Intake & exhaust misleading tech BS bashing.

In this, edition 121 of PowerTec 10 DV highlights some of the less-than-helpful tech put out by some very creditable 'big time' KZbin channels. This includes far from optimal ram stack design even among top tier machines such as F1, CanAm and a whole load of others that you would have thought lead the way in what appears to be such a simple area of design.
All those fancy formulas for calculating the diameter of the header primary pipe - well forget those because half the time they fail to get the right size. Here DV has, in his typical style, done your homework for you.
But this video is much more than that even to the pint of revealing the existence of two SECRET engine projects that will be radically different to anything seen before - and there is more! Just watch and see for yourself.

[@GMengineguy]

Dear professor Vizard, I am an old school guy playing catch up and refresh and likewise have brain issues as a result of oxygen defecit due to extended surgeries, so I completely identify with your situation and gives me inspiration and hope. My professional experience was a master utilities mechanic at was at the time the largest single steel making facility in the world but had to retire in my 30's due to the injuries. I discovered your site last summer while doing an upgrade-restore to an 84 c4 removing the crossfire system and doing an engine refresh with Jegs new vortec heads looking for info on upgrading them. I was impressed immediately with your knowledge and continued to watch more and more of your videos. I went through the process of recovering my long lost password just so I could like and subscribe to your channel. I noticed quite an improvement in the editing especially as far as the sound quality is concerned. One thing i would like to mention however are the jagged areas around the spark plug in the combustion chambers and what affects they have if any and how to improve that if possible. Thank you beyond measure Professor! Sincerely, Greg

[@pakistaniraveasylum1396]

Have you ever tried hyperbaric oxygen therapy?

[@robertwest3093]

I definitely recommend all of DV's books. They have helped me immensely over the last thirty plus years.

[@laszlototh5956]

I was so pleased when Greg mentioned DV on his channel. It is even better to hear that DV also knows Greg. They are both exceptional!

[@DesignDreamsLLC]

David, thanks for the introduction. Always a good time conspiring with you! We'll see if we can give this bunch some more food for thought! The other David aka 'Woody' Woodruff

[@jamielombardo5292]

Mr. Visard, I've been reading your books and following you 40 years. I never get tired of listening to your technical information. Thank you sir.

[@funfun8095]

And you don't know how to spell his last name?? SMH

[@davidlashlee9717]

Great video David. I want to remind you, the World is anxiously waiting for your SBF book!

[@ThomasJablonowski-p1u]

I too am interested with the outcome of mission impossible. I just pulled my 318, low compression, 4bbl TQ, built to NHRA Stock eliminator specs, off the dyno and made 325HP. Power fell off due to inadequate valve springs. I was hoping for the finale of the project prior to my looking for addition valve train weight reduction( as per your channel recommendations). Thanks for all your work. Andy is lucky by having you as a neighbor.

[@rayowens4355]

So much to look forward to! Poly quad, tudo mods, nitrous can't wait! Thanks again for all you do! May God bless you throughout this new year!

[@daledavies2334]

Re: hood scoops. The designers of the P-51Mustang fighter did a lot of research for the radiator scoop and ducting, along with the hot air exit location and temp control door. They actually picked up thrust by proper design.

[@libertyjusticeforall6754]

Thank you again david for such good informative videos. What I don't understand is why can't company's cast heads that already has those intake and combustion chamber shapes?

[@mikedeal8659]

Thanks David. I really enjoy your videos, and have tired to read as much of the articles and books that you have written. All really good stuff and no BS. Regards

[@46M111]

Keep up the good work DV.

[@CHubbs376]

DV, you're going to be very pleased with HPTuners. I've been using it for nearly 20 years on GM stuff, and it's an excellent tuning platform. There's a bit of a learning curve with figuring out how the OEM stuff works, which isn't always very intuitive, but I'm sure it's nothing you can't handle!

[@mikecondoluci53]

THANK YOU DAVID

[@michaelblacktree]

I'm one of those 4-valve fans. Looking forward to the PolyQuad video!

[@mikediamond1522]

DV I've been following you for years and all your articles in Hot Rod. I also have the majority of your books, which are all dead on. You're just as good now as back then, Praise the Lord. If you haven't heard of him, check out Steve Morris Racing. Large turbos, huge HP. Let us know as usual, what ya think. God Bless Mike

[@sydneychase780]

David I was unsubscribed for the 2md time, remind folks to check that. The new projects exite me. I wish my son would watch you he keeps buying junk for his Ecoboost focus its developed a flat spot. I have 2 sbc to build with your instructions in mind, one is a 010 block for real. Got no budget but your methods will give results. Been aware of you for decades. God Bless you and Andy.

