
I built a sbc 421 with a factory 400 block 13.5 to 1 and solid roller with 675 lift and 108 center. Its in my Chevelle and waiting to get the little stuff buttoned up to see how she pulls. Hughes Powerglide with a brake and 5000 converter. Time will tell.
I'd like to see you put a 572 short block under your 620hp 454 build with the same set up (no cam change). Use the extra chamber volume adjustment to make further unshrouding work. Or use the same head and switch to E85 fuel. Would you go to a tall deck and use spacers on the intake? (so a longer piston skirt could be used)
I'm all about seeing the Buick engine on the dyno. My buddy runs one in D stock class. Saturn Yellow GSX clone. Lance Line ran it about a week or two ago. Lance is working solo in his shop and he's swamped. I'm going to dyno a 440 Mopar I just built for a guys bracket car after nationals on his Dyno.
Do the ls1 build alot of guys have an ls and know thry make good power but just how much out of stock gear is a good question.love your bigblock build vids too.
Do a 427 with the oval ports please. I had a .60 over 427 with the 781's like you do them. Never did Dyno it but it had a smaller flat tappet and in a 2nd gen Camaro ran 10.90s. so I am curious to see this combo again
350 Buick 10-11.5 compression, Roller engine, pored heads, and Single plane take, your choice solid or hydraulic roller camshaft... Love to see that built as I am building a Fitech blow thru 88mm PT turbo 355 forged rods and pistons "reworked crank" sbb on e-85,, running the plumbing now, shooting for 700rwhp 1977 regal s/r,,, 9inch ford 4 link bad street car eventually.. but please one day build one... Build on Brother!!!
Enjoying your video series. Was wondering if you sell balanced rotating assemblies? All I seen on your web site that I found were complete engines. Also the rotating assembly that you are putting together would it hold up to a grassroots blower? If not what changes need to be made?
I’d like to see a 421,427,434 or a 454 small block build!! I’d like to see the numbers that one puts out & see what the torque is like on one!! I’d like to no if they would be a good truck motor & do well in a truck or not?? I’m building a 421 for a 1972 Chevy 4x4 pickup & I’m hoping it will be a good motor for it!! Any one of those motors would be awesome to see built & I’m pretty sure they would definitely do really good at the drag strip also!! I hear they are a good torque motors but would really like to see one be built & put on the dyno!! Awesome videos & lots of good info!! After I get my 421 done a big block will be my next build for sure!!
I would also like to see what could be done with a smog head 350 using the smog heads ported just to see what can be done with factory parts with race cam intake and headers
700+ HP! Holy hell! I'm also working on 4 sets of 781 BBC heads for various motors currently. I really want to know what ported 781 heads with 2.19 & 1.88 valves in a 396/402 engine can do. I'm sure you've done this combo and would love a reply. Thanks.
I was reading some of the comments. By the was that's a very nice big block. I am a small block guy. Someone was commenting on the 421,427.454, small block Chevy engine to know what the torque and horse power would be.I can tell you that I have a 467 small block Chevy engine with 18 degree heads and it makes around 820 horsepower 650 torque. I have it in a 87 S10 truck with no NOS in a 2800 pound truck and run upper 5.70s.very strong small block.
Enjoy your big block smart hp for the dollar. Thru the 80's builting race to what if (new and used parts that normally wouldn't try) 396/360hp factory and put no name 292 cam, 1050 Dom with the chrome 4 stack in a Doug Nash 5 speed 66 Chevelle with no carpet or back seat, Hooker headers, ladder bars, weld wheels w slicks. Car ran 10.86et even ran cold fuel can made out copper tubing, and coffee can. The car was used to deliver parts, and a junk yard dog. No one could believe the 1050 would run on a warmed up 396. It ran lean added 100 jet all four corners. Last time I saw the car still running 4 years later. I did set up chassis like high boy. For garage driveways and ha ha ha weight transfer. Wheelie bars were needed. Such a fun V-8 Vega killer back in 83. Most fun for the buck and Honest Charley gave most of the parts...fun years.
Would like to see this same displacement engine and setup run with a set of prepped 990 rectangle port heads , don’t see many people working with these heads anymore.
coronetfabz28 I have a set of 990 castings I’m gonna run on a 468 with male 10.7 compression in a 69 Chevelle. It will be a hydraulic Howard’s roller cam! It is a street car with boxed frame mods and 9” ford rear axle! I will run it at the track also !
