To let everyone know I just hung up the phone with Mr David Vizard and we had a wonderful and long conversation. I had posted that in the past I had emailed him with no responses and I found out today that the email I was using was no longer in use because the gentleman who was handling that for David has passed away. So David actually took the time to look me up and reached out to me and we have each other's contact information now and had some great conversation today. I look forward to working with David on some future things.

I think the best way to handle this is to take two sealed GM crate engines (604, or whatever they’re called). The only mods allowed are a custom spec’d cam by each contender, and head porting work done by each contender. Nothing else other than valve spring upgrades to support the selected cam. Then, a dyno battle royale where the winner takes all bragging rights.

Maybe you and DV should get together and swap notes. Maybe BOTH of you could teach each other something.

Eric, I just want EVERYONE to know I've watched MORE dyno videos than ANYONE on KZfaq! What everyone else has watched is like a pimple compared to a full blown boil that I'm sporting. And yes, I'm going to have it lanced.

There's thousands of us that feel every single word you just said..... educating the public is a almost impossible task,

Also, about the subscriber thing. You do you. Maybe you'll lose some, maybe you'll lose all of them but it doesn't matter. Your content is so good, people will keep watching it subscribed or not. I think you're on your way to hitting it big time.

I've learned this in my 69 years, worry about your business, not other people business, be humble my friend......no one has died!

Bought a few of DV’s books years ago and learned quite a bit from them, however I noticed some shortcomings on the books on explaining some things. Fast forward to his KZfaq channel, there’s a lot more shortcomings apparent. I really like your content because you explain things well and you put things head to head vs beating around the bush

Warren Johnson didn't rely on a flowbench as much as most people think. He said that he has never seen one strapped in to a racing seat and go down track. Pro Stock is a whole different world finding a few more HP and torque.

I worked for a company that bought industrial engines from GM and Ford. We dynoed every one, 5 dynos running 2 shifts and we built 100,000 engines per year for a couple of years. Our competitor dynoed the same engines and sold 40% more engines than we did. Any one of those dyno operators could rightly claim they have "dynoed" more engines than DV or just about anybody else. Dynoing an engine is one thing, doing true R&D is another. As you said, there's always someone out there that's done more than you have but that alone doesn't guarantee their results are better than yours or someone else's. My advice.......let it go!😅

This kind of stuff really breaks my heart. I'm a big fan of both of you.

Eric, you have a great channel and are obviously very talented. I regularly watch your videos and am a new subscriber ( I didn't realize I wasn't subscribed). I can understand why you question some of David Vizard's claims (he does come off kinda arrogant at times). However I do believe he is legit and I believe it could be mutually beneficial if you would contact him directly and pick each others brains a bit. I think both of you really stand up guys and would love to see you two work together on some kind of project!

Please don't be too harsh on a 82 yr old man who has had brain surgery and has a very poor memory ! Have respect ! I'm not being mean, I love your show ! God Bless !

Well I reckon you handled the situation pretty well, it’s unusual to find someone disagree without resorting to insults. I read DV’s books years ago and always respected the man but the dramatic bragging in every introduction gets a bit punishing. Keep up good work mate.

Nice video Eric. Very enlightening. Keep testing. I appreciate your humble attitude and fair honest approach. Have a great day.👍👍

eric,dont let this stuff bother you.I watch you,morgan,vizard & chad spier and learn from all of you.there is no perfect way to do anything.

I bet if someone asked Eric Weingartner right now if he ported cast iron heads, he would forget all about DV. Lol

My hat is off you Eric. Keep on doing what you've been doing. I've learned a great deal about porting from your videos. I'm gen X so I also read DV's books growing up and I used his information as a learning tool as well as others. I really respect both of you and just take things that happen with a grain of salt. All of us gearheads are a small group in this world so we need to stick together.

I always thought D V had a big head , he shoots his mouth off to much

Can't we all just get along?

All is prevented by not making outlandish claims. No matter how good you are, theres someone better.

