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Author Topic:   need help with fuel pressure loss
stoker
Gearhead

Posts: 159
From: folsom,cal,
Registered: Jan 2002

posted 05-22-2002 05:29 PM     Click Here to See the Profile for stoker   Click Here to Email stoker     Edit/Delete Message   Reply w/Quote
have mallory comp electric at tank (110).should i try to add 130 GPH mechanical or will they fight each other.dont want to spend over 80.00.it drops to 3.5 or 4 on hard run (carb is 650 2 pump mech.)

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V8 Thumper
Gearhead

Posts: 4681
From: Phoenix, Arizona
Registered: Dec 2001

posted 05-22-2002 07:28 PM     Click Here to See the Profile for V8 Thumper   Click Here to Email V8 Thumper     Edit/Delete Message   Reply w/Quote
What size fuel line do you run?

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Moneymaker
Administrator

Posts: 27499
From: Lyons, IL, USA
Registered: May 99

posted 05-22-2002 07:51 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
The Mallory should be fine all on it's own.

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stoker
Gearhead

Posts: 159
From: folsom,cal,
Registered: Jan 2002

posted 05-23-2002 02:41 PM     Click Here to See the Profile for stoker   Click Here to Email stoker     Edit/Delete Message   Reply w/Quote
i upgraded pickup tube in tank to 3/8 and i did test ussing origanal 5/16 line from pump output to carb.it flowed real close to barry grants flow test (one gal in 37 seconds for 12 second car)but i dont like seeing guage drop from 7.5 psi to 3.5 on hard pass.looking for cheap easy fix.maybe pump needs rebuild,been around for a while!

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