David, the problem of getting older is not arthritis or slowing down. It is seeing trusted friends and family disappear before your time arrives. After saying that, I am pleased you can still produce videos like this so that others can learn the correct ways to build engines. Thank you. Terry from Australia.
David in the 1970s I built a 327 with 12.5/1 jahns skirtless pistons and 202 heads and an lt1 solid lifter cam and wiend semi hi rise manifold holly 850 double pumper carb and truck rams horn exhaust manifolds man it went like stink.
Your knowledge has helped me so much in my choices for my engines in my drag cars ,to be honest building sbc for friends that pay me .... your knowledge has made me money and a very popular social builder for drag cars and mud trucks
This is great stuff! I'd love to see a video some time, on what to do with the goodwrench 350 to help it along. When i was car hunting this motor was in over half of the cars i looked at. It has lousy 76cc heads coupled with really low compression.
🥝✔️There is another metric for proving the right lobe centre is used..Take Cubic inch displacement (355 in this case) , multiply it by the peak power rpm (5000 rpm in this case) and divide it by corrected SAE Gross HP ( 381 HP) . (355*5000)/381. The number you get is 4658. If you use a 114 lobe Center, the likely result will be 5335, (355*5200)/346. The lowest number from an average of five runs is the best result. The late Australian engine technician Phil Irving (1903-1992) used this method, and so does Former Open Wheeler and Touring car Engineer Larry Perkins. (1950- date)
@@t.g.5832 You try five different lobe centres and the one that makes the most peak power for the least Revs wins. That is, the lowest number of CID* Peak Rpm/ Hp ( Ai, or Aspirations Index) proves you've optimized the combination. The Method is called the Hilth Method, for determining the idealized peak on a polynomial data set. You have to do Dyno tests, and plot the results to find the combination that gives the most peak power for the least Revs per minute. To answer your question, if 5804,4 is the lowest factor, then it's best. If you had 5600rpm and 290 HP ( Ai = 5889,7) with another LCA, and 5800 rpm and 292 HP with still another ( Ai = 6058,2) , the 5500 rpm at 289 HP still makes more rev specific power. Just pulling 100 or 300 more revs to make 1 or 2 HP isn't worth it if the engine is losing port energy. The tightening of LCA normally pays dividends in just this way. People who do statistics and calculus often twig to this concept. The vast majority of people are peak power motivated, and don't understand that pulling an extra 200 rpm to get an extra, say , 2 HP isn't an improvement in efficiency.
My favorite sentence of, Mr. Visard, Most power for less money. Sees that as a PowerTec commandment. More power for less money that sounds like a great Given that you have to obey unless you have money to burn.
You no doubt have heard the one "Of all the Ritus brothers, that Arthur is the meanest one of the bunch"! Got a 350 to build and when that is done a 383 is next. Appreciate all the info, thanks again.
Hey David, Tim here.......rockers......my Stock Eliminator buddy (who broke the record for his class in '87, and NHRA had to retire the ET/MPH record, cuz nobody cud touch it)....went thru 120 rockers to find 16 that had the MAX ratio NHRA allowed..........'nuff said......GREAT STUFF!!!....LOVE ur new chanel sir!!!
@@hotrodray6802 i dont mind a roller tip, but it is of VERY minimal gain, as MOST ALL the friction is in the ball.....so the $ spent will be for almost no gain, where a full roller frees up ALOT of friction due to the roller bearing trunion
could you please make a video about multi carb set ups? specifically dual quad Holleys. Theory, set ups, manifold preparation, tuning tips, ect. I would love to see a technical video on that topic. Im putting a cross ram on my 383 and would appreciate the knowledge.
Every time he introduces himself, I find myself wanting to correct the way he pronounces his last name. Anyways I'm so glad I stumbled across this Channel and I would love to see more info on four valve heads if possible. Either way, thank you so much for pouring your expertise, experience and most of all your time into making these videos. I sincerely appreciate all of it.
I love your videos and applaud your patience. How on earth can you concentrate on doing a presentation with a grinder whizzing in the background. I can't do it and I'm just trying to watch.
David did you know Bret barber at Racers Edge AZ by chance? I worked for him for a short while he tought me about porting heads and flowing them. I would love to send you my 4.3 Vortec Heads one day so you can flow them too and tell me what you think about them. Thanks Ryan.
