David Vizard's PowerTec 10 EP 29 743 HP "Out-of-Box" Speed-Shop-Parts 421 ci SBC Build
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- Опубліковано 3 гру 2024
- In this , episode 29, DV teams up with Terry Walters of Terry Walters Race Engines and engine builder and dyno tuner Jack Sain to show how choosing the approprete parts and just assembling them can deliver some pretty awsome street driveable power.
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Wilson did the first porting on this manifold. The porting in this video was done by me. I needed to change the taper to the exit. Epoxy the old fuel injector bungs. The ports and plenum are textured. Port entry was raised and port divider walls radiused. After a conversation with Terry, I heavily textured the entire outside of the manifold. The intake has two coatings one on the inside one on the outside. David may explain why but I doubt it. Thanks, Charlie
Charlie My extreme apologies here. I just did not remember your work here. Just so everybody knows we had to fix the shiny coating finish if I remember right. As has often been the case Charlie saved the day. Thanks Charlie. Sorry about my blunder here.
DV
Yes, the manifold came to me very smooth finish and minimum cross section at the apex of the turns. So the taper of runners needed to be changed. The spacers are also of note after a conversation with David. Four hole tapered to an open spacer. Makes for an easier transition for the air to make into the runner. Next visit the rum and cokes are on you! Thanks, Charlie
Yuk if you were an Aussie you'd be a queenslander Charlie.
Bundaburg rum is from Queensland, we drink beer south of the boarder.
@@shanerorko8076 I am a lightweight even at 220 lbs but I have been known to have a rum and coke with D.V.
Great content as always. My suggestion is do not cheapen it with the music, animation, and 90sec introduction. Your content stands on its own and is excellent.
Michael, I am very concerned about giving credit where due. Also we have some points that I feel should be put over to the audience and potential companies who might want to advertise. I am really big on making sure the mighty dollar does not have any influence on the integrity of our test results. Any chance you could go through and look at the credits and disclaimers and see where you feel we might do better?
thanks in advance.
DV
Loving this series, still catching up on the older videos too - what a wealth of knowledge that this man is sharing -- great work !!
I like the well though out combinations. They always outperform what many "sales pitched" combos make.
definitely! Mr. Vizard is very good at making high torque small blocks because of his cam knowledge and tight lsa preference. The engines built with those "top end kits" are always missing 40ft lbs of torque where it matters
@@NTRGFX You got that right!!!!
@@marvingvx1 lol YESH!
I always look at the CID numbers and almost 1.47 lb/ft/CID for torque and 1.76 hp/CID for power with no boost is impressive.
I also notice that port area to valve area on both heads are about 74%.
That baby sure made a lot of power for a tiny 256/260 at .050" cam.
I want to personally thank Mr David V. for outstanding content and recovery ! The automotive world would have suffard without you Sir. My question "What's next?"
I see an improvement. The crank trigger video shot, brought about the feel of being there. Less rotating mass from the dizzy? Or more certain breakdown of the field? Shallow valve angles are the ticket! That was a hot sounding engine as you faded the shot away with it still climbing past the moon! Cool.
I can’t believe all of the Physics considerations and methods to improving flow and combustion I have learned from the videos. The anti reversion angle on the intake helping a race grind to behave on the street to the rolled edge on the exhaust away from the flow to energize the exhaust port, to the divets to lift fluid back into suspension. It is a fun world! Thank you, David!
Thanks for always having great content and sharing your priceless knowledge!
Great video, thank you Mr. Vizard!
I've seen alot of your chevy and ford stuff "and enjoy it all" in one of your books you show a 700+hp small block mopar. I'd like to here you talk about chrysler small blocks! Or big blocks or hemis.....
2nd that
@@TheProchargedmopar 3rd that
I have a sbm pumping 750 hp aspirated here in oz a bit crazey on the street
I am really grateful for this series of videos. Just an incredible look into real expert engine building.
My dad was building 7-800hp 421 sbc back in early 90’s for late model dirt cars. Last one he built still runs to this day. Back then you were not doing it just picking parts out of catalog though. I can never learn everything he knows about engines of all types but especially Sbc and bbc. He’s also a master machinist. He’s forgot more then most will ever know 🤣
Dry sump and a nasty lightweight custom crankshaft makes these engines sound like heaven to my ears with lightning fast revs to 8-9k.
