Fuel pressure
03-04-2004, 10:32 PM
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Fuel pressure I just installed my fuel pressure and boost gauges in my 2001 corvette with 6300 miles on it,when the car is at idle the pressure is at 50# and boost is at 20 I thinking the boost is ok but the fuel pressure is a little concerning.The car has a LPE head and LPE GT2-3 cam with 50# injectors and an ATI supercharger with 7psi. Would a new fuel pump help this out because the pump is stock. 
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03-05-2004, 05:17 AM
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20 PSI is WAY too low with boost (50 @ idle is also on the low side). Don't drive in positive pressure until you fix this. You are probably running dangerously lean if that 20 PSI number is correct (make sure the guage is working properly). You should upgrade your fuel pump, check the fuel filter and FPR ASAP.
03-05-2004, 06:21 AM
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I'm sorry I should have said that the vaccum was at 20on the boost not fuel pressure.What fuel pump do you sugguest? Are the injectors too big? Also are the injectors making the pressure lower?
03-05-2004, 08:48 PM
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Sorry, I misunderstood your post. I don't think your injectors are too big if you've had the car tuned properly. You really don't need that much injector for your setup, though. Most people seem to go with in-tank Walbro pumps. When I first put the ATI kit on my car my stock pump had some trouble keeping up. I added an in-line Walbro pump which helped but as I increased boost it wasn't enough so I added the in-tank pump (and kept the in-line pump). You should be fine with just a single in-tank Walbro pump.
03-06-2004, 06:06 PM
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