No holds barred performance criticisms'

In this, episode 137 of PowerTec 10 DV goes into top gear criticizing mode. Here he responds to ill founded statements about his dyno testing on camshafts, the industry failure to even closely optimize cold air boxes, 337 Speed’s multiple copying of DV test results without credit, Darren Morgans KZbin fails and Lake Speed Jnr’s ZDDP oil tests. The links you need to see for yourself the claims made are as below.
Lake Speed kzbin.info/www/bejne/m6Pbm4OfmNWMr9k
Darren Morgan kzbin.info/www/bejne/nGm7eGyKbdtgpMk
337 Speed min 3.30 kzbin.info/www/bejne/hnyaiX6Mbctshs0

[@mikeg4163]

Watched all this with both of you guys….just stop! CALL HIM AND TALK…. THIS DIRTY LAUNDRY ON KZbin IS NO GOOD.

[@DavidVizard]

I have asked Eric if it would be alright if I called but no reply as yet.Why don't you ask him if he minds if I call him?

[@tomserna6722]

I think the thing the head guy took issue with, is you said Warren Johnson doesn't have a sophisticated Flowbench program. Warren said himself in his Total Seal Interview that he believes the flowbench doesnt tell the entire story, and Warren is about as hard headed as they come , and you would do better trying to make water run uphill than change his mind. When an engine is running the ports are pulsing air, it's not a constant draft. John Kaase demonstrated this with his clear plexiglass intake with removable screw caps, so that you can stick your finger in and actually FEEL the pulsing for yourself.

[@patrickoleary6379]

Yes

[@racerd9669]

Yes, D V had 98 wins in pro stock.

[@DavidVizard]

@@racerd9669 I'm not sure where you got that from but it is not correct. Sorry.

[@DavidVizard]

@@racerd9669 I'm not sure where you got that from but it is not correct. Sorry.

[@JeremyFrazelle-or1mt]

Darrin Morgan and George Bryce are a wealth of info.

[@MasterWitchDoctor]

George Bryce? hahahahahahahaha hes no Byron Hines or Russ Collins!!!

[@jackwillson8099]

George is smart but he's no Warren Johnson or David vizard or Darren Morgan not even close

[@JeremyFrazelle-or1mt]

Darren thinks enough of him to recommend his videos. Pretty humble guy coming from a serious racing back ground.

[@JeremyFrazelle-or1mt]

Btw I don’t know how Warren Johnson gets thrown around so much . Yes he’s an accomplished racer but how many of us really run a pro stock engine on the street …. It’s further from almost anything most people have in their car.

[@jamesford2942]

I've seen many "cold air intakes" that are really hot air intakes. The factory usually pulls outside air from the bottom of the air box. A lot of these intake systems have high flow filter but pull air from under the hood or through the radiator.

[@rotorr22]

I have found Lake's vids to be very interesting and I enjoy his delivery, which is ego free. Darin Morgan is a flipping genious and I find myself having to watch one of his vids multiple times to assimilate most of the points he is making. He is incredibly generous with his experience. Agree with David on his evaluation of both men.

[@4speed3pedals]

I hope you can get the video on exhaust sizing out soon. I am always puzzled by the size I need, it is a crap shoot just using catalogues and speed shops. Thanks David and company.

[@bena6852]

Where is the 318?

[@joshiek7839]

stolen

[@dondotterer24]

Warren Johnson .didn't use a flowbench as much as you might think either. He said he never seen a flowbench strapped to a racing seat go down the track. He did things and tested it. Like you said DV he was looking for HP and torque just the way he did camshafts. But I bet he went through alot of them.

[@jamescherney5874]

I was about to order some oil extreme for my 17 Vette until I saw Lake' s video. What also concerns me is that Oil extreme is not Dexos certified.

[@bigblock406ta]

Sorry Dave he said dyno testing not cam testing. So you’re inflating this issue.

[@DavidVizard]

I said cam testing and that was the subject of discussion.