[@ElPants21]

Looking forward to more polyquad content. Have some old Ford 4.6 dohc B heads id like to give that treatment

[@shaunvduke]

Just found this channel. So pleased! Still remember getting the book on building and modifying ford's pinto engine. 35 years ago as a 19 year old. Glad your still here producing top quality content. Made my day😊

[@dalewarriorofthesea3998]

Sounds action packed DV Looking forward to it

[@frankglasgow]

Thank you David. I may subscribed. And I always give you a thumbs up. Have learned a lot watching you series.

[@markroyer8065]

David's BBC book helped me build a successful 454. I should of put a stoker crank in it and followed his 525 build. Love all your tech videos. 👍👍👍👍👍

[@christopherc3017]

I’ve been trying to find more information on the 4.5 stroke in a stock mark iv

[@gibbsey9579]

You have outlined some brilliant projects, I can hardly wait...

[@SandraOrminski]

mr vizard time is never taken up and knowlege is power. thank you for all of the knowlege through the years. i always tune in.

[@lautburns4829]

Damn interesting,David. Can’t wait for more!

[@daledavies2334]

Corner marshalled at Edmonton International Speedway on corner 1 for CanAm, Trans Am and Formula Atlantic. Those Group Seven Sports Racing cars were awesome to watch. At the end of the 3/4 mile straight they were coming at us at 200+ MPH as measured by the Exmonton Police Service radar.

[@bmmarshall79]

Sounds like 2024 is going to be very interesting David.

[@stevecobratei8538]

Thank you for the invaluable information you give us. I have worked of vehicles for over 50 years. The main thing I not😅is you never stop learning and thanks to you we are learning to correct info

[@johnnienitro6812]

Looking forward to seeing your info on ram stack design David. Has always been a rats nest of information at least to me. Thanks to all involved!

[@hallwest9650]

I’ve heard several small in subscriber numbers car channels mentioned David in a positive light and was very impressed and thankful

[@jameslefebvre2090]

David I bought how to build horsepower volumes one and two. 😊 great stuff 👏

[@brentscott364]

Always informative information. 👍 David I think one thing to consider to grow your audience more is to consider doing a generic porting video on the modern day LS3 and LT direct injection heads. I think you're missing out on the the primary age group of 20 - 35 year old hotroding community. I know myself that all your previous content will apply to next generation engines, but the newer generation won't see the correlation between the new and old. Unless you demonstrate this on the newer trending LS / LT Cylinder Heads. Anyways hope this suggestion is taken in kind regards. Many Many Thanks for all you've done for the Hot Rodding Community!

[@robertryan2228]

It sonds like you have some great stuff coming up DV, im really looking forward to the Ecoboost Mustang related ones. Keep up the great work

[@ThomasGellos-e6v]

Always looking forward to the next video David uploads. any chance of you and Andy doing anything on the 3800 series buick V6? Thank you

[@gdaytrees4728]

Richard Holdener does a large amount of dyno tests on the 3800. On KZbin. Well worth watching.

[@79beans347]

Man you have a lot of good things coming up and im still wanting a potentiality powerful set of heads for my 347 that will hopefully put 500hp to the ground, I don't care how much work they need , just a good foundation to start with and the cheaper the better There is a lot of good stuff coming up on your channel , Im excited about it and it will probably have me doing more upgrades to my car trying to get all the NA power I can out of it

[@b.snoodleman5864]

Hi Guys, glad to see the poly-quad project is moving forward. I was wondering what cylinder head you did your initial testing on and what it did on the dyno compared to stock? Thanks

[@jimlathrop8603]

Thanks again. Not an ecoboost guy but can still use all the info. Those exhaust ports look strange, someone please tell me that's a cast in manifold and not for 1 cylinder! Can't wait for the detailed poly-quad info!

[@lb9gta307]

Yeah, the manifold is integrated into the head casting. Seems to be pretty popular with the OEs these days.

[@TheAnonymous1one]

That’s crazy you know Greg I watch and follow his aircraft channel. Its amazing he is methodical and thorough

[@poncethegayboi]

Flowing his guidelines has never done me wrong. Ever.