Outstanding numbers from out of the box components! This shows just how capable the aftermarket is, you just need to do your due diligence, and choose wisely.
Amazing and very educational, always learning new stuff from your team, thank you David Vizard Performance, from another Petrol head of New Zealand
David, thank you for sharing your vast wisdom. I would have liked to see some visual comparison between the 18 deg. and the 23 deg. along with your commentary, of course. But, I can't get enough, so may be impossible to please.
Fantastic 421!
What an awesome combo!
Another very interesting video. Regarding "streetable", would be interested in your thoughts/comments regarding an ultimate induction system that will fit under a stock hood line, such as a C1 or C2 Corvette. Also, what is a stable valvetrain that can fit in stock or near stock valve covers. Finally, would like to see what you could do along these lines with a serious but streetable big block, stock deck ht, underhood induction, and near stock valve covers.
Thanks.
Another great video thanks again as always I will do my own heads and I'm shur I will definitely be a happy street roder and I'll feal better because I did it myself will be a good feeling thanks again
Just pure Chevy goodness. Well done!
Sure is!
DV, I love my 460 fords, can't wait for that video.
This channel is dead for now, find his other channel here: www.youtube.com/@DavidVizard
SBC can still put in serious work. It's funny how everyone on the LS bandwagon in terms of it being the ultimate Small Block don't even really understand why. Stock 15 degree valve angle in LS factory heads are the key (and 8,000+ RPM on hydraulic lifters). Aftermarket LS heads are available in 11 degree valve angles. An argument can be made about the bottom end design of each, with the SBC breathing better and not suffering from windage as bad, where the LS makes that sacrifice (on stock blocks anyway) to add the additional 2 cross-bolts per main cap so that register cap walking is fundamentally never a problem. Obviously aftermarket LS blocks have much better bay-to-bay breathing. For a BIG RPM build, I would love to see someone build a small journal 10,000 RPM Motown LS and get the best of both worlds. The only question that I have about the Motown LS block is (not a factor for solid lifters) does it behave itself like an LS does ? turning 8,500 RPM on hydraulics ? or like a SBC needing a solid lifters for anything over 6,500 reliably.
yup, OEM's spend massive $$ for reliability and longevity on pump fuel. Apples and Nitro Methanol. oB
I noticed that the headers on the engine that’s on the Dyno has straight section mounting onto the cylinder head. Quite long actually. I remember reading Bill Jenkins comments on header design. Grumpy said a good header will have a straight section for the exhaust coming out of the heads. I actually named my oldest son William Tyler Smith. I named him after William Tyler “Grumpy” Jenkins.
Just like Pro Street racing!!!! Great video.
Love your work David from all the way out here in New Zealand 🏁👍
You have years knowledge and experience. Thank you for the information and the content you put out.
Nice ! Read your articles when I was cutting my teeth many years ago
Loved the video. I’m building a very similar engine but in LS 2 form. I’m very keen to see what the figures are on the dyno.
Small Block Ford 🤗 427 w
Nice engine David !!!
Thanks again David👍🤙🏻😁👌✌️
Love your channel.. wish my pocketbook would let me put one of these together.. keep up the great content..
Thank you for your insitghts and video 🙂❤👍
A real nice street stripp motor !
Pretty awesome build keep up the great work 👍
Great vid!
Ok, next... let's do a Ford 460 please. Please??
Oh yes definitely , we need some Ford 385 series content!!
I wonder what the difference in power would be with a port fuel inject system like maybe Kinsler 2 1/4" with electronic injectors?
Awesome content
At 5:04 into the video I lost David’s audio. The background music was still playing.
The sound problem was a bad set of earphones.
Thanks! enjoyed it
I would like to see a small block ford tested with a crank trigger igntion vs the dizzy. It would be intresting to see if a front mounted dizzy drops any power compared to a crank trigger.
Thanks for the great content DV!!
Like the straight forward views on making HP.
Very nice Chevy Build.
Thanks!
Thanks for another great video
What is your experience with CNC heads needing additional work once you get your hands on them?
I like the intros.
Thanks David!