A humble genius will have the greatest audience

I wont try to prove your point for ya, or DV's for that matter, but my comment is this... I've been in person to several NASCAR shops and have been to several NHRA shops and never once was I in a NASCAR shop (Bill Ellitotts multiple times by the way) when the Dyno Room wasn't humming away and in some shops there were two and sometimes both were running. The NHRA Pro-Stock team's shops I've been in were 100% running the dyno every single time I walked through the door. Now, I do have respect for all the DV has done and certainly he's a smart guy who has contributed a great deal. But that comment of I've made more dyno runs, or have more dyno time that anyone else is not something you can say with a straight face. Just the OEM companies alone have more dyno time than any single engine builder, race or otherwise. Throw into that mix the racing industry and there is 1000 more, toss the F1, NASCAR, NHRA and you're bound to find a few hundred more with more time on the dyno than DV. Look, I like the guy, he's creative, he's found things that many never ever find, but it's not like the entire world of automotive engine improvement can be boiled down to his cam program. There is NO one guy who knows it all or something that nobody else will ever find out on their own. Short of offending DV for his comments I can promise that no matter DV's age and the total accumulated dyno time he has spent he won't surpass Everyone and what does it matter if he did or didn't. There is simply NO WAY to prove such a comment that "He's had more dyno time than anyone else". You want a name or two that I would sa are above DV in the top 10 of ONE GUY ENGINE BUILDERS, not mfgs or massive budget race teams, they would be Bill Glidden and Gale Banks... Either of those two would have more dyno time than you'd think would be possible, but neither of one of them would/would've told you they had more dyno time than anyone else... They might say They wished they had more.... When the NA guys from multiple sources can get VE well past 100%, in the case of NASCAR and NHRA Pro-Stock well past 120%, then they've spent their lives in the dyno rooms, end of story.... Looking forward to the head dyno information when you get finished... Thanks for the good channel and the honest approach...

You're right. You should have left it alone.

Warren Johnson is a mechanical engineer too.

DV may be a very smart guy but I'll never know. I've never been able to watch one of his videos all of the way through. Just a few minutes in and his arrogance starts shining through. I've heard the wind blow before.

As a huge DV fan I have to admit that DV is old and living on the past accomplishments. I kind of listen to him on KZfaq, but have pretty much wondered away. If he wasn't so full of himself his videos would be better. I've read and studied his stuff for years and I will have to say I've learned a ton, but for every nugget you have to listen to hours of B#^%@* to get anything other than what is already in his books. Every video almost is a reiteration of something in a book he wrote 20 years ago. FACE IT DV YOU'RE OVER THE HILL. Eric don't bother yourself with his hot air, it's kind of the only way he can stay in the lime light. Just keep on with the very informative videos that you do so well.

DV's opinion carries no weight today. Apparently he has no dyno today. Presents himself as an angry old guy who is absolutely correct, and should never be questioned.

Hey Eric Everyone has an option on all this different racing technology. Till you personally sit down with each of these different individuals with all different opinions at the end of the day you personally don’t know what they do. Everyone of these individuals have egos and think they’re the best at what they do in this race industry. If you find something that you can learned or can use from these individuals than do that and leave it at that point. I will tell you this from life’s experience as a 61 year old, you’re dead wrong about having solid technical information and data that works and the automotive industry will pass on it. There are hundreds if not thousands of technologies that were valid or cutting edge that was passed on because it would upset a certain program. Check out automotive inventions history and you will see how fair behind we are with technology. So don’t be so critical on some of these individuals that have a big ego. Just do your part and learn what you can to better yourself and win some races. At the end of the day everyone had teachers they didn’t like but still learned something. Who knows in 20 years some kid might prove Einstein was wrong! Take care and don’t take this personal Cecil Miller

DV's proclamations over the last year are actually kind of sad to watch. He had a decent amount of respect from people who actually matter and are knowledgeable. But it has gotten bad, especially the comments about WJ. I mean he's not even close to the same arena and proven accomplishments as the professor. Again, sad.

Hope you could hang out with DV. Maybe your viewers or another KZfaq could pay for it or start a go fund me. Neither of you have anything too prove to me. Learn from both of you. A collaboration would certainly help the sport.