[@philr300]

Awesome. I'm looking forward to the up-coming videos.

[@kennymcquinkiss8292]

I would personally like to thank you so much for all the information that you're giving. I'm not at the stage that I'm able to spend a lot of money to make things work better but I still like to receive the knowledge of How It's done. I have watched many of your videos and will continue to do so

[@lcxu1051]

Thank you for your knowledge and time. The cold air intake should probably work best if the intake is approximately 20 to 30cm off the ground. I say this because in the military you are tought that the air is coolest at that height above the ground. So set up the air intake at that height and see if the teacking for survival is true and correct. If so it will make a difference with the air temp intake for a car.

[@StefanRügamer]

that was a great viedeo with so much myth busting ! GREAT ! my favourite the venturis.

[@jocelynattard4946]

Big thanks as always

[@donniechurch2666]

I just recently started watching your videos. I love the info that you give

[@jamesandannschmitt6835]

Thank you again David. Has the Mopar project impossible been completed? I missed it if it has.

[@lb9gta307]

I missed it too if it was

[@mikemakuh5319]

"Oh Boy"! Do i miss Popular Hot rodding!!! I have saved all of your articles from those magizines. This crap on the news stands today are not worth hanging in the outhouse.

[@shawnwieser7101]

Magazine was hot rod not popular hot rodding, i just bought it .... still some available on ebay... Great job David..... I personally don't think you need to justify your self at the beginning of every video... your tech speaks for itself

[@keithtobin5369]

DV. THANK YOU. Keep up the great work

[@JaapGrootveld]

Great stuff, Tanks.

[@jasontaggart6252]

Outstanding ❤👍🇺🇸

[@jeppakongur]

Excited for the next shows 🎉🎉🎉

[@marktaylor1498]

Is their a upcoming update on Project Mission Impossible 318 ?

[@christophercullen1236]

What happened to 318 project. Or did I miss some videos. Kit from down under

[@deangiacopassi1951]

I enjoy your videos. I'm trying to learn. Thanks

[@johnflett2531]

YES! More info on aerodynamics and hood scoops please!

[@Fordcertian]

Sounds good, can't wait!

[@ronosga4391]

A review of the carb cheater system would be very interesting.

[@alessandroghizzo972]

Fantastico ! Non vedo l'ora di vedere questi nuovi video. Tutti, ma in particolare mi interessano , RAM stacks, air scoop, filters, 4quad heads, exhaust system. Grazie, grazie, grazie

[@johnsalvaterra3116]

Thanks! DV, I'll be watching, interesting topics

[@flinch622]

Always loved the can am cars.

[@danielllewellyn5720]

Leave it to Ford to re invent the twin scroll turbo. Thank you for these videos you put out.

[@waltari51]

David you are so good

[@davidnance-d3n]

thanks DV# 1!!!!!!!!!!!!!

[@gabrieldimarco9646]

Looking forward to your thoughts about the ITB on the can-am car.

[@RindosRides]

Lol and the K&N filter.

[@r1learner178]

Looking forward to this year.

[@jameswhitesell3076]

Ive got a k&n blackhawk cold air intake on my 2019 challenger. It has an opening in the head light and also from the hood. My intake temps range between 0-10 degrees from ambient. The colder it is outside, the closer to ambient it is.

[@derrelcarter9401]

Roger Helgesen (The Dr) claimed the same thing, Almost as much HP as a Victor Jr & almost as much Torque as a RPM Air Gap, with the Weiand 7525 you folks extended the runners and runner volumes on? I bought three of them, but he passed before doing one for me?

[@NotSure723]

Do you know how to contact Roger Helgesen? I need a flow bench calibration plate.

[@troymecey]

​@@NotSure723he passed away some time ago.

[@derrelcarter9401]

@@NotSure723, Sadly Roger passed 4 or 5 years ago.

[@NotSure723]

@@derrelcarter9401 Bummer

[@johnmurraycompton569]

Looking forward to seeing the Mustang "CAI" results and the exhaust calculations.

[@itsav6181]

Great content as usual! I can put you in contact with someone at HP Tuners. Very talented tuner as well

[@yolocah]

can't wait for the next sale date

[@biastv1234]

Nearly 50000 subs, well done

[@funkiwikid6106]

Can't wait to see all you can give about aerodynamics ... bring it on.