I like and subscribed the first second Mr. A. Wood turned me on to your station. As good friend of his I couldn't refuse. I will say too that I have learned a ton of of this channel but I know that if I wasn't penned up in a recovery bed for a good month now, I would be working and donating to the channel. It would not be a ton but at least something to get him a coffee and a. card from Goodman. Great evening and I will we can get
Great Viedeo The Edelbrock Air Gap is one of the best dual plane because of its air-gap? I will completley block off my exhaust heat passages and maybe use a heat shield / heat refelcting paint on my 283cui to get some power back ! Thanks DV !
What lobe centerline is correct for compression ratio of 8.5? David thank you for sharing your knowledge, and supporting this with needed information. Following you and your books for many years.
Hello David I just want to let you know that you have changed how I build my engines.i really never paid attention to the cfm on heads and match the cam to the heads,so thank you for bettering my performance I watch everything you post can you do a build of a stock 71/72 400 4 bolt.i can't wait to see u build it.
@DavidVizard I’d like to get in touch with you sir what is the best / easiest way ?? Thanks in advance I greatly appreciate your knowledge and what you do.. Look forward to speaking with you .. have a blessed day sir !!
Hay Dave I have a 94 ranger with a 2.3 . I put a new trimming belt on and it doesn’t seem to have as much power.? Maybe slack in the belt idk .?? Wold it be wize to advance it a tooth ? Grate content btw thanks for all your R/D save us fellas time for sure!!
Lots of great information in this video. I especially liked the armature paint to seal the shot blasted surfaces. Some questions come to mind. Can the armature paint be used everywhere inside the engine? How many HP, roughly, does back cutting the valve stems and modifying the seats good for and does this increase with ported heads? If I understood correctly in the Vortec porting videos Dave mentioned that the seats affect low lift flow more while the porting affects the higher lifts more. I'd imagine that the seat modification would work more at lower lifts while the back cut stems should work more at higher lifts is this correct?
Hey DV, I have a question. In the video "Race winning low buck 383 sbc build", you've instructed us to use a LSA of 107 for a flat tappet cam. In this video you say to use a LSA of 108. Could you please clairify? Thanks in advance, love your video's and knowledge sharing:)
I think I missed something here was the externally balanced engines crankshaft and rotating assembly balanced or is the 400 Cid dampener better then the 8 in dampener that originally came with that engine I understand that each are externally balanced or is the recommendation due to the material used between the inner and outer dampener pieces
On the dual plane’s I was curious as if you had ever tested any of the old Weiand stealth mid rise dual planes? I was able to score one for virtually nothing and it seems to be a very nice piece.
Hi David. I have been watching your videos on the sbc along with some other research, and i have a general idea of what i want/need to do. Would you be willing to do some emailing with me and help iron out my build?
Love the knowledge share but Please get some insulation i cant concentrate on what your saying for the Dude porting heads in the background! WFO the Hole show!
People wanna talk about hillbilly accents and how different we talk. People from the UK speak the same... In that they pronounce the first two letters of any word. If you ain't a hillbilly or from the UK try it yourself... Speak with emphasis on the very 2 first letters of any word, and report your results here
You jump back and forth in subject. You use constant filler as search for words. You have a ton of distracting and interfering noise. You know engine beefing but really need to learn some communication skills.
Come on David, doing a video in a operating shop doing business is just dumb. I made it less than 2 minutes before leaving this comment and then leaving. It's happened in other videos and I just don't understand it, you can't be so deaf that you can't hear it. You might be able to ignore it but I'm sure there are many more like me that find it EXTREMELY annoying. There has to be another room you could use or do the videos at home. I would be willing to bet that there are very few of your fans that aren't bothered by this and honestly it's just stupid that someone on your team hasn't brought this to your attention. I would be willing to say that absolutely nobody wants to try to make out what you are saying over the background noise of a die grinder!!!
@@ryangulley2051 I have ported plenty of heads but have no idea what your comment has to do with anything I said? How would whether or not I have ported heads have ANYTHING to do with a person having enough brains to not make a video with a bunch of background noise that has nothing to do with the video itself??