I love your channel Eric. I have watched several of DV'S videos and the more I watched them the more I feel like you do. I think he has SOME great wisdom, BUT as you said here, I don't believe for a second that his advices and knowledge are above so many like Warren Johnson, Greg Anderson, Bob Glidden, and so many others. I'm just a hobbyist, and do a lot of "Old Skool" porting for others, because I have no access to a flow bench. But after finding your channel a few short months ago, I have learned a lot about the rights and wrongs and some subtle indifferences. Keep up the great work so I can keep learning.

I really enjoy that DV has brought in other channels like Unity Motorsports Garage, UTG, Charles Servedio. He's like my British Hot Rodding Grandpa and I dig his channel for that. I think he has a solid knowledge and craftsman base. I like your channel as well, Eric. Part of the reason I went out an got an old S10 to build some engine combos for. I also wonder if you may work a little too hard and are alone working too much to think about this stuff and get upset over it. I am guilty of the same thing. We all have to start somewhere and while I totally love your hard data approach, some guys are still farting around with 882 heads (and yes, that group needs to come to jesus and realize as I did that aluminum heads are where it is at). The racing world is full of conjecture, old wives tale tech, and people who know. That said---I'd love to see a meetup with DV. Maybe take him up on his offer.

Thanks for the heads up on the Larry Meaux Pipe Max. I’ve heard of the program before (I think from a DV video), but haven’t looked into it until now.

I think you and David are both great guys. Give him a call.

I use performance trends engine analyzer and it’s typically within 5 hp of what it shows. Super handy to pick intake/cam/head combos

DV has great formulas for building max average hp/tq sbc street combinations. Given a 10.5:1 355-406 on pump 93 with 250-300cfm heads, a 4500-6500rpm range, his ideas work very well. Made many strong street car combinations with his observations/combinations. It was great information way back when. Nowdays, dv has no dyno, and is trying to apply "thousands of dyno tests from 1985" to today.I bought all a of his books, then i bought a dynojet.

As a hobbyist, I've learned so much from your videos over the past 3-4 years. Now, you're backing it all up with Dyno time !.. and taking the time to share your findings with us. Freaking Awesome !! .. I've also read DV's books and found them insightful as well. Just keep doing what you do brother.. Your effort is very much appreciated. 🍻

Hot rod and every other magazine sold us for years on what was the best. Some of this testing disagrees with articles we thought for less daxt for decades. The cam companies and product companies pushed their products and car magazines pushed it like a drug. It’s always about sales. Without selling heads or head porting or any service or books he doesn’t eat and pay his bills. But With Eric Weingartner at least we have some numbers and dyno proof of what we get. No body twisted my arm to buy many of the dyno books. But these numbers will help me build a serious high rpm 350 cid small block. I’m sold on the shaft rockers for sure. Thanks Eric I will keep watching and learning.

Im with you. 100% correct. I'm not at odds with anyone, I just don't think that anyone knows it all. If someone would quit watching videos from you, it is arrogant and only displays that people are emotionally attached to beliefs not truth.

Eric thanks for the video, I like the way you share data , I’ve watched a tone of DV videos , he goes on and on and on …. Yeah keeping doing what you do here in Australian 👌🇦🇺

You really should just let it go. DV does what he does. Has done a lot of it. I don’t know if he’s done more than anyone else. Don’t care. The information he puts out is solid and relevant to what I build as a complete amateur. DV is an excellent engineer but you have to hang in there a little bit to understand his communication. Is he the best? I think he’s one of them. I’m sure you have a different perspective and much more experience than I do but do yourself a favor and let it go. You’ll be here doing your thing long after He’s gone.

I saw a video DV put out years ago about tunnel rams. I listened to it for information but he said basically nothing. It was just a bunch of words with no substance. Same thing from every video I followed up from him. Gave up then and there. May aswell be a politician the way he puts out words with no substance.

Eric, your not making a proven argument , its your opinion . I like both channels .