Very sweet sounding!!!! Love to see the port work and flow numbers and specs on these heads! I know that it would be very difficult to make another set like them but very interested in seeing the work! Nice job!
Any tips on making a solid roller survive on the street? Is a hybrid roller as reliable as a hydraulic roller? Do you set it up with solid roller springs or hydraulic. I’m asking because I want to build a 427 and I know they like to rpm to get the most out of them. 7000+. Since it seems most people laugh at even wanting to build a 427 it would have to run very strong. What’s the pros and cons with a street tunnel ram on the street. Can they be dialed in to get the same drivability as a single carb or are they constant work? Thank you for your time and wisdom you share with us. Sorry I got carried away with all the questions.
I have an observation. It looks like the carbs are not going full throttle during this dyno test. Am I seeing this correct? Are you leaving power on the table by not getting full throttle? I am enjoying the 620HP 467 build videos and I am eager to see the track testing with that engine. Thanks.
I have some questions about a 509 truck pull engine that I had a professional engine builder build me and it missed the hp and torque that I thought he should have got. Would that be possible? Mark Ryan
If you can make this much power with factory heads and blocks, you should be able to make even more with a new set of iron heads and new block from Dart or World Products. I'd like to see a large bore over a short stroke high reving hydrolic roller around the 500 inch range.
Do you keep machined 781 heads built and ready to ship or do you need my cores? My last two atempts of building a motor for a little more power have ended in chewed up umbrella seals pluging the oil pump pickup . split a crank in my origanal 350 in my 70 chevy . then built a 454 and swaped to a th400 and ditched the grannie geard 4 speed. It had peanut port heads so i had manlie valves installed and ported the heads and got a cam in the 220 deg duration range . 18cc dome forged pistons. It ran great but ran out of poop around 4700rpm. I tought it was the small port but it was a fuel starvation issue caused by a faulty autozone mechanical pump. Detonation broke the rings and swaged a pice of one in the top of a piston. Upon tear down it too had chewed the valve seals up blocking the oil pickup.. Me and my bank acount are about ready to give it another go with 781s and a proper fuel system.
High compression ratio engine 12.5 :1 running on pump fuel The type of build I would like to see is a GMC small or big block Chevy, bored and stroked to a larger capacity 355, 383 or 408 cubic inch running a high compression ratio. Fitted with Vortec or Iron Eagle 49cc cylinder heads running on pump fuel. The following is an example of how to make this work. If a high compression ratio cylinder head is fitted, the engine will not work with pump fuel. The way to make it work is to restrict the inlet by fitting a long duration cam with Comp cams 1.3:1 low ratio break in rockers fitted to the INLET VALVES ONLY, the peak volumetric efficiency will be reduced from let’s say 100% to 80%. Alternatively if a custom ground longer duration 270 Magnum cam with 420 thou lift on the inlet 224 degrees duration @ 50 thou lift with a larger nose circle on the inlet cam lobes. On the exhaust 470 thou lift 224 degrees @ 50 thou lift, the engine will now run on pump fuel. To give you some idea how much the static compression needs to be raised and the inlet valve lift lowered do the following. Take the performance readings from an engine and look at the static compression ratio and the peak volumetric efficiency at maximum torque. Then fit the Comp cams low lift rockers to the INLET VALVES ONLY or fit a custom ground low lift cam. Do another full throttle torque curve and look at the data to determine how much the volumetric efficiency has gone down. Having started off at a hypothetical 100% volumetric efficiency and reduced it to an hypothetical 80% volumetric efficiency the following explains how much the static compression needs to be increased to make up for the reduction in volumetric efficiency. That is 12.5:1. Then the engine needs to be dyno tested and blue printed to record the specification. If an engine has been bored and stroked to increase the capacity. A budget cylinder head can to be fitted with 170cc or 180cc inlet ports. Not an expensive cylinder head with large inlet ports. The smaller ports keep the air flow velocity high. The golden rule is if the engine flows less fuel air charge compress the fuel air charge more. This is done by increasing the compression ratio. With a reduction in air flow a high compression ratio is no longer a problem. Fitted with a lift reduced longer duration camshaft, small induction runners and an increase in compression ratio the engine should have a flatter torque curve and not lose any low end torque. What’s been described here is a budget build, high torque daily driver. If a thunder bolt is wanted a longer duration 294 degree camshaft or similar would be needed.
