RICHARD,,,,IM A POOR BOY ENGINE BUILDER.... I JUST WANT TO SAY THANK YOU ON SUCH A GREAT JOB OF DOING RESERCHING THESE ENGINE PARTS AND COMBOS. AFTER WATCHING YOUR VIDEOS MY BRAIN IS GOING TOTALLY NUTS ,,,,I LOVE IT ,,,THANK YOU .

Thank You for Sharing! More education update since 1980! No more junk yard close chamber 396 350/360 hp heads...lol.

Hey Richard, I really enjoy your videos. they are all very in depth, very technical and very informative. Thank you for you excellent contribution to the hotrod world. I enjoy watching all your videos! looking forward to eh Nova's arc / mudder nova , whatever it is named!!!

Thank you so much for doing these tests, the information you provide is very valuable.

Thanks again for another great video. Very informative and increased difficulty in deciding what heads and build up to do🤔 decisions decisions.

Iv had SEVERAL 366 tall deck engines they are cheap fun !! , The block is very strong, they have a special rod in them and the rods are super strong.. I have pulled them apart set the ring gaps and play with bearing clearance and slap them back together with a big solid cam and valve spring upgrade and on Day 400 horsepower fogger kit it seems like the magic number is always 30 passes.. I have never had one make it to 40 passes in the quarter mile and by 35 passes there smoking and rattling ready to come apart I've used a 454 crankshaft and board them to 4 in and ran them in both blower and nitrous combinations , I have run them with a custom rods and small block forged pistons , 366 engines are extremely tough and they will make power on the cheap.. as hard as big block stuff is to come by nowadays I don't throw away anything and anyone that says 366 engines are just a boat anchor is either a open check book / unlimited funds person or not a true hot rodder

Hi Richard. Love the content you're providing through the videos. If I recall correctly, you mentioned having experience on rotary engines. Would be great to see some videos on these, if you have any info to share?

Richard I appreciate all the tests that you do and all the information you provide it's more help than you realize to a lot of people again thank you very much, I also love the Big block Chevrolet iron Head test and anything big block. Big block Chevrolet and big block Ford I hope will always be the mainstay of hot rodding even though it seems everyone has went LS and left a lot of the big block stuff behind them As you just proved nothing is easier to make power with and cheaper than a big block Chevrolet with a big old fat camshaft and a decent cylinder head

Richard Thank you for your Videos!!!

Richard, you are the best at what you do. Your name appears on many articles I have read about engine performance testing. I have a suggestion, what about offering consultations? I know I would spend a good amount of money for your thoughts on my LS combination. You know for sure what works and what doesn’t. Nothing costs more on a budget build then having to buy 2 camshafts cause you were wrong the first time. 2 sets of injectors or what have you. I will continue to support your content in the limited way I can but I would definitely pay good money for an email chat about what parts I should be ordering!

Its off subject but id like to see edelbrocks 100cc marine heads on a junk yard 454 and smallish 500" lift cam, that would be interesting. Favorite channel by the way.

Hey Richard, I rebuilding my boat engines this winter. They are stock truck blocks gen 5 I believe from Mercury. The boat is a 1995 and it depends on who you talk to, the hp is anywhere from 300 to 330. These are not the magnums. My plan is to have the block bored .060 over which is a 468? Power upgrade needs to be focused more on a nice flat torque curve and I run mostly around 3500 rpm. Would not need to go over 5000 rpm for my application. Looking for direction. I know the cam lobe separation needs to be 112-114 or there is a chance for water reversion. Other than that, looking for recommendation for a nice roller cam, heads, intake and carb.

If love similar info on a 460 based motor, I've got a 454 being sent out to the machine shop soon for my family heirloom wrecker, I also have a 460 I will be sending out once the rest of the work is done on my 78 f150 (still torn because pay off me wants to go all out and go 557 with airflow research heads, but part of me says do it cheap to make sure it gets done)

So what kind of power can you get from a Mark IV 2 bolt block. Have one out of a boat that has the comp 525/525 lift marine cam and air gap intake stock heads. Was wondering how far I could go with it, possibly adding a Torquestorm. Changing heads and possibly putting in a HR cam.

Would LOVE to see some testing with Enginequest 320cc cast iron heads.

Can you do some flex fuel ls testing? Ide like to use e85 stock parts and raise the compression. Even if I can’t run pump gas that’s ok.

nice combo on the short block , that cam really works nice . I used the biggest lunati voo doo solid roller with profiler #174 heads and only made 673 hp at 6400 and 588 ft lbs at 5800 . I bet if I used that crane cam it would have made better numbers .

Would like to see a comparison between turbo inline 6 and turbo 4.3v8 and test in the nova.