I have watched a lot of DV videos, and you can see him struggle, due to his brain surgery due to no fault of his own. Dv seems to lash out sometimes, which may be due to his struggles, and he may take a comment as a personal attack. Having a KZfaq channel he needs to have a thicker skin. Mr. Weingartner I have watched your channel also and this was a very well balanced response, and as someone as mentioned in your comment section it would be nice if you two got together. As busy as you are, I really don't think that would happen currently. Keep up the good work.

I have been watching your channel and videos for a while. I like learning new things. I am not running a SBC or an LS, but the concepts are the same and I use it to learn my silly little Nissan VQ V6 to make it better. Keep it up. There is always something new to learn.

Eric, I think you're an honest, no BS man and a TRUTH detector. And you always try to call it the best way as you see it objectively. That's why I drove 12 hours to your shop with my 2 sets of AFR heads for a marine app a few years ago. Just keep doing what you have been doing ----- looking forward and learning and growing. Onward and upward ⚔️👍

I like that you mention the infographics. Anything on the yellowish/orange (IOP and later) is Stan's handiwork. Stan is a pretty cool dude but he also has a vested interest in making the images show what DV would like to portray. The cam thing blows my mind. I'd wager that just during his time with Gibbs, Jason Line tested more cams than David did in his entire career.

So i was a gm linetech for 25+ plus years ima retired now an folks ask me can u work on my car i tell them no i cant ... i dont know anything about the newer stuff .... older guys have issues admitting they cant or arent what they once were ..

When Lingenfelter was developing the pro stock truck stuff they had more than 70 camshafts at one point in time. There was only about 10 good ones that they would cycle through when testing a new intake or headers. For them to test a different intake would take like 100 runs

I am looking forward to hearing about the Promaxx 375 heads. I will be putting together a 572 and am looking for a decent head to put on them. Eric, thanks for all the effort in sharing info with us.

Thankyou for all that you share, stick at it bud. Learnt so much from you and yes i have see some of dv's videos as well. I totally agree with ya

Keep being honest and doing what you do brother and I'll keep watching have a great day Eric

EW , the worker, showing the product of hard work and getting results. DV , the politician , flap jawing about myth, sky faries and forever skirting the presentation of actual results by putting others down. His channel that professes to 'not take BS' should in that light cancel itself!

Vizard has a huge ego and loves to brag about himself. Just my opinion from what I've seen.

The more you learn, the more you start realizing how little you know. That is why most really knowledgeable people are very humble guys. Keep on keepin´ on Eric. I´ve learnt a lot from you. I really enjoy most of what you put up on KZfaq. Not porting cast iron? I think you will... eventually 😜

I enjoy learning from both EW and DV. Will continue to do so. I wish I could go back and change how I acted at times in my life too. We've all had our moments of too much pride or whatever it was that we let get the better of us at times.

One of the hardest things to do in life is letting stuff roll off ones shoulders. I am no different than you are. I like to try to give an explanation but sometimes if I could just look past it like Philippians 3:16 and not look backwards, I would be much better off for it. I’m here because I respect your work & sharing results, I sub to both of you & honestly watch you 9/10 times because I’m into the stuff you work on.

Thanks for posting. It was not obvious to me from DVs post he was talking about you, but you were the only KZfaq porter I could think of. I do like watching Charles Servideo's porting vlogs. He dabbles in quite a few different domestic makes and learned some of his craft from DV. He seems quite humble and also data driven. I like that he incrementally makes changes and posts when the things he tries does not work out on his flow bench.

I've watched enough of DV videos to know that DV is a bit of a blowhard and is trying to sell his products. nothing wrong with that. not saying he doesn't know anything. most of his testing was done long ago for cam companies. I'm sure DV knows a lot, but from what era. DV doesn't have the budget to test large scale on his own. the high-end guys are never going to share what took them millions to learn. why would they give it away. don't take the bait eric. wouldn't a dyno competition be a good way to generate viewership? be a good episode of engine masters.

im with you Eric, DV seems to make alot of assumptions and is a littke full of himself. The humble guys are always smartest because they are willing to listen

I like DV, he has some interesting perspectives on certain topics. My issue with him is that in a 30 min video he spends half of it bragging about himself and then another 10 going round and round in circles on the topic.

