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Thanks - Now see red! Next?
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Posted by Keith S [Email] (more from Keith S) on Mon, 24 Dec 2001 13:44:43 Share Post by Email
In Reply to: Getting to APC box on '88 9000T?, Keith S, Sat, 22 Dec 2001 19:44:43
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Thanks everyone for guiding me through removing airbox restrictions, descreening MAF, doing 1/4 turn tightening APC F,P potentiometers and tightening the screw on the fuel pump cutoff switch. This free package really improves throttle response, reduces turbo lag and gives a couple pounds more boost. The boost guage needle goes 1/4" or so into the red zone, while previously the needle would stop just before the red zone.

Gosh, now when I think of the possibilities of bigger injectors, modified APC boxes, rising-rate pressure regulators, its a challenge thinking of which way to go. I'd say the car is now at the limits of the stock fuel system and this needs to be addressed before going further.

I like the idea of keeping the fuel pressure near stock and going with bigger injectors, but then there's the issue of part-throttle driveability which to me is very important.

If I go with bigger injectors, would 24lbs injectors w/adj. rising rate regulator be the best compromise? 200whp is the goal, and I want to do it without resorting to 80-90psi fuel pressure and without having to put up with subpar driveability.

If 24lbs injectors is cutting it close, has anyone used 30lbs injectors and maintained stock part-throttle driveability by only adjusting the potentiometer on the mass-airflow sensor?

Thanks in advance,
Keith.

posted by 205.188.200.1...

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