Great test Richard, thank you for hard work! I have a suggestion that would go perfect with this video topic. If you go an look up Skip White Performance located in Kingsport TN, they have a set of aluminum 335cc assembled heads that they say flow 370cfm intake/ 266cfm exhaust for $1079.00 per set assembled! It has to be the best price out there. Could you please acquire a set and go over them before you bolt them on and give us a overall impression of the heads, then obviously bolt them onto a 496 similar to this one in this video and let us know how they stack up to these or other heads.

No doubt depends on the quality of your solid roller lifters and how well you keep up with keeping your valve lash correct. There have been diesels with solid roller lifters since back in the 1950's and many of those designs are known to live for over a million miles which of course is like 250K on a gasser because of the rpm difference.

I never noticed that you're one of us cranking it up in Texas

To the mention of AFR 265 heads... i built a 496 with peanut port heads and a 212/218 at .05 cam. 465 tq at 3700 and 445hp at 4700 rpm. I think some AFR 265 heads with this combo would be great. Lots of low rpm power and a increase of peak hp and move it up in the rpm. I believe 500 hp would be likely. From what ive seen the afr 265 heads are about the best for a street motor.

Can't say it enough, when you get around to doing more BBF stuff, like that 429, you GOTTA get ahold of Paul Kane(High Flow Dynamics), he's THE stock BBF block/head expert and could give you some direction(maybe some parts? Not to put words in anyone's mouth...) on dyno testing stock BBF stuff. He's made well over 1000HP with stock 2-bolt main blocks, and has even been involved with a couple stock block nitromethane applications, including a Land Speed Racing build.

You can do a lot with OE iron heads if you have to. Just look at the truck pull heads Chad Speier does. But I really wouldn't mind me some MBE BIG 9s. That'd be a really cool test

I have a 2012 Chevrolet pickup with a 4.3 V6 I wish you could tell me I have a video showing on KZfaq some performance upgrades

Not to mention the porting the heads I'm a little blessed there access to machine shop but yeah great because time is money not to mention parts thumbs up my friend

I'm basically looking at this combo, but with a Scat forged rotating ass. with JE 44cc domed pistons for a 13.1 compression range. I'm shooting for about 750 HP, and hitting it with a 250HP Nitrous shot. Would these head gaskets work for this setup or should I go with a copper head gasket or do you have another suggestion? Thanks for any input. Also curious, what do you think this engine would produce in power if running alcohol as apposed to racing gas?

When I built my big block i went with iron Merlins because they were only like $50 more per head, for a much better spec head, than what Summit’s in house head was going for. Now I’m admittedly not a BBC guy, this is my first and only big block build. But I do know engines in general and IMO the World Products heads I got are much better for my build than the Summits of about the same cost, and they make a great powerband with my Howard’s cam. It’s a 488 CID/4.250” crank. 10.5:1 static comp.

Jomar performance has big block intake spacers in both square port and oval port for very reasonable... I have had many tall deck 427 blocks with a 4.500 stroke crank and 0.125 over one of which I have used for over 10 years in a mud truck with a 1071 Hampton blower.. tall deck stuff was blessed excess for us poor guys especially years ago when all of these aftermarket blocks were not available on every corner

What summit heads? Can you give the part number?

Do the exhaust ports look as far as location. Are the summits raised?

Hi Richard. Thanks for all of the great BBC videos. I have a question. I have a new set of iron World Products oval port Merlin Grumpy Jenkins bare castings that take 2.3 inch intake valves that I am thinking of using on a 454. In your opinion, are these good castings to use versus 781 or 049 heads? I can't find much about the Merlin castings. I can't find anyone who has a video on porting them.. Thanks a lot.

I ported a set of 3904390 and added 219 intakes, good springs, 1.8 rockers, 224 234 at .050, 560 585 lift on a 454, the mid range is assume. My goal was to build a daily driver. I think I maxed out as far as a build goes for a daily driver.

I'd like to see how ported peanut port heads would do.

Is there porting templates for the 088 heads anywhere ?

Also wanted to ask about those retro roller cams?

Hi Richard, When doing abc heads, Could you please do a dyne test with stock heads, No upgraded valves stock everything, Most people Just don't have the money to buy all brand new valves, Just valve job and that's it. Thanks

Hi, great show I have a set of 10051128 old pro stock heads> have you ever worked withes heads? Given the correct pistons and tunnel ram on a 509 engine what power can you get from this motor. This will be drag racing, Thanks Bill

What forged Pistons do you recommend? I'm looking at either something around a .125 or maybe a.200 dome to use with the stock peanut port heads. Unless I can run across a gen V heads.