David, the problem of getting older is not arthritis or slowing down. It is seeing trusted friends and family disappear before your time arrives. After saying that, I am pleased you can still produce videos like this so that others can learn the correct ways to build engines.
Thank you.
Terry from Australia.
Yes - tell me about it!!!
Excellent DV🏁 and My Condolences for Marvin🙏🏻🏁
Paul, thank you.
Now subscribed David . I’ve been watching and liking every video I see of yours. Because they’re great!
David in the 1970s I built a 327 with 12.5/1 jahns skirtless pistons and 202 heads and an lt1 solid lifter cam and wiend semi hi rise manifold holly 850 double pumper carb and truck rams horn exhaust manifolds man it went like stink.
Thank you.
Every video has unique perspectives I just don't see anywhere else.
Well
Done.
Your knowledge has helped me so much in my choices for my engines in my drag cars ,to be honest building sbc for friends that pay me .... your knowledge has made me money and a very popular social builder for drag cars and mud trucks
This is great stuff! I'd love to see a video some time, on what to do with the goodwrench 350 to help it along. When i was car hunting this motor was in over half of the cars i looked at. It has lousy 76cc heads coupled with really low compression.
ITS FUNNY HOW PEOPLE CAN WATCH A VIDEO FROM AN ACCOMPLISHED EXPERT, AND NOT BELIEVE THE FACTS AND ACCEPT
You shouldn't just believe the facts, you should verify the facts. Especially when he openly admits to misleading people to gain the advantage!
🥝✔️There is another metric for proving the right lobe centre is used..Take Cubic inch displacement (355 in this case) , multiply it by the peak power rpm (5000 rpm in this case) and divide it by corrected SAE Gross HP ( 381 HP) . (355*5000)/381. The number you get is 4658. If you use a 114 lobe Center, the likely result will be 5335, (355*5200)/346. The lowest number from an average of five runs is the best result. The late Australian engine technician Phil Irving (1903-1992) used this method, and so does Former Open Wheeler and Touring car Engineer Larry Perkins. (1950- date)
Dean, Met both those guys when I was in Australia. Sharp cookies for sure!
@@DavidVizard 😁👍🫡
Sorry, but I do not get it. How should I go from 4658 to 114 LCA?
Or in this example: 305cui x 5500/289hp = 5804,498 and now what?
@@t.g.5832 You try five different lobe centres and the one that makes the most peak power for the least Revs wins. That is, the lowest number of CID* Peak Rpm/ Hp ( Ai, or Aspirations Index) proves you've optimized the combination. The Method is called the Hilth Method, for determining the idealized peak on a polynomial data set. You have to do Dyno tests, and plot the results to find the combination that gives the most peak power for the least Revs per minute. To answer your question, if 5804,4 is the lowest factor, then it's best. If you had 5600rpm and 290 HP ( Ai = 5889,7) with another LCA, and 5800 rpm and 292 HP with still another ( Ai = 6058,2) , the 5500 rpm at 289 HP still makes more rev specific power. Just pulling 100 or 300 more revs to make 1 or 2 HP isn't worth it if the engine is losing port energy. The tightening of LCA normally pays dividends in just this way. People who do statistics and calculus often twig to this concept. The vast majority of people are peak power motivated, and don't understand that pulling an extra 200 rpm to get an extra, say , 2 HP isn't an improvement in efficiency.
My favorite sentence of, Mr. Visard, Most power for less money. Sees that as a PowerTec commandment. More power for less money that sounds like a great Given that you have to obey unless you have money to burn.
You no doubt have heard the one "Of all the Ritus brothers, that Arthur is the meanest one of the bunch"!
Got a 350 to build and when that is done a 383 is next. Appreciate all the info, thanks again.
Hey David,
Tim here.......rockers......my Stock Eliminator buddy (who broke the record for his class in '87, and NHRA had to retire the ET/MPH record, cuz nobody cud touch it)....went thru 120 rockers to find 16 that had the MAX ratio NHRA allowed..........'nuff said......GREAT STUFF!!!....LOVE ur new chanel sir!!!
PRW roller tips are great !!!