DV lost credibility with me on a video he was doing about racing in the BTCC, and he went into great detail about a story that involved him and Win Percy, DV claiming this happened and that happened in this race, how Win Percy crashed trying to keep up and DV got a podium position etc etc, i did a deep dive on that season of BTCC and found that not once in that season, did anything he state actually happen, i even went so far as to go through every season just in case he had his years mixed up, but no, noothing he said ever happened period. I know it seems petty but if you can be dishonest about that just to push a point you are trying to get across, where is the credibility.

you got sucked into the social media vortex from people that hide behind a key board

DV is a knowledgeable guy but I take it with a grain of salt like I do from everyone.

Alot of the engine simulators and programs are based on the SAE papers written about that subject. Gordon blair probably has the best written books hes more known for 2 strokes but has done 4 strokes as well. Having worked with many engineers and having had 30 plus engine dynos running 24/7 at the Livonia shop I can say Ive done alot of testing. But I know people that Im confident have done more than David, and Warren put together. Ill say to you what some of the best said to me. Horsepower is easy its emissions and all the other issues on top of that that bring the challenge.

I’ll say this knowing you are both probably way too busy to ever be free enough to make it happen, but Garrett Mitchell was asking for the opinions of his followers on things that need to be tested. It would be extremely cool to have a dyno shootout and then a track test with one car. Give all competitors an identical short block, have them use the same kind of heads ported their own way, same carb, and the camshaft of their choice. If Cleetus got on board to supply the car and do the filming it could really help any competitors grow their channel

Hmm. Two guys whose work, past and present, has aided my technical data base. I hope this plays out.

Ive been reading most the big names since before the internet. I don't totally dismiss DV but I've found him as much as a salesman than anything else. Im not saying he doesn't know his stuff but he is a ledgeon in his own mind. You are 1 of the few that backs up what he says with actual numbers. DV will throw out numbers now and then but to get lengths to talk around actual facts. Most of DV's books and videos leaves me with more questions than answers.

I feel that information,good or bad,is worth having. The more information you take in the easier it is to make an informed decision on anything but I also believe that it’s never good to only go to one place for information. Always stay humble and learn whenever possible because even a genius can learn something from a fool.

Me being a Ford guy… Bob Glidden I’m sure he did a ton of R&D. You’re right, they don’t have time to write books. Warren is definitely one…. Darin is a super sharp guy. I see him on Facebook from time to time. You’re right, lot of them are not on line. Anyways I enjoy your videos

ANY time someone is full of $#it they need to be called out. I don't care WHO it is.

Come on guy's give DVD a break. He is recovering from a brain injury after all 🤷🏻‍♂️

I've always listened to the tone of how people say things. I have DV books, but watching his vids I was turned off. The people that have proven to have the best results tend to have humble personalities and will say things such as "what has worked for me" , "what I've found" "how I see it". Eric your tone is what makes me keep following you. DV's ego is too much for me.

Don’t go too far down the rabbit hole I respect your honesty and have realized whatever people think they think they are right. I love diversity of opinion because being the most or the best is relative. Keep up the videos I have learned a lot and will continue to watch.

the crypt keeper can't even sort out the save the children 318

Glad you made this video, not losing me as a viewer!

Bro don't worry about viewers your work, content and products is awesome and straight fire🔥🔥🔥🔥🔥🔥🔥🔥

I just came here to say, good for you Eric! Stand up for yourself, be proud of what you do and the services you provide. Keep porting and dynoing, you share solid information in your videos most don’t always share.

We have a fellow who used to have a dyno, and did lots of tests. Has lots of opinions, results from those tests, and formulas based on observations with old obsolete parts. Yep

The ugliest thing on a man, is his ego. Your humble nature shines...Keep being you Eric.