Question tall deck BBC 632 tunnel ram and carbs 267/279 @050 756/767 11.1:0 cr 365 c.c. heads looking for the wow! Factor any suggestions? Very nice engine ya BUILT thanks
Here you go with a drag test thrown in as well...........................................www.chevelles.com/forums/13-performance/794225-vortecpro-454-peanut-port-engine-build-drag-test.html
Oh I’ve watched the peanut port drag test videos many times, I remember you talking about peanut heads on yellowbullet I believe. I’m hoping for some videos in the shop with you porting the peanut heads and installing bigger valves, and modifying the chambers, if that’s information you don’t mind sharing...
I have a 78 Suburban K20 that I am planning to put back together as I will need it to pull trailers that are carrying the motorcycle and place where I can sleep at night. I am hoping to put in a 632 Bluepoint motor for as much torque and power as I can get for this vehicle. I also would like you to do something a little different and build a Corvair pancake 6 engine to find out what is available in the range of power and torque.
Do a budget build using a stock 454 or a .030 over 468 with "stock" 781 vs simple "port & polish" 781 heads...,I'm running a 454 with stock 781 heads, Holley Air Gap single plain intake with 750 dp Holley carburetor in my Jet Boat. Would love to see how much power and flow you can pull from stock 781 vs porting them
A 351 W. I heard they can be built for some serious hp. Take it up to 357 ci. 0 deck the block @ the gasket knife cut the crank. Seems Small chev rotating assembly was used. ?? Alum aftermarket heads it was called the 357 magnum....
Like to see a lower RPM peak Big Block with 215 semi-closed chamber heads. Something like might be a Jet Boat motor, or one for a Mercruiser stern drive with a peak at around 5,500 RPM. Curious where the closed chamber heads fall down ?? We know you do work on "un-shrouding" and low to medium lift motors too, so how about upper mid-range TQ monster motor ... :D
How much porting was done to the heads? Looking to do a 454 with the old LS7 cam with some worked ovals, about 10.5:1, kind of a nostalgia type pump gas deal. Would love to see you guys test those old factory cams on some modern day compression ratios!
I feel like the 396 BBC has received bad press or has been ignored for the past 20 years. I would like to see a 396 that is given the benefit of newer technology. Perhaps fitted with a roller cam, open chamber heads (factory and aftermarket), better fuels, maybe EFI to see if 396s are really outdated or still viable against newer engines that use factory technology. It might be too broad of a scope, or require too many resources, but I have been curious about this for some time. I do like your real world approach, BTW. -Thanks!
Not that it has been given bad press its just a 'small' BB compared to the 427/454 and they're all the same design so why waste $$$ for a 396 build when you can easily build a 468. It's obvious that the newer engines such as in the new Camaro SS are superior regarding output as are the 10 speed auto. transmissions, etc. However these newer engines have the benefit of AL heads with superior flow and technology in all aspects like fuel delivery, internal part weight that cars from the 60's didnt have, even an L-88 was just pure power with huge cam and 12.5 while a new SS or ZL-1 idle like a kitten, the new Camaro is about a 12.5 car in the 1/4 off the floor, more than any showroom car from the 60's except maybe the L-88 with headers, gearing and traction but it got 5 mpg not about 20 like the new SS. I built a 67 RS Camaro with a 427/425 with 456 gears and a 4 speed in 1975.
What compression is it. I have a 467 as well with the 781s but they are unported stock crank has also been turned. 635 lift cam 10.5 : 1. Really impressive numbers from an iron headed 467 that’s crazy wow great job guys
I would like to see 383 or 400 small block build with some 062 production vortec heads fitted with 2.02 and 1.6 valves would make a nice low end torque street engine.
Popular combos, as long as it's not over cammed a 400 is awesome. I ran a small crane cam with a crappy single plane intake. Cheap headers and a box stock 750 dbl pumper. Was in a 68 1/2 ton and would boil the hides off from a dead stomp. Nice that it was fun as hell + pulled my car trailer. Would have been waay better with heads. Still had smog heads. Ran low 13s when it went in a 86 grand prix.
