Final part (#3) of the super porting Vortec heads video. 

I followed all of these steps in 2020 on a new set of vortec heads from summit. GM ones. I run them on a 98 vortec roller block with a xr276hr. It runs very well! Thank you so so much for making this knowledge available! Stay away from the "no go zone"!

This man wrote the book on porting cylinder heads👍🏼👍🏼

David I wanted to thank you for passing on your racing engine wisdom and knowledge on to the next Generation. My brother showed me your magazine writeups years ago, and so glad I can learn more from you here on the youtube. I am looking forward to more on uneven headers for V8's regarding both firing orders, and how that can be calculated, and also how valve seat angles vs flow vs cam timing can be accurately sorted. Thank you again for all the excellent knowledge.

I'm sorry for your loss David.. Your loved one has my prayers tonight..

Thanks DV It's not too often the best of the best share their secrets. Darin Morgan, you and Ben Alameda have taught me much. Awesome group of masters

Lots to be learned here that can be applied to many heads not just vortec.

I think I have a porting book with you name on it. It is good to see that information explained out .

Awesome stuff, I call you David Wizard.

I really appreciate the good information.

Thank you for all the knowledge and proof/real results of relatively basic modifications

I love this guy

Great video. Very informative. I feel like I am in auto shop engine rebuilding all over again. Thank you Prof. Vizard.

One of these days I might catch up😒. Thank you for all you do🤗.

Great detail, I learn more from every video. Thank you!

Thanks David

Nice video. I never did understand the "square" spark plug boss but have you CC'd the chamber now that you have removed it?

,,,,,,,,,,,,,,,,,,,,,,,great dedication to the craft of porting for power,,,,,,I liked the moody music......................

Thanks again for big points,,master time for making small engine run,,😊first make little bigger 😅😅

Great set of videos David. Have been following you since I built my fist engine in 1980. I did have a question about a part of the porting that you did not touch on. What is the strategy when porting the transition into the header? When I port heads I do not port match out to the diameter of the header. Instead I will leave the port one or two sizes smaller. As an example, if I am going to use a 1-5/8 round tube header I will port out to something just slightly smaller than a 1-1/2 round header gasket about 3/4 of the way around the port. I typically do not touch the floor of the port when doing this other than to smooth out the cast surface. This way I reduce the dump loss into the header, but still leave a little ledge all the way around to improve anti-reversion.

Derrick Vice Grip Garage 😳 House of Mopar it's fine 🙂

Dear David, what program are you using to analyze the data, from what I see it is your own design, where can I get it?

david i called terry walters for cam the lady there asked him and he said he was too busy to do cam selection any more where do i call

Why is .700 being used for lift testing on iron vortecs ?

What happened to this channel, there were are lot more subscibers not that long ago - I have to re-subscribe for some reason. Is this a new channel or something? Great video by the way David, very informative.

how much can these heads flow like this or do i just buy a set of 200 or 215 brodix at $1700

Do you do just a 45 degree cut on the exhaust valve, or do you do a 3 angle valve cut,with no back cut on exhaust valve?

Would love know what's going on with that chevy big block 396 build that you mentioned months ago. I gotta 402 big block that I would like to stroke for street some day,

I've done this for years on vortecs

Can you do a video on bigger values on the intake side of vortec heads like a 2.00 or 2.020 lots of people say its a waste of money because it does not for flow i wonder if thats because maybe they aren't d shrouding the valve

So how much hp over stock david, sir. Mr. Vizard. Master wizard. Bloodviking

How much power would you expect to get from these heads if you were to set it up for dirt track racing?

Chancellor Vizard

Wink, I have all his books

The best way is to design a valve that moves out of the way of the flow path.

When u use a valve with a built up base. Tulip, valve it gets heavy.

I was hoping for 75 to 100 cfm over stock.

it's best if add animation

Creepy music

I think the port wasn't shaped correctly at the underside guide wall. He could have removed more from the roof as I did. Bv

Now turbo it......

Modded