Nothing wrong with David's ears. Sounds strong, measured strong
Bloanoke,VA go to Lynchburg or Martinsville for 2hp a cubic inch but race gas only
Amazing figures! Can a similar job be done with a SBF?
super good video be blessed folks
Would love you to do a independent test of my Flotek 220 heads. They claim 320 cfm @ .700 and 315 @ .600 with 23° the do have raised runners and I had to port the intake for a week to match
Another interesting and informative video. My only regret is that there is not enough interest to warrant similar effort put into 1940's and 50's street turned race engines.
I’m guessing, though I didn’t hear it mentioned, that you used a 4.155 bore and 3.875 stroke. Did you buy pistons specifically for the 18° heads? Really great results from this combo. Based on looking at high output semi-streetable engine dyno results, I’ve used 1.4 lb-ft/cu in at the torque peak and 1.25 lb-ft/cu in at the power peak as metrics for a very strong build. This one, as you mentioned, puts out 1.47 lb-ft at the torque peak and calculates to about 1.3 at the power peak. The torque staying above 500 lb-ft for virtually the entire test range is truly a strong result. A super result from a “bolt together” exercise! OTOH, $19,000 is a big budget. Regarding cost per hp or torque, I wonder if a more mundane BBC build could equal the power and torque curves at a bit less cost? Certainly far below the specific output of the small block…
How about some old school Flathead straight 8 or 6’s from the 30’s & 40’s…. I’d be really interested to see what you could do to modernize these oldies!
David let get your thoughts on sbf and sbc profiler heads
I’d like to see David make a slant 6 head flow
Must have been a hot and humid test day with that almost 7% correction factor. Still good solid numbers for a street engine and a very good broad torque curve. The intake cam duration around 220@.050?
David I did not get the comparison of the two heads i was interested in the 421 build
I like the concept of a stout but "assembled" build. That's what I hope to do with a set of stock but aftermarket FE heads on a stroker. The 390 block is a vintage piece so machining is unavoidable. Thank you.
REHER Morrison Offered a 15* 3.875 sbc single quad made 830hp … 20 years ago
Thank you for the valuable information. I looked, but didn't find a video on porting a Ford 4.6l DOHC head ("B" and "C"). There are so few options for the 4.6l/5.4l DOHC engines and the price of a pair a good SBC aluminum heads you pay for one heads plus cams are other $1500. So any help for us that can't afford a newer 5.0l Mustang to get their 305HP - 320 HP DOHC 4.6L closer to that 450HP mark( n/a of course) 😁
Thanks again .
YES. I have everything to build a 421. 69 Camaro. I plan on cruising around 2000 to 2200 at 60 mph. Need some advice on heads and hydraulic roller cam. Also would theTeam G intake that you modified in your book work?also going to use the 800 Q-Jet ported as per your book. Thanks for all the great videos.
Love to watch you, I want to learn so I can help my motors run the best that Thay can. Not to mush of this or that, make it just right. Try anyway we’ll see ya next time see ya bye bye.
I bought same setup from my friend who owns a machine shop, got everything for 6500 bucks, all brand new 😀
Mr. Vizard. A great video. What about 4-Valve engines? What is the best way to get as much power output as possible?
Burnd Su Got a hot deal in the works here for you. Just be patient!
@@marvingvx1 Thank you Sir. I thought of a special Chevy engine. The 4-Valve LT5 from the Corvette C4, developped from Lotus back in the late 80s. The displacement upgrades goes up to 441 cui.
@@marvingvx1 please and thank you!!!! Truly enjoying the informative content!!
Im a die-hard Chevy fan, but I still keep up with the competition occasionally, I saw where back in the day, a guy running a 300 I6 Ford, with 351W heads on it, I'm guessing 3heads cut in pairs of cylinders, and brazed, it was beating big v8 drag cars! I have a few 250chevy engines, I was thinking maybe try something like it, then I saw some Subaru heads, maybe a overhead cam, 4valve heads, weld 3 together, weld 3cams together! I guess welding aluminum together would be easier, getting the bore spacing, and bolt holes straight, is only part of it, then there is the timing Belt! But maybe it would run, it would probably be much easier to just get a vortec 4200! Probably tons cheaper!
