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Make OVER 60 HP & lbs-ft more using stock 350 Chevy heads.

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  • Опубликовано: 15 авг 2024
  • In this, PowerTec 10, episode 20, DV tells how to bump up both power and torque while doing what constitutes little more than a regular rebuild. Yes, the intro shot says 60 hp, but follow these recomendations to the letter and the increase will likley be 80 - 85. So why quote 60? W ell that's just DV being conservative. Watch this and, even if you are a pro, you almost certainly will find some power moves you did not know!

Комментарии • 98

  • @terryheimerl8674
    @terryheimerl8674 Год назад +48

    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.

  • @brianyoung9014
    @brianyoung9014 Год назад +5

    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.

  • @paulbruno8327
    @paulbruno8327 Год назад +5

    Excellent DV🏁 and My Condolences for Marvin🙏🏻🏁

  • @deanstevenson6527
    @deanstevenson6527 Год назад +11

    🥝✔️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)

    • @DavidVizard
      @DavidVizard  Год назад +10

      Dean, Met both those guys when I was in Australia. Sharp cookies for sure!

    • @deanstevenson6527
      @deanstevenson6527 Год назад +3

      @@DavidVizard 😁👍🫡

    • @t.g.5832
      @t.g.5832 Год назад +1

      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?

    • @deanstevenson6527
      @deanstevenson6527 Год назад +1

      @@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.

  • @dannoyes4493
    @dannoyes4493 Год назад +3

    Thank you.
    Every video has unique perspectives I just don't see anywhere else.
    Well
    Done.

  • @johnelliott7375
    @johnelliott7375 Год назад +1

    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.

  • @Adam-np1qs
    @Adam-np1qs Год назад +7

    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.

  • @grantsgalaxy687
    @grantsgalaxy687 Год назад +3

    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

  • @hankclingingsmith8707
    @hankclingingsmith8707 Год назад +12

    ITS FUNNY HOW PEOPLE CAN WATCH A VIDEO FROM AN ACCOMPLISHED EXPERT, AND NOT BELIEVE THE FACTS AND ACCEPT

    • @DrewLSsix
      @DrewLSsix Год назад +1

      You shouldn't just believe the facts, you should verify the facts. Especially when he openly admits to misleading people to gain the advantage!

  • @MH-53E
    @MH-53E Год назад +5

    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.

    • @hotrodray6802
      @hotrodray6802 Год назад +1

      I'll bet you always have a radio blaring all day long..??

  • @garyspoering2463
    @garyspoering2463 Год назад

    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.

  • @timothyarnott3584
    @timothyarnott3584 Год назад +2

    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
      @hotrodray6802 Год назад +1

      PRW roller tips are great !!!

    • @timothyarnott3584
      @timothyarnott3584 Год назад +1

      @@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

  • @TheWarhoop
    @TheWarhoop Год назад

    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.

  • @matthewvarnam4302
    @matthewvarnam4302 Год назад +2

    Very nice valve spring pressor that is genius.

  • @tannerlippiatt8387
    @tannerlippiatt8387 Год назад +3

    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.

  • @antt5112
    @antt5112 Год назад +6

    I would be interested to see a bit more about this build and the results, especially any changes and improvements.

    • @DavidVizard
      @DavidVizard  Год назад +2

      That video was already about 6 mins over what we have set for a provisional limit!

    • @antt5112
      @antt5112 Год назад +2

      @@DavidVizard Hopefully another video to see how it progressed?

  • @johnelliott7375
    @johnelliott7375 Год назад +1

    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

  • @lynnrunningdeer7364
    @lynnrunningdeer7364 Год назад +1

    Hose down the fighting 😾😾🤣. Also thank you for sharing your experience🤗.

  • @razasasin
    @razasasin Год назад +2

    Could we get some more grinder in the background so we know it's a live shop?

  • @williamshoemaker3025
    @williamshoemaker3025 Год назад +5

    at the dentist office

  • @totensiebush
    @totensiebush Год назад +1

    It would be great to see links to the cams that you suggest.
    Thank you for all the wonderful info you provide.

  • @moregrip4185
    @moregrip4185 Год назад

    Thank you Mr Vizard! greatly appreciated!

  • @markwilson2360
    @markwilson2360 Год назад

    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.

  • @trxtech3010
    @trxtech3010 Год назад +2

    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.

  • @brentonk461
    @brentonk461 Год назад

    "Reprofile, the term I use is "Re-grind, or as you said Reprofile the camshaft. been doing it since I was a teenager.

  • @user-cg1jg9mi5c
    @user-cg1jg9mi5c 10 месяцев назад

    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 !

  • @ec9596
    @ec9596 Год назад +1

    Great stuff

  • @72blazer48
    @72blazer48 Год назад +3

    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.

  • @vestal2245
    @vestal2245 Год назад +2

    Audio good

    • @deanstevenson6527
      @deanstevenson6527 Год назад +2

      Yes, I heard it as far away as New Zealand. Hope it works in Middle America too... 🥝✔️

  • @waynelemieux5111
    @waynelemieux5111 Год назад +1

    Does painting it any Color other than flat black keep the temp. Of the block and components hotter?