[@rageracing6435]

Thank you for recommending Darin Morgan’s channel. Fantastic information! Definitely learned stuff as I do from you as well, and I have been studying this stuff since 1992 and professionally since 1997 when I worked for Roush Racing. Still learning. Still reminded by guys like you and Darin how little I actually know.

[@scottersandman6408]

I just found an article by DV called Port Volume Explained Why bigger isn't always better. this is in May 2003 Speedway Illustrated WOW!

[@seancollins9745]

Until you work with forced induction engines, then port volume is actually massively helpful, with ultra high boost engines go8ng sonic is a huge impediment to power

[@ACDGarage_Racing]

DV, I know exactly who the cylinder head porter that you speak of is, his initials are, Cough Cough--> EW😉... He made a video about a year ago ranting & throwing a fit about my first cam video, that was the video that i also exposed Brian Tooley, you commented on that video and told me that you thought it was "a cool presentation and said you wished you were that smooth" lol, that video now has near 153,000 views and just keeps climbing, that video has gotten alot of attention & has been a huge sucess. I really do appreciate that comment you left, that comment and the 2 other comments/complements you have given me gave me more motivation & inspiration to continue to push threw my permanent progressive disability's and put out more videos sharing my knowledge about the physics & dynamics of engines, cylinder heads, valve event timing & dynamics, gas dynamics, pressure waves, pressure differentials, resonance, etc, etc, etc... After my second cam video which just further solidified everything i said in the first video Mr over opinionated head porter EW didnt have a single thing to say.. I still have a whole lot more indepth empirical information/proof and indepth explanations to add to bolth those cam videos and alot of its coming soon... The over opinionated head porter EW who you speak of is very good at what he does and i do have respect for him but he lacks cognative awareness and high order metacognative ability, EW is unaware of his cognatively bias afflictions which blindly narrows his perception of the form of reality he wants to accept or is willing to accept, it also negatively effects his ability to achive acurate intrapersonal & interpersonal perception, all of which are required and very important but the most important factor is one must obtain or be gifted with a specific level of higher metacognative ability which is really rare, all of which are nessary factors and are keys to to obtain & maintain the sustainability of true knowledge & wisdom, This statment is absolutely qualitive empirical neuropsychological and or quantum neurobiological based fact!!! Ive been working on a video for awhile about the empirical reality of valve event timing, optimal valve event timing, gas dynamics, volumetric efficiency, with a simplified explanation of the ideal gas law, volumetric efficiency, the otto cycle and some other Thermodynamics, of course there will diagrams and dyno proof to back up everything i say, this upcoming video will shut alot of these guys up and make them think about & understand things they have never thought about or understood before, in the video i advocate for you because the knowledge i share helps back your empirical method from an independent & unbias source and just so happens to prove that you are absolutely correct sir💯🫡.. This upcoming video is gonna be as they say "a banger" and will be very successful, it is about 2 hours long and i make it very clear with proof that my knowledge, wisdom and experence i share only deals in Quantitative, Qualitive and Empiricaly proven information aka true knowledge within the reality we live in, i dont deal in opinions, opinions are Anecdotal information and opinions are inherently subjective due to perception & cognative bias which leads to inconsistencies, inaccuracies and falisies, opinions lack the rigor, precision and reproducibility of the empirical knowledge that comes from the rigors & specifics of scientific method... The video im currently working on should hopefully be done soon, and if you havent seen my last video you should check it out, it also independently proves without bias that your correct... Take Care DV, I wish you good health my friend🙏🏻... ~ Adam ~ Cattledog Garage & Racing...

[@autonomous_collective]

David, Lake tested your "Oil Extreme" addative in that video and said DONT ADD IT to your oil. Did you see that?! Therefore, we shouldn't buy or use "oil extreme".

[@Link-we8so]

Well he said don't put it in a direct injection engine. Not necessarily any engine.