That 300 I6 Ford had 351C-4V heads that were cut and brazed together. Those engines made big power across the powerband
You can also cut up two LS1 heads and weld them up. Practically a bolt on deal, just gotta Fab up a side cover.
May I ask if this engine was boosted apart from ring gap what would be changed. What HP would be expected?
Solid roller vs Solid Flat tappet ? pros/cons of each?
I believe That can easily be done with afr 23 degree heads
What is the compression ratio of the engine ?
You can see why flattening the valve angle 5 degrees in a wedge head was so important for Chevrolet for its NASCAR program. Very telling...
SBC can still put in serious work. It's funny how everyone on the LS bandwagon in terms of it being the ultimate Small Block don't even really understand why. Stock 15 degree valve angle in LS factory heads are the key (and 8,000+ RPM on hydraulic lifters). Aftermarket LS heads are available in 11 degree valve angles. An argument can be made about the bottom end design of each, with the SBC breathing better and not suffering from windage as bad, where the LS makes that sacrifice (on stock blocks anyway) to add the additional 2 cross-bolts per main cap so that register cap walking is fundamentally never a problem. Obviously aftermarket LS blocks have much better bay-to-bay breathing. For a BIG RPM build, I would love to see someone build a small journal 10,000 RPM Motown LS and get the best of both worlds. The only question that I have about the Motown LS block is (not a factor for solid lifters) does it behave itself like an LS does ? turning 8,500 RPM on hydraulics ? or like a SBC needing a solid lifters for anything over 6,500 reliably.
I am going to ask you something crazy? Can you get performance and Economy out a street motor? At what rpm is the best for both? You really have great stuff on here and would love to put it all together to make a good street driver but am not a Chevy fan but I know this stuff works on other motor to . Keep the stuff coming love it and thank you for trying to help the small guys out there.
I just wish that I had the financial, space, and tools to work on engines. Unfortunately I don't.
I would love to know what tunnel ram you would put on this engine? I would assume an Edelbrock Victor ram
Hey thx u awsome videos.......think u cam build a monster of a motor with a 2012 chevy implala 3.6 lfx ffx motor plz plz n thx u
I know it's getting old now and every man and his dog has done it. But what about an LS build?
Another great video.
One issue I've tried sorting a combination for is the 396 BBC engine and how its hard to get good numbers out of it like you can with a 400 SBC. Sure great Heads and Roller cam but just doesn't seem to do it like the small block. Any suggestions?
Chris, why are you building a 396 in the first place. A 454 should be a minimum here and a 496 far more preferable.
Good Vid. #!!!
Impressive! I did not see any mopar or more esoteric models mentioned, are they SOL?
No!!!!
@@marvingvx1 outstanding!
Mr Vizard. How would you Compare Don Lasito to a set of MBE heads? Do you think MBE have better heads?
How do you think Don compares to Darin Morgan?
I'm just interested because I look at Darin Morgan and the guy's at MBE as the best in the industry.
Shane, They are all good but it is hard to beat Don Lasito's cup car successes.
I am curious answer a question on small base circle cams vs a regular base cam. I am wondering if there a down side to using them, especially at higher engine speeds. Do you sacrifice longevity as the lift/ramp gets larger or steeper?
A reduced base circle roller cam gets slightly more aggressive and has greater side loads so stressing the lifters more.
@@marvingvx1 Thanks for the reply. I have wondered and could not find a difinative answer online. Rarely do you ever gain something without giving up something else.
I'm underwhelmed. Chad Speier is regularly making 840+hp with his big 23* heads with out of the box parts.
Yes but how streetable are they. Bear in mind that this build is also straight off the drawing board as specced by my Torque Master cam program. Compare torque numbers to get a better idea of the engines worth.
DV
His heads are heavily ported. His work is good don't get me wrong.
Interesting, But I am a Ford guy...How about more Clevor stuff
A builder, is like cosworth or cheverolet. They design a engine, cast their blocks heads machine everthing. Assemble and dyno thats a builder.
Everthing else is an assembler.
I spy a duramax cylinder head. Hopefully you can touch light on what you are doing with them
I am doing a hi-tech porting job on them. Watch closely!