Eric always look forward to watching your content, block out the noise and do you,we appreciate your dyno proven and flow bench proven data

Eric, I've been in this game almost 25 years. I liked you from the first video I caught by accident. When you're around as many people for this long, separating the "bull" from the "$*!t" gets easy. I saw through his marketing years ago. Not to mention his material and presentation makes me wanna gaze into my 🔮..... Anyway, you made a legit stand and that's respectable. I wish you made a ton more from KZfaq. Maybe short tutorials of your work and techniques would peak more interest. Then again that takes time away from the job altogether. I couldn't do both....man I know i couldn't. Respect!

I still listen to both of you. For me, what works best is to fast forward the dramatic and stick to what works.

Much Respect. Hard to stand up and tell the truth when most dont want to hear it. Just cause some have big followings or a name others hold them up and nothing more sad than seeing masses of people going through life clueless to whats real and whats fake. I see it all day everyday. Does inspire guys like us to never stop doing our own research.

Unrelated I unsubscribed from him last week. 10 mins of self promoting to 1 min of knowledge. Anyone who talks like that is just a backmarker.

DV has had brain surgery for something, he says it in most of his videos. Sucks. But his mind is nowhere close to what it was 20-30 years ago. Some of his science leaves me scratching my head, if it's that's good why wouldn't the OEM's buy the tech from him. Just truly sad

I have come over from DV's channel, hopefully any future discourse will push the science forward.

There is so much information being shared nowadays that is regular car guys love, it's awesome. We appreciate ALL of you guys. Group hug! haha

People have got to realize there is nobody who has all the answers for any given topic. The goal as a consumer of information is to find the real good information out of the blob someone gives. Anyone who is sitting on a specific side in this kind of thing is just doing the same behavior as a kid in kindergarten arguing that their dad is the strongest dad. Keep the info rolling sir, many of us that rarely comment are the most appreciative of the information and work being done by the collective hot rodding community.

Warren took me into his trailer at an event in Seattle and showed me how to change boosters in my dominator carb. Super nice guy

I appreciate your content. We are all in learning mode. You learn something new everyday. I agree on valve springs thought. I listened to a Nascar and circle dirt track builder years ago. I went to his engine building shop to get a camshaft. I was amazed at all the valve train components he had there. I mentioned about all the best items I saw. He told me it was all junk. He said the valve springs are the most common fail point of engine development. Things have progressed alot since then. He said they will always be the limiting factor of RPM of build . Truer words I have never heard spoken in racing world. If they ever get it right we will be driving 20000 rpm vehicles. Take care of your business we will all be here.

Live and learn Eric. Will continue to watch you. I have heard all kinds of opinions from all types of automotive experts. Take and leave what you want. I will continue to watch your channel. If someone's personality becomes toxic, I won't care what they know, they will be removed on my end of things.

The more you know the more you realize how much you don't know. Props to you and others for sharing your knowledge. I know people with dyno's that test like crazy...and keep it all to themselves.

Good on you Eric watch lot of your content hope things get better for you hate to see a good man go down . All the best Pal cheers mate.

How do you know how many dyno tests everyone has done? You couldn't know that. Anyway, you both go over each other's accomplishments, so at least I am getting a refresher course on both of your accomplishments! Seems like both of you are enjoying this battle!

It’s all in the data! That’s why I follow and buy from you, Big “E”! I’m still working on getting the car together. Like you say, time is short. But I truly believe that this is going to be the baddest m’fr I’ve ever built. I can’t wait to send you videos! Take care, and continue to follow your heart!

It’s always good to see a counterpoint . I still can’t believe people unsub over this stuff.

Your content is great regardless of anything. Anyone who takes dedication to film and provide real information with results is an amazing person. You do something's you don’t have to do. Including showing and explaining exactly how to do your job. The more a person tries to put them self above all others they will sink there own boat! There is always someone doing as much if not more than you that’s just how it is. Keep up your amazing content it has helped many people.

Internal combustion engines have so many variables, the mind can be endlessly challenged by all the ways of combining it. Having difference of opinion over it cannot be avoided, and what makes our hobby interesting is the bottomless well we all drink out of.