[@daledavies2334]

As with most things we deal with automotive wise, chemistry is a complex topic. If you add or subtract a bit of one element or chemical, how does that affect the balance and interaction in the product, whether grease, oil, coolant or the fuel. If an oil is formulated to perform well for an application out of the can, adding something else may throw it off maximum performance. Without intimate knowledge of the subject we are better to listen to someone who does know the subject.

[@autonomous_collective]

@@daledavies2334 No shit, thats why I want David's opinion. I dont believe David watch the entire video and/or knows of Lake's comment. Try and stay on track, Dale.

[@seancollins9745]

​@@Link-we8soI've torn diwn dozens of lspi damaged di engine's, all of them had insane levels of carbon buildup and would have benefited from increase dispersant and detergent action in the oil as well as regular maintenance. Our shop has hundreds of direct injected turbo BMWs running mobile1 and otherbhigh calcium oils with 200k miles or more ajd no lspi damage vut our customers do the maintenance, clean the vakves, change the oil and use quality lubricant

[@TheProchargedmopar]

What about Rev X anti friction additive that Steve Morris is selling?

[@mcintyretyler89]

Erics a smart man not so sure id bash the guy, hiding behind a camera. If you have a difference of opinion can nobody simply talk about their differences without hostility. Its a bad look for everyone involved. But maybe thats just the way of the world this day and age

[@jackwillson8099]

Smart no ,just a lot of Experience , But he's a hypocrite too

[@trailerparkcryptoking5213]

What is Eric’s story? Is he wealthy and ports heads to have something to do or does he make a lot of money porting heads? I don’t know his finances but it looks like there’s more money there than the average Joe....

[@espenschjelderup426]

​@@trailerparkcryptoking5213 Eric have a video from a good while back where he explained a bit about his finances. From what I remember he's by no means rich. But I think he is well off enough. But for all the hours he put in I don't think he earns very much an hour.

[@trailerparkcryptoking5213]

@@espenschjelderup426 He has a nice shop and equipment and a drag truck...none of that stuff is cheap. I typically watch his videos and he shares good info. Him and Vizard got under each other’s skin and both made videos about the other. They should have just left it all alone...I ain’t picking sides, will still watch both of them....

[@espenschjelderup426]

@@trailerparkcryptoking5213 I agree. I guess they don't have compatible personalities.

[@brackelbuilt]

"THE TRUTH IS NOT ALWAYS BEAUTIFUL... NOR BEAUTIFUL WORDS THE TRUTH." Keep doing what you do sir. Your guidance and experience is unparalleled. Your sharing is GREATLY APPRECIATED!

[@oscaracme]

As a journalist first, you know that controversy sells.

[@AB-80X]

Yep. DV is full of himself

[@oscaracme]

@@AB-80X "Has-been that barely was" comes to mind.

[@portedhead7164]

Thank you for the links David. Shows you are the real deal by giving credit to others. Jeff Thompson

[@jimjohnson3357]

I don't give a shi! who has done the most dyno testing. I like to hear everyones results and I will make my own decision as to what I will do with this information. Nuff said.

[@DavidVizard]

You sure sound like a guy that values function and results!

[@user-gn8sj6ic5i]

I’m Gona need some help on 383 cam choice I’m thinking 106 Lsa but lift valve springs 650 max 202 valves 160 exhaust flat top 2 valve releaf 190 volume 64 cc hydraulic roller 11-1 comp like to use comp or your best choice

[@trailerparkcryptoking5213]

Eric Weingartner uploaded a video 2-3 days ago about this fiasco. He was super pissed too.... It’s just two separate trains of thought. Nothing to freak out over. They both know their business pretty well and do good at what they do.....just agree to disagree!

[@DavidVizard]

No need to agree to disagree. If Eric comes over to my shop most of his contradictions to my claims will disappear.

[@chrischarles9218]

Yes, I'm subscribed to Lake Speed Jr. channel and even contacted him by email a couple times.

[@phildo39645]

You’re a Legend David, thanks for sharing your knowledge with all of us!

