zhamid04gt

Hey i already have BBK CAI, Headers, full exhaust, and 4.10 gears, But i didnt know if installing the Steeda underdrive pulleys and a Accufab 4.6L 2v 75mm Throttle Body & Plenum Combo with the plenum spacer would be worthit. If i do get these parts i would be getting it tuned with the SCT SF3 / X3 Power Flash tuner with a custom dyno tune. Do yall think i would pick up some feelable power?

sonicx

Tuner +1
Cai... really wasn't / wont add anything.
Headers +1
Full exhausr +1
gears +1
Accufab t/b & pleunum combo +1.... great choice btw

Save your money spacer isn't worth it
U/D pullies aren't going to see a whole lot as well. Esp since if you go to a s/c your have to put stock one back on. ....... As far as gains go. Save your money and skip it.

Overall w/ a tuner, you'll def see a dif once you key this stuff in that i +1'd.

zhamid04gt

what about injectors and cams? im tryin to get 300whp

sonicx

Then i'd say do pullies if you wanna do this and keep her n/a. I've known a couple fellas who kept their stock MAF & Intake manifold but added: U/D pullies, t/b, pleunum, Stag 2 ported heads w/ oversized valves, cams, long tube headers, o/r xpipe, weld-in exhaust and tuned (93 octune) making 324-330whp. They thought took it to a dyno shop as well to get it dialed in. So yes its possible. But your talking about not including labor 3-4 thousand vs. 4-5 thousand for a s/c plus alot more whp.

But also look into doing a 100 or 125 shot of spray. That would be the cheap way w/o injectors or cams to get over 300.

sonicx

I've heard good things from a couple people around here w/ a Zex Nitrous Oxide kit. (700 dollars) Nice part about it is you can have 291 rwhp to 391 rwhp. You'll have to adjust you timming slightly but a kit comes with what you need. With this though, I would STRONGLY recommend an alluminium intake manifold. Plus upgraded internals so you don't blow a motor. Though i agree and ppl w/ say 100 shot won't hurt a completly stock motor. I just won't take that risk.

smitty2919

300 hp your looking at heads+cams and full bolt ons like sonicx said. that's parts and install costs. but to answer your original question, tb/plenum combo and UD's wouldnt be a bad idea. skip the spacer though.

a 75mm tb is not needed, a 70mm i think is just right. i have a 75mm only b/c i found it on craigslist with plenum for cheap.