@@hotrodray6802 i dont mind a roller tip, but it is of VERY minimal gain, as MOST ALL the friction is in the ball.....so the $ spent will be for almost no gain, where a full roller frees up ALOT of friction due to the roller bearing trunion
Very nice valve spring pressor that is genius.
Also can use drill press with spindle lock
could you please make a video about multi carb set ups? specifically dual quad Holleys. Theory, set ups, manifold preparation, tuning tips, ect. I would love to see a technical video on that topic. Im putting a cross ram on my 383 and would appreciate the knowledge.
I would be interested to see a bit more about this build and the results, especially any changes and improvements.
That video was already about 6 mins over what we have set for a provisional limit!
@@DavidVizard Hopefully another video to see how it progressed?
Every time he introduces himself, I find myself wanting to correct the way he pronounces his last name. Anyways I'm so glad I stumbled across this Channel and I would love to see more info on four valve heads if possible. Either way, thank you so much for pouring your expertise, experience and most of all your time into making these videos. I sincerely appreciate all of it.
I love your videos and applaud your patience. How on earth can you concentrate on doing a presentation with a grinder whizzing in the background. I can't do it and I'm just trying to watch.
I'll bet you always have a radio blaring all day long..??
Could we get some more grinder in the background so we know it's a live shop?
David did you know Bret barber at Racers Edge AZ by chance? I worked for him for a short while he tought me about porting heads and flowing them. I would love to send you my 4.3 Vortec Heads one day so you can flow them too and tell me what you think about them. Thanks Ryan.
I like and subscribed the first second Mr. A. Wood turned me on to your station. As good friend of his I couldn't refuse. I will say too that I have learned a ton of of this channel but I know that if I wasn't penned up in a recovery bed for a good month now, I would be working and donating to the channel. It would not be a ton but at least something to get him a coffee and a. card from Goodman. Great evening and I will we can get
Get well soon John
Thank you Mr Vizard! greatly appreciated!
It would be great to see links to the cams that you suggest.
Thank you for all the wonderful info you provide.
Hose down the fighting 😾😾🤣. Also thank you for sharing your experience🤗.
Great Viedeo
The Edelbrock Air Gap is one of the best dual plane because of its air-gap?
I will completley block off my exhaust heat passages and maybe use a heat shield / heat refelcting paint on my 283cui to get some power back !
Thanks DV !
What lobe centerline is correct for compression ratio of 8.5?
David thank you for sharing your knowledge, and supporting this with needed information. Following you and your books for many years.
Thought he said 108*..
Hello David I just want to let you know that you have changed how I build my engines.i really never paid attention to the cfm on heads and match the cam to the heads,so thank you for bettering my performance I watch everything you post can you do a build of a stock 71/72 400 4 bolt.i can't wait to see u build it.
at the dentist office
That's a hell of a cavity..
"Reprofile, the term I use is "Re-grind, or as you said Reprofile the camshaft. been doing it since I was a teenager.
@DavidVizard I’d like to get in touch with you sir what is the best / easiest way ?? Thanks in advance I greatly appreciate your knowledge and what you do.. Look forward to speaking with you .. have a blessed day sir !!
Any thoughts sir on the mcfarland torque link intake manifold?
Thank you for sharing. On your carburetor selection chart, I noticed the annular boosters (#4 & 5). Where do those rank for the Air Gap intake?
Does painting it any Color other than flat black keep the temp. Of the block and components hotter?
Great stuff
Hay Dave I have a 94 ranger with a 2.3 . I put a new trimming belt on and it doesn’t seem to have as much power.? Maybe slack in the belt idk .?? Wold it be wize to advance it a tooth ? Grate content btw thanks for all your R/D save us fellas time for sure!!
Lots of great information in this video. I especially liked the armature paint to seal the shot blasted surfaces. Some questions come to mind.
Can the armature paint be used everywhere inside the engine?
How many HP, roughly, does back cutting the valve stems and modifying the seats good for and does this increase with ported heads? If I understood correctly in the Vortec porting videos Dave mentioned that the seats affect low lift flow more while the porting affects the higher lifts more. I'd imagine that the seat modification would work more at lower lifts while the back cut stems should work more at higher lifts is this correct?
Eric Wiengarter got super videos about the heads you want to use. Put his name in and add racing. His stuff will pop-up... Good guy!!..