[@bcbloc02]

David I am going to be working on setting up my Clayton Dynos soon and would love to know more about making them more accurate and precise. When is a good time to call and talk?

[@approachingtarget.4503]

Hay DV. I think project farms latest test on ceramic paint coating might confirm your theory. The secret ingredient in the Adam's brand is zinc.

[@roym.9875]

I'd like to buy the program you referred to in this video, for engine design and cam selection. Can you please advise what it's called and where to get it?

[@graceenginedevelopments]

Thanks David, looking forward to the exhaust video

[@williamherring5441]

DV: When you explain the exhaust sizing, please touch on why unequal length headers (as opposed to equal primaries) are correct 99.9% of the time (probably higher). As you have stated before, each cylinder from the intake, through the engine and out the exhaust are not identical, so why would they need the same length primary tubing (perhaps they need different diameter or steps as well/ based on space)? Hopefully, after you articulate how long overall we should make an exhaust for a particular power band on a certain size engine, you could delve a wee bit on the individual lengths to compensate for firing order induced robbing of some cylinders and other compromises that happen in different types of intakes. v/r wh

[@DavidVizard]

Will - you have this baass ackwords!! If your two plane crank has equal lengths then they are wrong at least 99.9% of the time!!

[@williamherring5441]

Well, it wouldn’t be the first time! Thanks DV

[@user-ye3ty9zd2l]

Darin Morgan has a wealth of good info, not only on his channel, but also the PRI and Engine Performance Expo. My complaint with his PRI videos is they put the screen far away from the camera and never posted his presentation where I can see it up close. DV if you have any pull with PRI, ask them to zoom in on the screen. Seeing people at a desk doesn't help much past the introductions.

[@draven7311]

Thank You Sir, following your suggestions and advice has and continues to make me better at the craft. Thank You again Sir.

[@cjespers]

I would like to hear your thoughts on reduced base circle roller cams vs not. Thanks for the video, best tech on the internet.

[@user-ut4vw6qp3o]

David, I appreciate your technical details your experience is awesome. Also, sharing your results and suggestion is excellent. However, I really, really, really, really, hate the sound bite in the beginning of your show. I really hate it and pass it right away. Can you PLEASE change it. How about a 50's or 60's tune or anything but that blasted sound bite that sounds like someone just dropped their hands on a keyboard. David, I appreciate your technical info. I think your sharing of results and suggestion is excellent.

[@The0utmode]

As for oils I always use full synthetic 10w 30 in a sbc with a flat tappet cam. if you do that you will have an engine that will do 200,000 miles plus.

[@shelbyavant5081]

Works fine if you have a good cam and lifters. Finding those has become challenging.

[@The0utmode]

@@shelbyavant5081 Yes go with hardened lifters I recommend comp dlc coated lifters. And a hardened cam like comp or isky but any cam will work as long as it it quality hardened. I personally like iskys cam profiles better. if you dont wanna wait for months on a custom grind comp cam. I never use any additives just full synthetic 10w 30

[@jamescherney5874]

Isky recommends Brad Penn semi synthetic with all of it's cams.

[@The0utmode]

@@jamescherney5874 Still better than conventional but i'm telling you if you use mighty full synthetic the oil will look as clean at 5,000 miles when you drain it as it did the day you poured it in.

[@dougcrosby6994]

From what I gathered, it all started about "dyno time" and somehow morphed into cams and software. Whatever.... We all know there's folks like Cosworth that have more Dyno testing than anyone could ever imagine over how many years? That fact is, everyone involved has a wealth of knowledge and experience that 99% of us could benefit from and I appreciate the sharing of that knowledge and experience. But venting in the videos as to who has the biggest tools is bad for everybody.

