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Scott Heidt
03-22-2004, 11:51 AM
Hey Guys. Ok here is the rundown.
Just installed a new 502 long block ( I was told this engine requires an electric fuel pump), 425 hp, stock cam, rectangular ported heads, Holley 750 with a Holley intake manifold. The fuel pump that was sent with the engine isn't cuttin it. I need to order a new one. I went online and saw that Holley has a marine fuel pump that might work, but the GPH seems high for what I need. The lowest one I saw was 67 gph at 5psi and the preset is 7 psi. My thoughts were to use that and get a fuel pressure regulator from Holley with a 4 1/2 -9 psi range. Does psi relate to fuel flow (ie. higer psi = higher gph). Does a regulator put a strain on the pump by restricting flow?

I am not familiar with all the aspects of electric fuel pumps and the best way to regulate fuel flow properlly so the engine isn't starving for fuel. I am at work today, but will check the boards before 5:00 pm. I need to get this worked out before The Mount Dora gathering this weekend. Thanks!

BUIZILLA
03-22-2004, 11:57 AM
What Holley part # are you looking at with those spec's?

J :cool:

ITTLFLI
03-22-2004, 12:57 PM
Aeromotive Marine w/ regulator! (non marine model--hp1000) By far the best!

Use loctite on the Holley regulator lock nut if you use it! I leaned my 502 out because that nut came loose! :eek!:

tmdog
03-22-2004, 02:18 PM
Installed a Mallory last year, no regrets.Burned up Holleys the last two I had. Try summit parts for best price on mallory pump.

tmdog
03-22-2004, 02:22 PM
The Holleys I smoked were the blue w/ reg.

Scott Heidt
03-22-2004, 02:58 PM
What Holley part # are you looking at with those spec's?

J :cool:
The part number is a 712-801 67 gph at 5 psi with a 7 psi preset.
The regulator was a 12-501 4 1/4 to 9 psi range.

I'm not even sure if I need a regulator. It sounds like the Holley has an adjust ment.

Scott Heidt
03-22-2004, 02:59 PM
Installed a Mallory last year, no regrets.Burned up Holleys the last two I had. Try summit parts for best price on mallory pump.
I'll look into it! Thanks!

BUIZILLA
03-22-2004, 03:11 PM
The 12-801 Holley pump has a built-in regulator. It also asks that a 12-810 cutoff switch be used as well. And, it says it flows 97gph, not 67gph...

I like the Mallory 110 or 140 maybe, with a built in regulator.

J :yes:

Scott Heidt
03-22-2004, 03:17 PM
The 12-801 Holley pump has a built-in regulator. It also asks that a 12-810 cutoff switch be used as well. And, it says it flows 97gph, not 67gph...

I like the Mallory 110 or 140 maybe, with a built in regulator.

J :yes:

This is the spec on the Holley Website. I will look into the 110 or 140. Cool. Thanks!
FUEL SYSTEMS


67 GPH Electric Fuel Pump


Part #: 712-801





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HI RES PHOTO - CMYK JPEG




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Features
Flows 67 gallons per hour at 5 psi
Pressure pre-set at 7 psi
Regulator not required
Pressure relief valve is externally accessible
Pump design is more tolerant of contaminated fuels
Total pump weighs less than 3 lbs.
Includes mounting bracket
3/8" inlet and outlet ports
Fuel/fume tube provision
Motor draws only 2 amps.
7-1/2 Amp fuse recommended
Repair kits are available
Meets U.S. Coast Guard regulations
Not designed or recommended for use with fuel injection systems

ITTLFLI
03-23-2004, 07:13 AM
Here is the Aeromotive marine......

eddie marine/aeromotive pump (http://www.eddiemarine.com/cart/details.asp?SubCategoryID=777&CategoryID=133)

Scott Heidt
03-23-2004, 12:11 PM
Here is the Aeromotive marine......

eddie marine/aeromotive pump (http://www.eddiemarine.com/cart/details.asp?SubCategoryID=777&CategoryID=133)
Cool! Thanks. I'll check it out.