  • @jeremysmith1339
    @jeremysmith1339 10 месяцев назад

    Any thoughts sir on the mcfarland torque link intake manifold?

  • @bassettraceengines
    @bassettraceengines Год назад

    Thanks for sharing.

  • @baims8367
    @baims8367 11 месяцев назад

    @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 !!

  • @joshuadille5005
    @joshuadille5005 Год назад

    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!!

  • @bcbloc02
    @bcbloc02 Год назад

    Glad somebody was getting some work done for you while you were filming. You need some apprentices 😎

  • @theguy9234
    @theguy9234 11 месяцев назад

    Wait.. where did the extra hp/trq come from? Just correct lobe separation of cam.

  • @yolandalindsay8368
    @yolandalindsay8368 Год назад

    So the right intake, camshaft & carburettors ALONE
    can add a 500cc motorcycle engine to a stock Chevy v8. It only takes Knowing.

  • @mariusfridlund55
    @mariusfridlund55 Год назад

    nice grinder sound🤣

  • @ronshay6838
    @ronshay6838 Год назад

    I'd like to know why you paint the top inside the head under the valve cover

  • @shane9883
    @shane9883 Год назад +1

    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

    • @hotrodray6802
      @hotrodray6802 Год назад

      Bigger is better. DV DID SAY mill off the external weight to zero balance. 🤔

  • @peggyparrow2059
    @peggyparrow2059 Год назад

    The 461 casting has no eyebrow on the chamber, therefore have more compression.

  • @brianbrigg57
    @brianbrigg57 Год назад +1

    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?

    • @danielmauter1737
      @danielmauter1737 11 месяцев назад +1

      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!!..

  • @brokentoolgarage8609
    @brokentoolgarage8609 Год назад

    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?

  • @pmd7771969
    @pmd7771969 Год назад

    108 lsa, narrow power band.

  • @joe-hp4nk
    @joe-hp4nk Год назад +2

    Why haven't you used screw in studs?

    • @DavidVizard
      @DavidVizard  Год назад +4

      Didn't want to change them. The press in ones will be fine for the 20 minutes use they will get!

  • @baneufeld
    @baneufeld Год назад

    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:)

    • @danielmauter1737
      @danielmauter1737 11 месяцев назад

      Either one will work good .. 110*+ will leave HP on the table so to speak..

  • @daminderosier3129
    @daminderosier3129 8 месяцев назад

    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?

  • @Xxjoker21xX
    @Xxjoker21xX Год назад

    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!

  • @joshcampbell2503
    @joshcampbell2503 Год назад

    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.

  • @johnshackelford6965
    @johnshackelford6965 Год назад +1

    Happy Thanksgiving Nabisco VITALIS ISKADARIAN

  • @darrinstone49
    @darrinstone49 Год назад

    Did you use a set of copper head gaskets when testing heads?

  • @maxsav007
    @maxsav007 Год назад +2

    No audio

  • @pmd7771969
    @pmd7771969 Год назад

    I wouldn't rev any engine to 7500 rpm with powered metal rods.
    Bloodviking

  • @pmd7771969
    @pmd7771969 Год назад

    Omg, grinder noise.

  • @chevyfan82
    @chevyfan82 Год назад

    👍

  • @theshed8802
    @theshed8802 Год назад

    👍👍👍👍

  • @pmd7771969
    @pmd7771969 Год назад

    Beehive springs are better

  • @williamstamper442
    @williamstamper442 Год назад +1

    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

  • @hoost3056
    @hoost3056 Год назад +2

    Gonna have to get rid of the grinding in the background

  • @peggyparrow2059
    @peggyparrow2059 Год назад

    Is that noise from someone porting in the background .? Very irritating !

  • @user-zu2ed6ye5w
    @user-zu2ed6ye5w Месяц назад

    The backgroind noise is hurting my ears, cant listen to video, good bye!

  • @senatorjosephmccarthy2720
    @senatorjosephmccarthy2720 Год назад +1

    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.

    • @mikem5475
      @mikem5475 Год назад +1

      This video is in the 99th percentile of quality. You are having a bad day

  • @johnnyyuma9326
    @johnnyyuma9326 Год назад

    Only back cut the intake valve, not the exhaust. Doing the exhaust can increase reversion and destroy flow.

  • @crazyjon1tire854
    @crazyjon1tire854 Год назад

    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!!!

    • @hotrodray6802
      @hotrodray6802 Год назад +3

      Doesn't bother me at all. I'm used to tuning out extemporaneous noise and listening. 👍😎

    • @ryangulley2051
      @ryangulley2051 Год назад +1

      Guess you've never ported heads or anything else for that matter

    • @crazyjon1tire854
      @crazyjon1tire854 Год назад +2

      @@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??

    • @theguy9234
      @theguy9234 Год назад

      Guess it's the type of person you are.
      I'm not bothered by the noise either.

  • @williamherring5441
    @williamherring5441 Год назад +3

    DV; I cannot stream this video. Other videos are working fine, I am not sure where he problem lies. v/r wh