Darkcrime

I'm at 244rwhp/281ftlbs trq after pi swap, pullies, cai, h pipe, flow 40's, and chip (dyno tuned). I do have a **** trans, and an auto, but I gained approx 64rwhp with all of these items. After the tranny swap, TB/Plenum will be next I think.

incubus1275

im probably putting down around 265ish hp at the wheels with my mods. It ran a 13.5@101 at maple grove raceway a few weeks ago which is a whole second of my old ET and i had 209 at the wheels before the swap.

BCisme

i stated in my post TB/plenum COMBO. s TB on a stock motor no, will not give much power. when combined with a plenum on a car with basic exhaust and a cai bolt ons, yes, they have been dyno proven. C&L started it and several others have followed. http://www.accufabracing.com/mustang_gt.htm

blower cars have seen 20+. i had this on my car as a full bolt on GT, and have known many people who have used them with great results.

Cassies01GT

Yea but how much air can the heads take in without being forced?

BCisme

huh? N/A you will never outflow the stock MAF, or heads. the intake becomes a restriction at about 6K, and an upgrade is really only necassary if you want peak numbers, have a high revving n/a car, or go with a nice boost setup.it's not so much the size of the ports, but the shape and smoothenss improvements from the porting and polishing that increases the velocity.

as i said, i went through the whole pi swap deal back in 04 when 300 rwhp was still a new achievement for n/a 4.6 2 V's.

BCisme

Ken Bjones stil holds the record at 368 rwhp N/A. using PI heads. there's only so far you can go n/a, and the pi heads work well enough so that no one's developed a new casting for them yet.but the plenum and tb work great on blower cars unless you ditch the pi manifold. that's why i like them. it's one of those bolt ons that compliments other mods.