The 87 has an in-tank fuel pump in addition to the on-engine fuel pump. Due to screw-ups, l will not be able to use an on-engine fuel pump. The only way to fix the screw-ups would be to completely teardown the engine. which l want to avoid. Which brings us to our question.

Since the car originally came w/ a q-jet (which l plan on reusing), l figure the in-tank pump can handle the fuel demands. However, lm not sure exactly how l need to plumb the two lines that went to the mech fuel pump. Will l need to concoct a sort of AFPR, or is there a simpler way?

Thanks for any help.

Clayton

 

El Guapo,

In order to avoid destroying the electric pump, you'll need to plumb in a fuel pressure regulator that can manage 4-6 PSI and has a return fuel line.

Without the regulator the pump will overcome the inlet needle valve and constantly flood the carb, and without the return line the pump will dead-head constantly and quickly fail from excessive pressure. Rplacing an in-tank pump is only a little more fun than removing an engine for lack of a pump provision.

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Later,
Vader
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"No matter how hard you try you can't stop us now"
Adobe Acrobat Reader 4.0

 

ok, where can l get one?

There are two different fuel lines that went to the mech fuel pump. One bigger than the other, and one from pump to qjet. My thought is that the smaller of the two is the return line. ls this correct?

Clayton

 

Anyone?

 

Yes on the fuel lines. And any speed shops (local or internet) for the regulator.

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George P. Lara
1994 Z28 LT1 T56
1984 Z28 High Output
Member: SCCA, SCFB, SC3GFB
Chevy Info --> MadMike's