[@racerd9669]

The very most over looked aspect of cylinder head development is wet flow testing. Flow quality is much more important than flow quantity. The true measure of a great head design is how much total timing does that cylinder head need to make best power. Wet flow testing needs to be done with the entire system , with the piston in the bore, placed at different heights from TDC to look at the fuel across the entire chamber. When you can wet the piston evenly 100% across the piston, that cylinder will make greater power at reduced timing. Any thing under 20deg total timing is a great cylinder head design. Just check out the CHI 208 cylinder head, that head will do this.

[@jimmyconn7314]

Ty Mr vizard.i find your depth of knowledge very informative and exciting. Ty sir

[@mikedeal8659]

Thanks David!

[@hotrodray6802]

And please support St Judes

[@autumnjeserich2689]

From the information I've been able to piece together from your content and the cattledog garage I specced a cam for my 6.0 LS rebuild for my truck, I got a cam that is vastly different from what's on the market. So I put this cam specs on a couple of engine simulation software programs up against cams from the likes of comp cams and brian tooleys cams and the cam I specced based on your formula along with consideration of the physics of valve events it performed better in the entire RPM range(I tested 1000-6500 RPM with a redline target of 6000) while having a better quality idle as well. Torque per CID went from 1.22 to 1.38 on pump gas at 10.5:1 compression ratio. I do know that this is a no BS channel so I will need to have a cam ground so I can test this on a real dyno, However these early results do vindicate my skepticism of major cam companies comprehending the same camshaft for 2 different displacement engines. But I hope I can get this cam made and tested so I can report back the information whether good or bad so there can be more information to have better understanding. I don't mind being put on a blast if I am able to learn something from it

[@antoineagius1181]

Thank you for your info and to teach us, looking forward to watch your video about the pipe / pipes of the headers. please can you explain this topic for natural aspirated and turbo / forced induction engines. God bless you Mr. Vizard , from Malta

[@joeljimenez7651]

Mr. Vizard, you are a badass that can’t be matched!!! Thanks for all the good stuff!!

[@thetruthpal9235]

This was embarrassing. Then talks about his 4-cylinder mustang needing a 4inch min air induction for the car😂😂😂😂😂

[@calebpier7401]

Does Darren Morgan have a second channel? I was only able to find the one with 4 videos. I was hoping for more information.

[@thenewBH]

Some people are busy bloviating, some are busy actually building great cylinder heads and horsepower. Think about that.

[@fantaseahorse4696]

Only one day later and this video isn't aging well

[@rang07du]

What do you think about 3d printing this ram air inlet thing ?

[@DavidVizard]

Thats what we are planning.

[@donbrutcher4501]

Thank you for pointing to the other channels.

[@GrandPitoVic]

Yes it has been a few bad storms here in North Carolina sir. I am down in Fayetteville. A few hours away from you guys. We didnt get it no where near as bad you guys did. Im glad power is back up.

[@NotSure723]

How's the polyquad video coming along?

[@biastv1234]

Darrin is absolutely up there

[@stevehammel2939]

As always, your videos are always informative and interesting. I have one question, why haven't you ever developed or tested a rotary valve system?

[@calebpier7401]

Lol, and what is the ideal spark plug location on a diesel engine.

[@KZ-se4ik]

@@calebpier7401 I think you confused rotary valve (a real thing) with valves on a rotary engine (which is kinda funny).

[@jeffwooton7138]

On the subject of oil, and additives, be it ZDDP, or Oil Extreme, there is a gentleman on Speed Talk that goes by the handle 540Rat. He states that he is an engineer of some sorts, and has developed a test rig different than the one that uses the wheel and consumable slug. He states the same as what Lake Speed Jr. does, that the zinc is only good to a certain point. He has put out a comparison chart of observed pressure resistance ability of different oils, that points towards a possible reason these flat tappet cams are being ruined during break in. It is a quite well written blog. I do not have the link at the moment, but it can easily be found. I've also seen video of man running a dial indicator across the lobe of a supposedly new flat tappet cam, showing ZERO crown to it. This would/could also be a problem of some flat tappet cams being destroyed during break-in. Interesting stuff. Any Mr. Vizard, I truly appreciate the knowledge you freely share. I have been a long time study of your work. I have several of your books, and will be getting the rest to balance out the collection. I'm getting of age to have time to put your knowledge to my projects. We appreciate you. Side note, I'm patiently waiting on your cam suggestion for the AFR LS3 Enforcer head. I've a 3/4Tn daily truck, that hauls on weekends, that needs these heads.