[@terrysmith8133]

will be waiting for the results

[@johnnymula2305]

My 09 BMW 128i has a Cold Air Intake using a K&N air filter. It has a heat block off plate. Which im sure helps to a point. But more important is the hood. Its a Seibon carbon fiber hood with vents. The vents cool down the engine bay drastically. Which im sure is the reason for the benefit of the cold air intake. Since its actually pulling in air from a drastically cooled engine bay.

[@mackspears8771]

Did the 318 mission imposible turn out to truly be imposible? If so that is unfortunate.

[@craigchiddo2794]

I heard from Charlie that they are working on it and it has gone back to Tony's idea of factory parts but there is a kicker they are thinking about doing an aftermarket parts build as well

[@servediocylinderheads]

​@@craigchiddo2794It will multiple phases. Stock to aftermarket.

[@bob762231]

I'm a 4 valve fan, but my 4 valve is near the beginning of its introduction. It is a 1975 Chevrolet Cosworth Vega Twin Cam, as someone who has a very thin wallet 😞 I enjoy watching your videos to see if any of the information you deliver would help me in my quest for more power😉 I've done a few things to make better use of the lack of power I have (shedding weight).. but hopefully some day I'd like to be able to make more power, possibly 180-200 na HP.... Have you ever run across one of these cars? What are your thoughts?

[@jimlathrop8603]

I have never worked on the cosworth head, but from what I know there's a lot more power to be gotten out of them. With plenty of metal for porting & valve work. They were "detuned" for production cars. Also the engines were down sized to 2.0L for race class. I think the block is the same as standard 2.3L, thereby interchangeable. The extra 300cc would be worth some more power as well. I got one....

[@bob762231]

@@jimlathrop8603 I have owned several Cosworth Vegas since 94 so I'm quite "basically" familiar with them,,the only difference between the 2.3l block and the2.0l block that cam in the Cosworth is the Cosworth has a crankcase vent tube that connects to the air filter. I gasket matched the intake and cleaned uap the rough factory machining on the intake and head but without putting it on a Dyno I don't know if any difference was made🤷,, several people in the CVOA have done extensive work on them. High compression pistons,cams, Webber's, but it would be quite interesting to see if making significantly higher pump gas compression 11:1/12:1 or higher is doable and if the crank could be drilled to hollow the rod ends to lighten the rotating assembly and help with vibration

[@graceenginedevelopments]

Great video David

[@johncollins5552]

Did Professor Woodruffs Dad invent the Woodruff key as used often to hold gears in place on a crak or camshaft? Awesome as the Americans like to say😂❤

[@erichlausch9886]

👍👍👍👍👍👍

[@Divisible_By_0]

I love your videos, so much information packed into each one and well laid out. I have a question regarding your 128 cam formula and would like some information on using it and if it works for 4 cylinder engines.

[@rotaxtwin]

Its been a while since i grabbed a car magazine but it does seem like the objectivity has taken a turn for the worse - and it wasnt fantastic to start with.

[@derrelcarter9401]

I have a question on the Poly Quad modification: With it work in a 4 valves diesel applications as well? Specificaly, the VW/Audi 2.0L & 3.0L stuff does not have a combistion chamber in the cylinder heads, just in the piston?

[@JeffKopis]

David, how can you start so many NEW projects, without finishing an OLD project, by the name of Mission Impossible?? Did it turn out to be "impossible"??

[@justinschmidt9180]

I really like your videos great work . Is the 318 project on the shelf or did i miss the out come . Do you have a small block ford book

[@rightsidelanechoice7702]

I like the shot of Silverstone

[@needmoreboost6369]

Mustang only? I’ve got some boosted gm sixes That air temp test is straight forward enough for me to do! I live near 110kmh highway and I’ve got an air temp gauge with two probes, they’re cheap and relatively sensitive and can be used for multiple tasks! I’ve got it mounted in my charge pipe before and after the intercooler but can easily relocate it or fit it to my other car which still has the oem intake, I’ll have a tinker with it tonight after it cools down. I’m building an rc plane at the moment so it’s about priority lol

[@michaelhargarten5118]

Can't wait to see the results of how much time you can shave off your 1/8th mile E/T after porting the cylinder head and stock turbo on the Ecoboost Mustang.

