fuel pump interchange question
07-27-2002, 10:31 AM
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Car: '87 Camaro LT
Engine: 355 L98
Transmission: T56
fuel pump interchange question
i need to know if a tpi pump is a direct replacement for an in-tank lg4 pump or do i need the whole sender too? thanks
07-30-2002, 02:24 AM
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A TPI pump puts out over 40psi, which would basically turn your QuadraJet into a fuel fountain. IF I remember correctly, my LG4 mechanical pump is putting out between 5 and 6. It's gotta be somewhere around there, cuz my Edelbrock 1406 likes it, and they flood over 6psi.
07-30-2002, 03:42 AM
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Car: 1988 GTA
Engine: 5.0 TPI
Transmission: T5
Axle/Gears: 9 Bolt, 3.45
Lg4s do not have an in-tank pump, it is instead a mechanical fuel pump mounted on the lower passenger side of the block and driven via a pushrod which rides on the fuel pump lobe on the cam.
07-30-2002, 07:15 AM
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Car: '87 Camaro LT
Engine: 355 L98
Transmission: T56
LG4s do in fact have an electric in tank pump which is low pressure, I don't know if they all did but my '87 does. I'm converting to fuel injection, hence the reason for switching pumps. I know a guy that converted from TPI to carb and left his stock pump in, well his car caught fire!
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