is it ok to install a 90 psi fuel pump an my 93 trans am?
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93 t/a A4 3.23s
95 Formula A4 2.73s >>>>93 t/a 3.23 , !AIR, !cat, !A/C, hotchkis lowering springs, kyb adj shocks, DD
99 Camaro z28 a4, 2.73, !AIR, !A/C
99 Alfa Romeo 166 3.0 v6, red
97 3.8 v6 A4 camaro, hardtop
93 Camaro Z28 M6, hotcam kit, 150 shot, twin plate clutch, eibach pro kit and bilstein shocks, swaybars etc
00 audi a6 4.2 40 valve v8 -
What is a "90psi fuel pump"? A pressure rating means nothing without a corresponding flow number. What you really need to evaluate the suitability of the pump is the full flow vs. pressure curve.
You also need to provide some info regarding the "93 tran am" with regard to peak HP levels, mods, injector size and intended fuel rail operating pressure.Fred
381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motor -
the car is stock
i dont know the flow (lph) for the pump. I know that the pressure in the fuel rail must be 41- 47 psi, so i thought that the pump must provide higher pressure that is adjusted to 41-47 psi by the regulator. is 90 psi too much for the fuel pressure regulator?93 t/a A4 3.23s
95 Formula A4 2.73s >>>>93 t/a 3.23 , !AIR, !cat, !A/C, hotchkis lowering springs, kyb adj shocks, DD
99 Camaro z28 a4, 2.73, !AIR, !A/C
99 Alfa Romeo 166 3.0 v6, red
97 3.8 v6 A4 camaro, hardtop
93 Camaro Z28 M6, hotcam kit, 150 shot, twin plate clutch, eibach pro kit and bilstein shocks, swaybars etc
00 audi a6 4.2 40 valve v8Comment
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The reason you need the flow curve is because you need to know how much fuel the pump will flow at the stock (43.5psi) fuel pressure regulator system.
When my 94 Formula was stock, I had the stock in-tank pump, and a Bosch 205LPH inline pump. Both of them operated continuously, and the stock FPR was able to regulate the pressure to the required 43.5psi with no problems. When the nitrous activated, the fuel pressure was bumped up to 85-90psi by applying a pressure to the vacuum connection on the fuel pressure regulator, and the entire system was capable of flowing the fuel required to support about 450HP at 85-90psi.
So..... it is likely that the stock FPR will be able to handle a "90psi pump" as long as the pump isn't capable of flowing a huge amount of fuel at that pressure. You realize of course, that the pump discharge will probably be no more than 50psi, and the FPR will need to bypass whatever amount of fuel it takes to keep the pump operating at that point on the flow vs. pressure curve.
You need to have some idea of what the pump will flow at 50psi to accurately answer the question.Fred
381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motorComment
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thanks
i ll try to find the pumps flow93 t/a A4 3.23s
95 Formula A4 2.73s >>>>93 t/a 3.23 , !AIR, !cat, !A/C, hotchkis lowering springs, kyb adj shocks, DD
99 Camaro z28 a4, 2.73, !AIR, !A/C
99 Alfa Romeo 166 3.0 v6, red
97 3.8 v6 A4 camaro, hardtop
93 Camaro Z28 M6, hotcam kit, 150 shot, twin plate clutch, eibach pro kit and bilstein shocks, swaybars etc
00 audi a6 4.2 40 valve v8Comment
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