I’m rebuilding a 496 big block has like 9.5 to 1 compression with bowtie Chevy cylinder square port heads that have been worked on what would you recommend for a hydraulic roller cam?

I would pick V8, the sound, the feel, how it looks. Have you ever tortured the Cadillac L37 DOHC 4.6L V8? Is all of that complexity really worth it? It seems that the 4.8L LR4 has more potential With less than half of the complexity.

I used a set of 3993820 heads off a truck 402 changed to bigger valves and a little clean up 113cc chamber made little over 650hp

Hey Richard I'm probably bother you about testing this cam already if so I apologize buddy but I was really hoping to no if you have any experience with this little lunati voodoo 625 625 219 223 on 112 in a ls I've seen good average power numbers from it just wondering if you have ever backed them up ?? This cam doesn't seem to walk the same line as alot of off shelf grind just looking for your insight on in please thanks buddy hope I'm not annoying you 👍

Hey boss, I cannot find that playlist.and Thanks for answering my comment question, about the 90 SS truck. During your live. I'm trying to find more info. I have ported 702 closed chambered heads. Trying to figure out what Cam and Pistons to go with. Air gap intake.

Can we see more of that 292 six!?

Your input would be greatly appreciated rich, unknown bbc 454 mk4, raced in pinks in a Camaro thats all i know, great engine lots of power, but on the very top end has a miss, that hurts et. Got a weiand tr dual 450s, petronix points upgrade matching coil, medium springs in dist, 10mm Taylor wires all in @40, running a little fat as well at idle, can't figure it out lmk what you think, thanks, btw love your channel

so can i drive 3500 kilometers,or use as a daily driver with that cam or is it a drive the odd day because every day use will beat the shit out of the heads

It seems anymore the only Square Port matching number stuff. That's of any value is to the guys flipping Turn-Key original tactory cars. And you wonder buying a turn key car. How good that rebuild was really done? And under those valve covers at the back of the block are they really matching numbers and everything's factory original?

So without a dyno how do I tell what the right oil level is ??

I know I am late but just a question about flow bench testing, do you flow through the exhaust from the combustion chamber and out?

Wish i would have caught you live. My question is did both sets of the heads you tested have the same size combustion chambers? If not some of the added power could have been from a compression difference not just the difference between the heads them selves

You can make over 600 Horsepower for the street with a set of Pocket ported Oval port heads With Stroked 454 to 496 Cid. !!!

Think you could do some more work with the 3800 series motors?

What stall torque converter would you have to run with this cam?

My understanding is that the older land rover v8s were based on the Buick 215. Wondering what may be available on any of that. My understanding is that they were light but not reliable and is why gm sold the design off

4 bolt main is great but 2 bolt w studs is pretty damn strong and good into 4 digits with a big Chevy Crossbolted yes But 2bolt main on a 13liter diesel making 1300ft lbs seems to hold

Summit bbc iron heads are dart heads. Almost identical to dart iron eagles.

You can use OBS for this kind of a stream. It is free. Can use webcam and share your screen at the same time and live stream to youtube.

Can you do a video on oiling bbc

I ran solid lift roller on my Camaro years ago and never had any problems with it . I think it was a 600 isky roller

Richard what’s the part number on the head gaskets you use on these gen 5 based builds?

The money and time your gonna spend on the 088 heads you might as well just buy the Summit's.

I wish we had yards in Aus littered with Gen4 / Gen5 bbc. We got nothing. Got pleanty of cheap L67 though. Waiting on an L67 big bang.

I run factory BBC 702 oval closed chamber heads. They were on 66/67 396/427 engines. They have bigger valves, plung cut chambers to unshroud the valves and good intake port work on the short side radius. Run a mild Clay Smith HR cam around 221/235 0.575/0.575 and my 0.030” over 454 is a torque monster in my 4500 lb C10. No traction in 1’st or 2’nd and will actually hook up when shifted into Drive. RPM Airgap/3310 Holley/9.5:1 CR/40* total timing, fun ride!

Some factory heads will support 1240 hp. On boost. Gm rec ports will.

Right on

Dart iron eagle 308. Would you or did you test them?

A big cam lowers the dynamic compression ratio. If your static compression ratio is already low, your dynamic compression ratio will drop even lower causing very low volumetric efficiency at low rpm and very poor performance. Then people blame the cam for it.

