I have the stock cat-back and a RMM DP and I hit 22psi before. I can hit 18psi+ without a problem, although the stock cat-back does cost me some power. I usually run ~113mph traps, I took the cat-back off and ran an open DP at the track once and ran 116mph traps, so a free flowing cat-back defently will give some power over stock.
The stock cat-back flows fairly well. I ran an [email protected](with a 1.68 60' time) with the
headlight in. The next week I came back with
the headlight out and a Greddy SP cat-back and
my mph improved to 119.25. Probably picked up
~20 hp from the cat-back. This was on 19-20 lbs boost.
My 94TT is BPU+ and I just got a Haltech Elite 2500 to go standalone. Sticking with stock fuel (upgraded injectors though) for now, and would like to drop in a fuel-pressure sensor somewhere. Is there any easy spot to do that ? Maybe the banjo/union bolt on the existing fuel-pressure...
After I have installed all the new seals, BCsprings, retainers, locks and buckets,
with T-belt off, put crank at -10 btdc so all pistons are slightly down, install new BC 272 cams, install cam gears, torque cams as per manual. Then turn CAMS clockwise to tdc notches, and than turn CRANK to tdc...