Hi, Car - Saab 900 T16, tweaked APC (turbo charge pressure controller) with 1 bar of boost at moment. Ford Motorsport 30lbs injectors, JR filter, Forge atmo twin-piston dump valve. Timing, mixure all set to spec.
Problem - car at moment has a standard Saab 2.5bar FPR on it. This can't supply enough fuel at high boost, and the APC backs the boost off. I've tried a Saab 3.0bar FPR, this solves the problem of lack of fuel at high boost, but the car runs idles roughly and picks up poorly (until the boost comes in, then it flies) and is really uneconomical.
I've checked the saabcentral and a few other Saabist sites, but there seems to be too much conflicting information - can anyone who knows their stuff tell me whether I should splash out on a rising rate FPR to solve this problem, or can I adjust the one I have? I've heard tales of RRFPRS leaking and all sorts..
cheers Mike