[@V8Lenny]

Rat was laughed out of that forum.

[@havebenthere]

David, I watch both yours and Erics videos. I wish you would stop the I can piss higher stuff as it really ruins the videos. I understand that sometimes there are things one is passionate about and thinks they have the answer, but I don't care how much experience one has there has always been 2 sides to a coin. Stick to what your good at and you'll have many listeners.

[@bloviatormaximus1766]

12.6 square inch cross section area in a spline shape in a CAD App. to dictate that form/area so it can be printed to get the section to transition and fit and not disrupt air flow

[@theguy9234]

Waiting for exhaust pipe sizing video

[@rustywater3219]

What do you think about garage 54?

[@V8Lenny]

Lake Speed just tested Oil Extreme, it was total crap.

[@DavidVizard]

Lake Speed and I tested oil extreme, Note --- Lake Speed and I!!! Sure we did not, as he said, see any positive results. That was because I ( yes me - most often known as DV) screwed up the test procedure. I believe Lake is doing some video footage on that.

[@markmcmullen1371]

That's Lake Speed JR, Lake Speed was his father.

[@rogerupperton840]

I think he knows that, he bought his fathers Cup car.

[@brracing7861]

Challenge him to a Race at NNN 2024 DV.

[@billlittle4285]

David i found using a single pattern cam and porting the head to match that cam and the correct C/L and advance or the other way around will make power,!!

[@jackwillson8099]

I know how too Settle this David you build a motor & Eric. rules 454 chevy crate your only Allowed port the heads custom cam ,modified anything in motor max compression 11.5 cr

[@ElvinLeadfoot]

King David! We can go to Missouri and meet Dr. Hydrogen:) A interesting field trip

[@1magnit]

There's something wrong with the Zinc man, he's got funny eyes and doesn't blink. Not to be taken seriously.

[@pontiac411]

How do I get a hold of you are Terry for the SBC Dr Air Intake we discussed? Been emailing and calling for over a month with no reply.

[@themr2guy]

Thanks David for sharing your experience and wisdom with everyone. I’ve been reading your books for decades and your stuff just makes sense. Looking forward to more tech coming from your channel.

[@ElvinLeadfoot]

King David Vizard (Research Engineer) I think I have you the correct title:) Especially being British:)

[@richardscott8186]

You are such a gift to us! THANK YOU!

[@40calDeathPunch]

Between David Vizard and Gale Banks on performance is by far the best there is bar none. Everyone else is amateur status.

[@willrobb9520]

Don't forget Steve Morris. Not amateur by any means and also very willing to educate. These guys all fall into the Unick, Yates, Hendrick, Roush, and the list keeps going category. I do recognize that Gale and David publish more than anyone else, but they are far from the only great ones out there.

[@AB-80X]

What a ridiculous comment. So many out there are super talented and great at what they do. They just don’t hype themselves up on YT like DV does.

[@40calDeathPunch]

@@AB-80X Don't use words you don't know the meaning of.

[@AB-80X]

@@40calDeathPunch Unless you also come from an accredited ivy league Alma Matar and have a PhD, I don't think you're in any position to tell me what I can and can't understand.

[@40calDeathPunch]

@@AB-80X Looks who's talking? A fool who can't handle the truth.

[@RBGgermanKX250F]

Funnily enough Lake Speed Jr debunks oil extreme pretty thoroughly

[@DavidVizard]

No he doesn't. Read my post above.