Salutations Richard Holdener, Can you help spec a camshaft for a 607 cubic inch BBC? AFR 265cc oval port or peanut port heads. 4.53" bore size, 11.625" tall deck. 1.270" piston, 4.71" stroke crank, custom 8" hyper forged rods. Fabricated cross ram intake, oil pan, headers. Going into 2nd gen Baldwin Motion Camaro clone resto mod. Modified firewall, foot box. Engine set back for 50/50. Manual easy ratio steering. Manual dual master cylinders with high leverage mechanical assist. Daily driver street for in denial mpg build. Want idle 450 rpm or lower. And custom low low stall nitrous converter. AC. Truck arm rear suspension. coil overs. Reinforced windshields. X bracings throughout. Daily driver with rear seats and mini tubs.

I have a pair of 98cc closed chamber heads if you want them let me know they’re just chilling in the garage

Richard, how well does the Summit head compare to the AFR 265cc BBC head??? Is it close or way short of the AFR? Thanks

I thought the summit heads were procomp/speedmaster

Wish I could have got in on the live chat

Saying Bryce just did a "pretty good job" is kinda strange. All the work I have ever had done by him was outstanding and up to Any standard I was willing to pay for!

New office space

I'm in it for thr 4.2!!!

Well Over 400cfm @28" from cast iron heads

Are the 460 heads E7TE-BD Good

045 heads any good? had u tried them Richard Holdener ? thanks RH

Richard, the world needs a PEANUT vs OVAL vs RECTANGULAR head test! Would you be so kind?

Get Dulcheck to port a set of factory bbc heads and see what it gains

So what it only revs to 2200rpm it's moving things around but never saw a broken block

I ran a solid roller lifter on the street alot until the day the engine died. On the street fire come out the exhaust when the valve broke and piston put the broken valve into the cylinder head and the engine locked up and puked coolant out the exhaust pipes in front of the rear wheel. And it wiped out most of the engine. Cracked head, broken valve, bent valves, chewed up piston, wasted rocker arm, wasted pair of roller lifters and more. They didn't have hippo lifters then. which means high pressure roller lifters basically. If I had to do it again. I would get the hippo solid roller lifters or morel solid roller lifters without the needle bearings in the wheel but years ago those lifters were about $2,500 for a set and they were not stock diameter. you would have to bore and hone the lifter bores out. the needle bearings in the roller lifters seem to be the problem and fall apart. I'm sure there's cheaper and better hippo roller lifters out by now possibly. But the real question is are they proven to last on the street? Anymore I want stuff to stay together and last having fun cruising and some racing not be working on it all the time. I found out if you keep the RPM's down you will save a lot of wear, tear, maintenance and valve lash adjustments.only push RPM to the max when you're racing. Cruising and riding on the street keep the RPM"s down and you'll save yourself a lot of time and money. The 468 big block Chevy I had would turn 9,200 and felt good on the street shifting that high but that's the engine above that blew up. And of course this motor would never make power at that RPM. High RPMs over time kill engines. Since then I've had several big block Chevy engines to go years and thousands of miles by keeping my foot out of it, only raced when needed and RPMs down.

what power can I expect from a pontiac 400???

A man built a custom set of mopar headers a few years ago before they really had tried proven dyno-proven headers. The Man spent well over $800 in a set of headers only to see the headers made less power than the set of headers he was using. So bigger is not always better.

CAN WE DO AN AMC V8 ALREADY..HEHE.....how about a 4o1 vs the WORLD...or a 36o amc vs 36o chrysler shootout.

Are all 8.1s 4 bolt main blocks

Personally I blame squirrels

Im running a set of 390 heads from a 396bbc there a 98cc closed chamber oval port on my 454

Tried any Australian engines?

781 with 2.25 intake and 1.90 exhaust.

Family photo album... Big Block Engine Family

Over the years at car shows and at the racetrack if it didn't have a square Port head on the big block it wouldn't fall out of a tree. In one magazine a few years ago on a 700 horsepower blown big-block Chevy engine. the 990 square Port iron big block Chevy head versus the 781 oval port iron big block Chevy head. THE IRON OVAL PORT WAS THE WINNER!!! On Max horsepower Max torque The Oval Port head beat the square port through the Dyno.

Summit bbc iron Heads discontinued, Dart bbc iron heads discontinued, EngineQuest bbc iron heads discontinued, RHS bbc iron heads discontinued....sad 😭

How do the 990s compare to the 088

Why don't you do a comparison on a motor an average working man can afford? Maybe a non stroker such as a 462 or 468 motor.

If you got iron heads and aluminum heads that had the same flow numbers and chamber volume, which would make more power? That's a test I'd like to see.

I can see

Needs to be a little closer

Mark "Vortech Pro" Jones is *the* guru for factory bbc head magic. He's getting 650-700 hp from GM #781 heads. He mostly uses hydraulic rollers or even solid flat tappet cams in his combos. Also using 2 bolt blocks as well.