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04-05-2020, 06:31 PM | #1 |
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Join Date: May 2010
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Fuel Pump rebuild/test
Just rebuilt a EV-8 Holley fuel pump, (see photos), with a NAPCO kit, (made in Japan). Is there a way to bench test a fuel pump to see if it works ok ?
The reason I ask is the rocker arm and lever are different than the originals. See photo. The top one is the 2 piece Napco. The middle 2 piece one was in 1 original Holley, and the bottom one piece arm was in another original Holley. The Napco has a hole slightly larger than the pin, the #2 version has a much larger hole than the pin, and #3 version has an elongated, oval hole. Thank you Fordbarners. |
04-05-2020, 07:35 PM | #2 |
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Re: Fuel Pump rebuild/test
Top and middle are the same basically....the Holley requires a hardened bushing. Bottom arm is the latest style . Pretty much all off shore pumps use this arm....seems to work
ok. If there is a choice I like the Holley arm with a bushing....more substantial. IMHO my test motor is invaluable, in lieu of possessing vintage Ford test equipment. Charlie ny |
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04-06-2020, 11:33 AM | #3 |
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Re: Fuel Pump rebuild/test
Got a PM asking where you get the NAPCO 11A-9349 kit. Joe's Antique Auto.
Here is blowup of the pump to aid in rebuilding. Charlie NY rebuilds them, and recommends the Holley arm w/bushing. See attached photo blowup of the pump from the green bible showing the bushing. The kit just uses a pin and arm, no bushing. I didn't test the pin or arm, by the appear to be hardened. |
04-06-2020, 07:39 PM | #4 |
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Location: Ashland KY
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Re: Fuel Pump rebuild/test
I’m working on a early pump now,and used a mighty mite to draw vacumn on suction, didn’t hold a vacumn,changed gasket on top and around screw,got a little better,them plugged out let of pump and held vacumn,might need to check the check valves next or the
dia,,have a new kit but just checking it first. Don
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DON P |
04-06-2020, 08:57 PM | #5 |
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Location: McMinnville, TN
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Re: Fuel Pump rebuild/test
As Charlie does, the ONLY way to test them is on a engine or a KRW wilson tool meant to test them. I am fortunate enough to have a test stand engine, and I usually use the KRW tester. You'd be surprised how many test well by hand but on a engine won't pump due to arm travel issues, related to the arm or diaphragm.
But..... With the Napco kit you should be fine.. I personally do not like the check valves in the kit but otherwise, very good. We stock them in large quantities and I just swap the valves out for something I like a bit better. On the Napco kits you usually should slightly grind a small amount off of the 'hum" on the arm or it can bind in a diaphragm. |
04-07-2020, 03:04 AM | #6 |
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Re: Fuel Pump rebuild/test
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