[@hankclingingsmith8707]

Good job

[@jimbefit3073]

David, how about a physical parts kit, or even a technical knowledge kit that will allow us to build a super high mpg engine? OR JUST a high mpg engi engine AS CHEAP AS POSSIBLE!!! PLEASE? Many may not have big, or avg income, but it sure could help *** thousands live a better life. I may not have much, but it doesn't mean i cant drive. @ 18yo I taught myself how to throw a car into a complete 360 deg spin from 65mph - and keep driving. A progressivy increasing left, right MAX LEFT & E-BRAKE, STEER RIGHT& JAM THE FOOTbrake to bring the front end around while steering left , let out the clutch 2nd gear (you've scrubbed off 40 mph,) as you knew you would and keep going. But Now I JUST WANT MPG's.!!!

[@JC-gw3yo]

Love to see how the air temps come out on the Mustang

[@billymanilli]

That old Can Am car reminds me of the old 1972 Aurora Super II ho slot car kits... They were supposed to be "super performance" compared to a regular AFX but they didn't work well at all, in reality...

[@billbraski2175]

David tooting his own horn again as usual.

[@TinkerinWithTim]

Interested to see the cold air intake/exhaust bits!! Thank you!

[@antilaw9911]

How much compression is too much compression for a performance engine? Obviously if you think in mechanical terms, you could keep building compression until it starts working against the reciprocating force and starts slowing down the motion. Example: diesel engines. Why I've seen builds with low compression, but still making big power from big cam specs and free breathing heads and intake etc. The old "oh you can't run that big cam with only 8.1 compression ratio ". Oh really? Wanna see it? Cubic inches and air flo make more power than just a couple increments of compression ration. So im tired of these camshaft reference catalogs saying you need this minimum amount of compression for specific cam.

[@MrTheHillfolk]

Diesels are a little bit of a different beast, but I've heard some of the race guys say lower the compression if you're going with all the turbos and all the power. You need enough to light it but not too much they say. So yeah I've heard the same as you. The old VW idi 1.6 diesel had like 23.5:1. I've got a 1.9 lower end with a 1.6,(they didn't do that from factory) and supposedly those get up around 25:1. Maybe there's some diesels with more but that's quite a bit. It definitely seems to fire off easier in the cold than a 1.6, but there's a lot of variables there to say it's from more compression. Eh I just think it's kinda neat that it's like 3x more than a typical gas engine. Who needs the foot brake ? Not me ,let off the gas and like 30' from a light you need em,I usually keep the brake pedal tapped enough for the lights to come on if someone is behind me because it wants to stop by itself 😂

[@andredesousa96]

All compression ratios work against the reciprocating motion of the piston, be them 8.0 or 18.0. I can’t really answer your initial question because I don’t have the real world experience with it and I’m also just starting out learning about motors but I will give some ideas that came to my kind: i) if we run such high compression that it provokes a lot of decceleration on the piston on the upwads (compression stroke) stroke, then a super high-tech fuel is needed to avoid knock and pre-ignition. ii) if it is such that decelerates the piston a lot then huge forces Will be exerted on the piston, rings, rods, etc. iii) with such high compression maybe ignition would have to be retarded too much? So much maybe that peak pressure on the cylinder would happen too late on the expansion stroke? What do you think about these? As I said I know I didn’t specifically answer your question but I really just have these thoughts going through my head and I dont have the knowledge for a straight up answer.

[@АлексейСурмач-ы1ю]

Д. В. Всегда лучший!

[@victorromero4572]

💯💯💯

[@richardmoerke9329]

I’m trying to find out if you have dropped the 318 program? I like hearing about the other programs. So the thing is have not seen anything on your cam program either.

[@bb400dart2]

Yes up date please 🙏

[@79beans347]

Here's another comment: DV please don't for;get about those heads we talked about and Terry asked u about for me a lil bit back, im swapping cam and heads will be next

[@johncollins5552]

Is there a Vizard book for my aircooled bug engine my dear fellow, good health to you Sir.

[@poncethegayboi]

I remember reading his books as a teen. And reading and learning why a 350ci engine and a 350ci NASCAR motor made wayyyy more hp. Resonate tuning. Pressure wave tuning that the exhaust has more of an impact on induction than the piston going down. Air has mass therefore velocity. David should go back to the basics and explain the physics of an induction engine and what is actually happening. Ohh piston goes down and draws air in. Noooo nooo noo. So for street enginens. Maximize the overlap period. Cam selection, cylinder head flow.. and keep in mind the valve hits two limits twice... When it opens on the ramp and when it closes on the ramp.