350 HRSS

Hey all!

I have been looking at these, and have a few questions. On Tbyrne's site, I seen a note that said the 90mm TB and intake was only recommended for stroker motors. Why is that? Would it hurt the performance of a non-stroked motor? I have most of the bolts ons, cam, headers, K&N, etc. I figure if I am going to spend that $$, to get the 90mm in both while I am at it.


I need some opinions on this. I also seen some excellent prices on ebay, when I did a search for them.

How many of you have the 90mm set up on your stock motor? Anyone dynoed these and seen significant improvements?

Thanks!

iamsickofitall

you won't see any peak gains and you will lose some power down low if you put a 90mm intake on a stock cubed motor.

if you had ported heads, you would see decent peak gains with less loss down low.

350 HRSS

Then the 78 is the way to go then, correct?

What kind of gains should I see w/ the 78 intake and 78 tb? Btw, the cam is a LS1 hot cam.

iamsickofitall

i would go with an LS6 intake manifold and a ported stock throttle body unless you can get a FAST 78mm for equal price. the FAST will give your <5rwhp over an LS6 intake.

you should expect 10-15rwhp with the LS6 over the LS1 with the RARE 20+rwhp occurence

teke184

i agree...i don't think the cost of the FAST be justified by significant gains.

if you REALLY want to upgrade the intake, a middle ground setup that still yields great gains is something from TPIS. they turn the LS6 intakes into a 90mm TB.