Wait.. where did the extra hp/trq come from? Just correct lobe separation of cam.
I'd like to know why you paint the top inside the head under the valve cover
Hey DV, I have a question. In the video "Race winning low buck 383 sbc build", you've instructed us to use a LSA of 107 for a flat tappet cam. In this video you say to use a LSA of 108. Could you please clairify? Thanks in advance, love your video's and knowledge sharing:)
Either one will work good .. 110*+ will leave HP on the table so to speak..
I think I missed something here was the externally balanced engines crankshaft and rotating assembly balanced or is the 400 Cid dampener better then the 8 in dampener that originally came with that engine I understand that each are externally balanced or is the recommendation due to the material used between the inner and outer dampener pieces
Bigger is better. DV DID SAY mill off the external weight to zero balance. 🤔
On the dual plane’s I was curious as if you had ever tested any of the old Weiand stealth mid rise dual planes? I was able to score one for virtually nothing and it seems to be a very nice piece.
Yeah!!.. those work pretty good!!..
Thanks for sharing.
Did you use a set of copper head gaskets when testing heads?
Hi David. I have been watching your videos on the sbc along with some other research, and i have a general idea of what i want/need to do. Would you be willing to do some emailing with me and help iron out my build?
Audio good
Yes, I heard it as far away as New Zealand. Hope it works in Middle America too... 🥝✔️
Why haven't you used screw in studs?
Didn't want to change them. The press in ones will be fine for the 20 minutes use they will get!
Glad somebody was getting some work done for you while you were filming. You need some apprentices 😎
The 461 casting has no eyebrow on the chamber, therefore have more compression.
So the right intake, camshaft & carburettors ALONE
can add a 500cc motorcycle engine to a stock Chevy v8. It only takes Knowing.
nice grinder sound🤣
Happy Thanksgiving Nabisco VITALIS ISKADARIAN
Love the knowledge share but Please get some insulation i cant concentrate on what your saying for the Dude porting heads in the background! WFO the Hole show!
108 lsa, narrow power band.
No audio
Max - problem your end!!
Audio is fine here
fixed
👍
👍👍👍👍
Omg, grinder noise.
I wouldn't rev any engine to 7500 rpm with powered metal rods.
Bloodviking
People wanna talk about hillbilly accents and how different we talk. People from the UK speak the same... In that they pronounce the first two letters of any word. If you ain't a hillbilly or from the UK try it yourself... Speak with emphasis on the very 2 first letters of any word, and report your results here
Beehive springs are better
Is that noise from someone porting in the background .? Very irritating !
Gonna have to get rid of the grinding in the background
The backgroind noise is hurting my ears, cant listen to video, good bye!
You jump back and forth in subject. You use constant filler as search for words.
You have a ton of distracting and interfering noise. You know engine beefing but really need to learn some communication skills.
This video is in the 99th percentile of quality. You are having a bad day
Only back cut the intake valve, not the exhaust. Doing the exhaust can increase reversion and destroy flow.
Come on David, doing a video in a operating shop doing business is just dumb. I made it less than 2 minutes before leaving this comment and then leaving. It's happened in other videos and I just don't understand it, you can't be so deaf that you can't hear it. You might be able to ignore it but I'm sure there are many more like me that find it EXTREMELY annoying. There has to be another room you could use or do the videos at home. I would be willing to bet that there are very few of your fans that aren't bothered by this and honestly it's just stupid that someone on your team hasn't brought this to your attention. I would be willing to say that absolutely nobody wants to try to make out what you are saying over the background noise of a die grinder!!!
Doesn't bother me at all. I'm used to tuning out extemporaneous noise and listening. 👍😎
Guess you've never ported heads or anything else for that matter
@@ryangulley2051 I have ported plenty of heads but have no idea what your comment has to do with anything I said? How would whether or not I have ported heads have ANYTHING to do with a person having enough brains to not make a video with a bunch of background noise that has nothing to do with the video itself??
Guess it's the type of person you are.
I'm not bothered by the noise either.
DV; I cannot stream this video. Other videos are working fine, I am not sure where he problem lies. v/r wh
Works now!
@@williamherring5441 Mine too. Glad it worked! 🥝✔️