Re: Frankenplenum
 

Lee, check to see how much clearance you have from the front of the throttle body to the hood. If you have room and you are doing this many mods you may want to raise and center the TB with the center of the plenum.

Re: Frankenplenum
 

They picked up 15hp with this slight change in the plenum roof

http://i69.photobucket.com/albums/i6...psvb9rhpir.jpg

Re: Frankenplenum
 

I just noticed that car has Gen 2 Dymags

Re: Frankenplenum
 

Interesting.... what all do you know about this motor?

Re: Frankenplenum
 

I want to say its a 380-385 ci car, no mention of cams if I recall.

Re: Frankenplenum
 

Looks like is 402-408ci

Re: Frankenplenum
 

Lee, the 15 HP gains does not necessarily mean it's the height of the plenum.
Lingenfelter was also getting 15HP but he went the other way (under) on big inch motors.

What this tells us is plenum volume is not enough no matter which way you go up or down.

Test this at the track (same day) do some runs with a nicely ported plenum then change out to this plenum,better yet i'd like to try it on my Z.

Then if it gains performance i'll just drive away with it. :-D

Pete

Re: Frankenplenum
 

It is a crap shoot....plus lets consider who is building it(me) ...so another factor. its also not so pretty....but I am not spending a fortune on it either($125 in it as it stands). Will be interesting to test.

Re: Frankenplenum
 

For those who are quick to dismiss the increase in plenum size due to it being only a 350

http://www.hotrod.com/how-to/engine/...lly-is-better/

"We tried it on a 303ci motor, a 358, and a 370, and the results were all about the same. The three motors didn't have the same peak power numbers but they all improved by about the same percentage.

Re: Frankenplenum
 

Good old West racing. Ledgend has it they have played with flat plane cranks in LT5s ;-)

https://www.facebook.com/video.php?v...15605822403339

Dave Hetrick