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Old 02-10-2008, 11:19 AM
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Fuel Pump Question

I have determined I need to replace the manual fuel pump on my small block Chevy 350. I am running a Holley 670 Street Avenger carb. I have looked at what is available for my engine and see that the prices range from $90 down to $43. I am considering the Holley 80GPH pump. But the Summit or JEGS brand appears to be the same and is at least $20 cheaper.

Does any one have experience with these store brands and are they worth a try? Should I be looking a 110GPH instead of the 80? What is the most dependable brand?

The pumps I have looked at:
Summit (80) $43 / (110) $53
JEGS (80) $45 / (110) $55
Holley (80) $64 / (110) $72
Edelbrock (110) $90
Carter (120) $72
Mr. Gasket (80) $60

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Old 02-10-2008, 04:05 PM
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lets say you get 4 miles per gallon
and you average 60 miles per hour
that if i do my arithmetic right is 15 gallons per hour.

if you have a 30 Gal gas tank you can empty it in 22min with
that 80gpH pump.

then again sears has a 6.5Hp vacuum cleaner with a #16 110 v cord
this should be about 50A at 110V

and a 3Hp air compressor with a #10 cord

but then again i dont write ads

how did you determine the fuel pump was bad?
did you check the fuel filter?
did you check the screen in the gas tank?
could the gasline be pinched?
im not real familliar with the carb does it have a sintered bronze filter where the fuel line goes in?
Ive seen the filters on fuel pumps too.

Last edited by PeteTy; 02-10-2008 at 04:25 PM.
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Old 02-10-2008, 06:03 PM
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I guess I need to check all thopse filters!
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Quote:
Originally Posted by PeteTy
lets say you get 4 miles per gallon
and you average 60 miles per hour
that if i do my arithmetic right is 15 gallons per hour.

if you have a 30 Gal gas tank you can empty it in 22min with
that 80gpH pump.

then again sears has a 6.5Hp vacuum cleaner with a #16 110 v cord
this should be about 50A at 110V

and a 3Hp air compressor with a #10 cord

but then again i dont write ads

how did you determine the fuel pump was bad?
did you check the fuel filter?
did you check the screen in the gas tank?
could the gasline be pinched?
im not real familliar with the carb does it have a sintered bronze filter where the fuel line goes in?
Ive seen the filters on fuel pumps too.
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Old 02-11-2008, 07:03 AM
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mechinacal fuel pumps do go bad.

they have a lever that hits the crank

and a pin for the lever to pivot on

and a diaphram the lever will push

theres a spring to keep pressure on the diaphram

and a couple check valves

the diaphram sometimes breaks

the pin the lever pivots on sometimes breaks or wears thru the housing
you will see engineoil around the pin

(a handy guy could drill the arm and the housing and put a bigger pin in)

the check valves sometimes get dirt in em

the mechinacal ones are more like $20 than $90 like the electric ones

if you replace the mechnical one with the electric youve gotta get a plate to cover the hole where the mechinal one usta bolt on... this is a hidden cost that aint mentioned on that $190 lectric fuel pump box.
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Old 02-11-2008, 02:15 PM
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Generally a stock replacement pump will put out all the fuel you will ever need.Unless this is a dedicated race vehicle.
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Old 02-11-2008, 08:32 PM
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Quote:
Originally Posted by barnym17
Generally a stock replacement pump will put out all the fuel you will ever need.Unless this is a dedicated race vehicle.

So who buys these high GPH pumps? There sure a lot of brands and sizes.
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Old 02-12-2008, 10:58 PM
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GM makes a high-performance mechanical pump that costs ~$35. Look for PN 6415325.
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