Plums71

I found a couple of threads but no real answers.

Which carb style intake is the best???

I saw a comparison between the GMPP intake and a stock L76 composite manifold, and the carb'd intake actually lost power. (LS2 with L92 heads and a 230 odd duration cam) Would the Victor jr have been any better???

This will be going on an LS3 with cam and heads.... I don't want to go backwards!!!

Pwebbz28

iTrader: (31)

you can not use the same cam to compare a single plane intake and a plastic intake. That being said, I like the GMPP over the Victor Jr in a Fbody unless you are using a cowl hood. The Victor puts the carb stle thorttlebody so close to the stock hood that it becomes a restriction. What are your goals with this project?

Irish350

iTrader: (14)

not to threadjack (also interested in vicjr vs gmpp); but what characteristic changes would one look for in a cam for single plane vs plastics?

Pwebbz28

iTrader: (31)

Generally, single planes like a really tight LSA 106-110 there are also alot of cam events to play with that has to do with reversion due to runner legnth but Im not really the guy to talk to about that.

LSWNDR

Yes he is very right an not to mention the Tq loss for a peak number. Thats the question you have to ask yourself. With a plastic manifold your going to have all around power on the street, but with a single plane you almost need a auto setup to run in the same range at all times.

Plums71

This application is race only.

Hood clearance is not an issue, as it's an open wheeler.

Thanks for the replies.

lt1773

iTrader: (1)

any more inputs

team39763

iTrader: (3)

I'd like to know too. I got a GMPP on a LY6 I just put together, but if it's worth it, I'll swap it for a Victor Jr.

Antler

Bump for some results. My wannabe project is an 80's G-body with a 370/L92/GMPP combo. I'm not sure what the numbers will say but I'm not to worried about a peak number, but the GMPP appeals to me for figment issues under a stock or 2" cowl.
If anyone has any hard facts please post.

1cdub

iTrader: (5)

FWIW, my car picked up significantly going from the L92 GMPP to the L92 Vic jr.....This is in a carb'd application with a big *** cam and 454 inches...

Z-28 DISASTER

what about a marcella or beck sheetmetal?