383vert

iTrader: (4)

I've been getting mixed reviews on the fast 90 set up, around here in mizz-ouri. I have a 383, ok heads (243's stock valves, ported flow @ 298cfm@600in and @ 230 on ex.), ms4, Ls6 w/portedt.b.,3600stall,3,73's,and 1.75hedders. I'm only putting down 435rwhp. and some guys say I probably won't see a significant difference. Why not??? more air + more fuel = more power Right!! Why wouldn't i see a good 15-20 rwhp dif.? please input...

383vert

iTrader: (4)

ttt

Damian

iTrader: (89)

I moved your thread to the correct location and edited the title a little bit. This will enable you to get the answers you seek

jermzz

iTrader: (18)

totally. go for it

teke184

iTrader: (5)

with more cubes, a big cam (well not so big for a 383) and mild heads....you WILL see a gain with the FAST intake.

how much and if its worth it to YOU are not up to us to say.

but i would look into it.

TVWilkes

Yes, IMO, it will be worth it.

SUX2BU

iTrader: (14)

if you have $1k+ to blow i'de say go for it!
Buy it used, if you don't get the power you want turn around and sell it.

socmguy

iTrader: (18)

^^^Exactly. If you find a good deal, go for it. If not, just stick with the LS6

LS1-450

iTrader: (33)

How high do you spin the engine (RPM)?

SOMbitch

iTrader: (8)

I don't think I really picked up much in my case but H/C went on at the same time so hard to tell what it did. More cubes and higher RPM's would prolly benefit more but in a 346 spinning 6500 I don't think it helped me much over an LS6. Numbers in sig are about what I was expecting with my LS6 and I had hoped to see 430 with the FAST. So draw your own conclusions.......

Detoxx03

iTrader: (14)

Go for it

smok'nZ

iTrader: (160)

id say on a 383 you NEED a ported fast 90

TXZ28LS1

iTrader: (5)

im thinking the same thing as well. im cammed with an LS6 intake and been thinking of getting the fast 92/92 combo. but im going to get heads first. unless i save up enough to get heads and fast intake.

2000_SS

iTrader: (24)

i have a new 92/92 for sale, it would be worth your time and money.

there are professional and independant tests ALL OVER this site about FAST gains. my car, cam only, went from 393rwhp to 417rwhp and went up to 452rwhp with the addition of PRC 5.3 heads....that's with a 231/237 cam....

383vert

iTrader: (4)

thanks for the help. this is all good info. by the way i,m only spinning it to 6000. thats where it peaks. this same top end and cam pulled to 6400 hard as a 346. and by the way how much for fast 92 set up? oh, happy turkey day! and thanks again.

CoopZ06

Ported FAST 92/92 combo cost me $1350 from Ron at Vengance Racing.

CoopZ06

krazy4

iTrader: (5)

It will be worth it!

SOMbitch

iTrader: (8)

6K rpms go LS6. They are nearly equal at 6K. You are looking at a grand for 5 or so HP. I am ready to get flamed but I speak the truth.......