Ported Chevy 083 heads, the tpi project

[SpeierRacingHeads]

Something crazy. A 355 Super Stock engine with a 270cfm 172cc Edelbrock head, Victor E manifold with a TPI 52mm GM throttle body, makes 650+ at 7200..

Funny you just posted that. We need a discussion on what power can be made from existing cfm of your 113's even if theoretical vs. Changing heads. I think the tranny will be a huge change for that car. Thanks, Charlie

If it's the video I saw, That thing was a screamer!

That engine was a 355 also. It has a Victor E and a vacuum secondary 780 Holley. It makes about the same power, tad more.

[1989TransAm]

Something crazy. A 355 Super Stock engine with a 270cfm 172cc Edelbrock head, Victor E manifold with a TPI 52mm GM throttle body, makes 650+ at 7200..

Those are some very nice numbers.

[SpeierRacingHeads]

Something crazy. A 355 Super Stock engine with a 270cfm 172cc Edelbrock head, Victor E manifold with a TPI 52mm GM throttle body, makes 650+ at 7200..

Those are some very nice numbers.

The video is not the best, but you will get the idea.

A Super Stock engine is just an amazing engine.

172cc heads!

[Orr89rocz]

Something crazy. A 355 Super Stock engine with a 270cfm 172cc Edelbrock head, Victor E manifold with a TPI 52mm GM throttle body, makes 650+ at 7200..

So its the victor E efi single plane manifold, but with an elbow to mount the tpi throttle?

I heard of a 305 tuned port superstock type motor that made like 290 whp thru the stock tpi! And ran well into the 11’s

[SpeierRacingHeads]

Something crazy. A 355 Super Stock engine with a 270cfm 172cc Edelbrock head, Victor E manifold with a TPI 52mm GM throttle body, makes 650+ at 7200..

So its the victor E efi single plane manifold, but with an elbow to mount the tpi throttle?

I heard of a 305 tuned port superstock type motor that made like 290 whp thru the stock tpi! And ran well into the 11’s

Correct, stupid isn't it! And get this, one of the most popular Super Sock manifolds on earth the Victor E, was discontinued!!

I have a 305 stocker customer with a TPI set up and 083 (I think that is the number) and it made 360ish flywheel.

[Orr89rocz]

I had the victor E efi intake on my sbc turbo deal

[steve cowan]

[quote=SpeierRacingHeads

I have a dyno sheet from a 300/350 Super Stock engine that was dyno'd Saturday. It's not the final sheet, but maybe I can start a thread, lay out what the heads flow and CSA, and let people tell us how it's possible

Chad,
I am sure plenty of people would really like to know how these stockers make the power they do, I have seen the epoxy ports so to speak but what I am interested in is velocity profiles throughout the Port and seat ring area, I would like to see combustion chamber and piston design as well but I don't know how much you can divulge anyway, but would likely get some peoples heads spinning trying to work it out.

[SpeierRacingHeads]

[quote=SpeierRacingHeads

I have a dyno sheet from a 300/350 Super Stock engine that was dyno'd Saturday. It's not the final sheet, but maybe I can start a thread, lay out what the heads flow and CSA, and let people tell us how it's possible

Chad,
I am sure plenty of people would really like to know how these stockers make the power they do, I have seen the epoxy ports so to speak but what I am interested in is velocity profiles throughout the Port and seat ring area, I would like to see combustion chamber and piston design as well but I don't know how much you can divulge anyway, but would likely get some peoples heads spinning trying to work it out.

I can't help with the piston, but can the heads. The velocity is really fast, 350-370 dead center start to finish. Good thing they run a manifold!

Pics of a Dart iron and Edelbrock alum SS head. Aluminum head before final valve job.

[1989TransAm]

Nice work Chad.

[SpeierRacingHeads]

Nice work Chad.

Thanks!

Carnut1, thought you would get a kick out of this. This right here is my wheelhouse, I'm old school to the end.

http://www.superchevy.com/features/1602 ... UxaUQErOHQ

[Carnut1]

Nice work Chad.

Thanks!

Carnut1, thought you would get a kick out of this. This right here is my wheelhouse, I'm old school to the end.

http://www.superchevy.com/features/1602 ... UxaUQErOHQ

No doubt Chad, With the mods you did I am guessing they need to be a certain cc? Nice job as always.

[Kenny M]

Very nice , Looks like my old mopar W2 Days.

[steve cowan]

Chad.
Thanks for putting up photos
Looks like straight shot to the valve, does the intake get given the same shape as head runner?
What valve size?
Are your exhaust ports done on CSA, VELOCITY or cfm or a combination of all 3?
Hope you don't mind all the questions

[SpeierRacingHeads]

Chad.
Thanks for putting up photos
Looks like straight shot to the valve, does the intake get given the same shape as head runner?
What valve size?
Are your exhaust ports done on CSA, VELOCITY or cfm or a combination of all 3?
Hope you don't mind all the questions

Yes, the manifold is full of epoxy as well.
Either a 1.94 or 2.02. All the stuff I have done is 2.02
The exhaust port is limited to 62-64cc, Basically it's a challange.
It's easy to weld up the aluminum castings, the irons gets brazed.

[steve cowan]

Thanks Chad,
I for one am amazed by this and I thought more questions would of been asked, I am confident to say that it is the whole package that contributes to power these engines make but you still have to make it work,
Chad does the high lift flow peak earlier in the valve lift and carry out to high lift or is it a % of flow per lift that these heads respond to, from memory I think I read where stockers use a decent amount of lift and duration and must have to carry way past peak rpm but I would think the avg CSA would be the choke at very high rpm