[@mrelectron6220]

Mr vizard, the years of experience you have is a testament to you knowledge. I enjoy watching your videos but I find some of your subject matter a bit out of the realm of the average guy. Tho you do also cover subject that us hot rod enthusiast can understand. Again thank you for sharing your knowledge us.

[@benrossbach6501]

Man one I hope to have the knowledge David has in maybe his pinky finger. Thank you sir

[@stephenwest798]

Always accurate information and a wealth of useable knowledge. Thanks for sharing it with us.

[@deanstevenson6527]

Half cut Kiwi Emoji from New Zealand. Well done, David V.

[@joeinmi8671]

I'm good on 337 speed. Just kind of seems like a "his opinion" type channel. Watched a few of his videos and it's not a bad channel, just not for me. I am curious on lake speed Jr's additives video released yesterday criticizing oil xtreme...

[@strokermaverick]

David, is fed up!😃

[@billlittle4285]

David my son's 377 ran 10.10 at 130 in a 3200 lb Malibu, he decided to put a Set of 1.875 race headers on, the old ones wer'e 1.625 street headers, same collector length, he lost 2 tenths and 2 mph in Quarter mile, it lost it in the 330 foot,small headers ste not bad...oh his engine made 595 and 510 torque with those small headers....Mmmm, Hi David😊

[@nick9343]

In some situations those race headers will perform better just not on a quarter mile.

[@autonomous_collective]

👍

[@Nobody-ld7mk]

Vizard was doin it when not so much was known, Chet Herbert & Ed Iskenderian were a couple of Guys out there a little ahead of Vizards entrance into the performance scene, makes me wonder how many of those Chet Herbert, I'll grind any cam for $39.95 Vizard's dyno-d for research numbers back in the day.

[@rang07du]

Hello DV please if you are considering buying something to improve picture quality you better talk to pro because you can spend bunch of money on enhancing quality of lightning problems, noise etc. I think the content format is really good in chapters(introduction, announcement of topics, the actual topics, credits) and "offer to subscribe" button after the announcement and maybe at the end (i saw that yt can actualy light up subscribe button but idk how it works). And last but not least editing and audio levels are very important and its also better to talk about this with someone who can really help. Sorry for my eng. Big Thank you David and Andy

[@yelyab1]

Mechanical engineers can take classes in lubrication. They study the shape of the oil separation layer between 2 surfaces. It has some weird name. So there is science to estimate sizes and areas shapes of lubrication layers. I didn’t take the course.

[@phildo39645]

👍🏻

[@ElvinLeadfoot]

They know so little of all you’ve done in 80 years. Like a drop out of an eye dropper.

[@1magnit]

Love your videos. And your books, the first of which I bought over 40 years ago.

[@daledavies2334]

David, juggling 6 balls. Two give me enough trouble. :-) Just my goofy sense of humous getting loose again. I post replies on For A Bodies Only and make recommendation on what I have learned from you, Andy and Ben Alameda. There is of course some racers that think you guys are full of it while they are the experts. Much of what I have mentioned is aimed more at street applications. Mopar guys that are adamant racers of course think gears like 3.91 or 4.30 and a converter are mandatory. There are donkeys dieing of thirst that you can take to a fresh lake but can not get them to drink. As you stated, their broblem!

[@richardmoerke9329]

Take it easy!!! I think some of these people try to get you fired up. No I don’t know why but as you know some people are just dicks . I myself want to find out more before I go and wish I had money to help you out with this stuff. Like the 318, air box,and so on. Some of these clowns just don’t get it. Like your cam program. I would love to have that but I am 65 . I would love to make another motor. I really thank you for what you have done. I just wish I had seen this stuff 40 years ago.

[@dmc5681]

Quality not quantity David

[@JayDee-bz2ge]

I love it! you see the people making the cold air intake & say, " they could have done it better".. story of my life! It bothers me sooo much when manufacturers design a product that have clear and obvious "mistakes", or weak links... I'll say, "they went to all the trouble of making tooling and molds, etc, and they cheese out on the clamp or fastener, etc.. make it better yourself, and David Vizard is proof that using your brain can often out do using your wallet...