This is an excellent series, unfortunately a few issues with the sound, much of the narration appears on one side only, not great for those of us using headphones. The music can swamp your voice at times too. One of the recent Saturday shows had such low audio levels that I had to give up. A great shame as I am sure many of us are enjoying the content.
Lost verbal audio around the 5 min., music no talking. stall interesting. Just waiting for the 3 ep on SBF cyl. heads especially the TF heads. just take care of your selves especially mr.Vizard.. thank you..
Mr Vizard can you do something on a 440 mopar maybe check out there trickflow 240 heads thank you
Bug Uncle Tony about this. If he does a bold project 440 motor I could be persuaded to do the heads - we'll just have to see how the cookie crumbles here.
@@marvingvx1 but there's only one of you no one can compare
@@marvingvx1 uncle Tony is the man tho
Hi David, Love the show but sometimes the audio mix is messed up. Your voice fades to almost nothing and the back ground music gets loud, them its back to normal. Its happend a few times now. Just thought I would let you know. Thanks
How would such an engine perform with ITB injection? Or with 4x55mm webers?
Webers can be made to work on just about any engine. The question is. . .why? True, they may produce a hair more torque at certain points along the curve, but the runner length of the single plane intake helps to keep that torque curve broad without airflow restriction.
Really hard to get a Weber large enough to feed an engine this size. If one wanted ITBs, injection would be the way to go. Wouldn't make any more power though
@@bobqzzi nah, I respectfully think EFI would net much more power and fuel control plus reliability, tune ability. How do you think OEM engines make close power on pump gas? this is a RACE motor and would not live on the street, can you even think of the hundreds of $$ to drive it on race fuel all the time. oB
Please, Please, Please,
Leave-out the Music and get a good Clip-on-Lapel-Microphone,
and turn-off all noise-maker machines when speaking.
You have the Best Content, and consistently the worst Audio.
Jim, thanks for your comment here. I am really working on the audio to get the best compromise. Check out my next video and give me your thoughts.
We like the old school stuff way better then some hair parch with gel in his hair talking
Yes, just eliminate the spooky music. Your voice is perfect, content as well, anything else is distracting.
I’m building somthing sorta similar right now. Pump gas street deal 389 cubic inch SBC dart block Howard’s crank,eagle H beam 6IN rods with ARP2000 bolts and DSS forged pistons. Using promaxx 225cc heads and a small base circle billet solid roller from Howard’s. Stroke is 3.875. Anyways hoping to make over 500FT pounds and 550+ hp it’s going In a C10 truck. What’s your opinion on me making over 500FT pounds?? Cam specs. 251/257@.050 640/640 lift with a lobe separation of 106
With a CR of 10.5/1 you should see 515 plus for lbs-ft and about 550 hp as you had hoped for with the right intake and carb.
@@marvingvx1 what Intake do you recommend?? It’s a truck with a 373 rear gear and probably a 3800-4000k converter. Carb I’m gonna use is a 850 double pumper
@@marvingvx1 do you think a victor JR would work better than a super victor?? Also what about a strip dominater
@@marvingvx1 I need to keep the torque UP because it’s a truck but I also don’t want to run a airgap or anything
427 small block?
Yes, built off a small block Chevy
You can build them bigger than that if you got plenty of money or skill
Like👍
Wow, that was an amazing build!
I hate to complain, but I found the video editing a little distracting. Maybe it's just me.
Michael, I edited this video and I came to a very similar conclusion after watching it a few mins ago. I think production was spread over too long a period and it became a little disjointed. Let me have your thoughts on this comment.
Thanks
DV
I am by no means a video editing expert. So take this with a grain of salt. But I agree the video felt a little disjointed. Also, I think the "special effects" were a little excessive.
That said, I will still watch your videos, because the information you present is top notch. This is just a minor gripe.
@@marvingvx1 Sometimes the comments that come up get a very short reading time, so please keep them a bit longer visible. I don't mind the background music or machines in the background, but having the voice only in the left ear for quite a while leaves room for improvement.
@@browserrr1 Thanks - that is easily fixable. I think doing video's at 12:30 AM might have an influence here!!!
@@marvingvx1 thank you so much for your dedication and massive commitment to the Motorsport World!