[@kennethkairn560]

DV talks about the mgr. spending more effort on their logo, and complains their should be more slope to the design. Obviously, with a greater slope, the logo would be harder to read.

[@shawnwieser7101]

DV you spend too much time explaining how great you are... Kindly send more time on these videos with tech.... Let the viewers learn and stop worrying about what others are saying... I personal don't care about rants and raves between people on you tube.... I think viewers can make their own decisions....

[@shootermcgavin2819]

I agree. DV is very well learned. Thats why I am subscribed. He does need to be a bit more humble. That's why I like Eric Weingartner. Both guys are no superman, Eric knows it.

[@Nobody-ld7mk]

I'd be willing to bet Johnson stared down & slept with those Ford designed castings Glidden won so much with for many hours, which led to the Semi-Hemi DRCE's. As the DCRE's evolved, valve rotation increased. He learned quick from running Glidden, his 24° Chevy heads belonged on a two ton bread truck. At one time everyone ran with what mass production offered & it's all developed from there.

[@trailerparkcryptoking5213]

Larry Widmer designed the Boss 429 heads for SVO that Glidden won world championships with in the 500” days that started in 1982. Glidden couldn’t compete in 1982 because he had to abruptly change engine programs from the Cleveland to the big block Boss engine. SVO knew they needed more technology to compete in the new 500” class and approached Widmer who was an aeronautical engineer. He designed a badass combustion chamber by welding in “swirl pads” to enhance combustion. There are pictures of his work online and it is impressive. Widmer did up a few sets of heads and SVO made them available to the public and Glidden freaked out at the thought anyone could buy them so he bought all of them then pissed Ford off and they scrapped the head program. He won world championships until he used up all the heads and retired....

[@Nobody-ld7mk]

@@trailerparkcryptoking5213 Interesting, I never followed Ford much, see some reports of this Widmer swirl approach produced 40 more lbs of Tq. and up 20 Hp with +30CFM. Might try that on a Brodix BBC head, on the milling machine, plunge a ball end, end mill at the right angle & depth just short of the plug and keep the radius on the plug side then blend the other side into the chamber. (first consider using the stock canted valve angle of 4°) need to look it over.

[@landoncustomclassics]

Great video David!

[@salvatorehayes2753]

I Believe Hes Referencing EW. I Was So Heart Broken When I Saw EWs Comments. I Fallow Both Him And DV. It Sort Of Hurts That There Is Tension When We Are On The Same Team. Not Many Have The Time To Research And Sift Through The BS And I Completely Understand How DV Can Look Like Some Sort Of Charlatan When You Have No Context Of Who He Actually Is.

[@billlittle4285]

Lakes ok, helped alot with rings, his salesman's are very good, good service!!

[@williamweir2744]

So am i

[@rang07du]

I think Lake's stuff is great

[@craig8187]

This is like watching a politician, or a captain going down with the ship. DV is embarrassing himself.

[@DavidVizard]

If, and I do say 'if' I am embarrassing myself I sure am having a lot of fun doing it!!!!

[@Comet-hn3gm]

Go David, go.

[@nicholasagnew2792]

I'm just wondering if its even possible to have thousands of dyno pulls to base your knowledge on and not know what you're talking about, it comes with the career. Just because you haven't devoted your life to engine research and you can't comprehend how someone can know certain things, that doesn't mean its unbelievable. Give the man some credit. Never underestimate the human mind and spirit. Mr. Vizard has my respect.

[@7071.5cents]

SIR David anytime i can do you another favor... would be my pleasure

[@JimmyMakingitwork]

Cam controversy is almost as good as it gets.

[@stevesadusky8634]

Hi David 👋

[@glendekoker3682]

My friend did an engine build test for most power was a winner in the magazine. Said this guy David was there and a fool lost? He was loaned a carb held over his head got soaked with gas.