Fuel Pump
Thread Starter
Intermediate
Joined: Dec 1999
Posts: 42
Likes: 0
From: Carlsbad CA
Fuel Pump
What kind of fuel pumps do you guys run? I have a stock Carter on my 300hp 67. Will a hi performance street pump from Holly, Edelbrock or Carter improve performance? Hurt gas mileage?
Thanks
Thanks
Melting Slicks
Joined: Aug 2000
Posts: 3,077
Likes: 2
From: The Garden Spot of the Garden State
Re: Fuel Pump (davo32)
....fuel is metered into the engine by demand on the carburator so it draws on the reservoir in the fuel bowl...the fuel bowl volume is controlled by the float and carb inlet valve...the high pressure side of your fuel system is just before that inlet valve meaning that the fuel pump needs to have just enough pressure to keep up with the highest demand of the carb - so unless your car is draining the carb bowl dry, a higher pressure fuel pump will give you nada....
...in fact, if you don't have very good o-rings sealing the inlet valve, a high pressure fuel pump will cause fuel blow-by and flood the engine, and in the most servere cases, cause raw fuel to pour out the venturis (and sometimes straight UP the vent stacks), causing the ignition of a bright orange/yellow flame OUTSIDE of your engine.....uh, not good
...unless you need the high pressure, stick with a stock pump rated for your engine
[Modified by Kid_Again, 9:04 AM 2/2/2002]
...in fact, if you don't have very good o-rings sealing the inlet valve, a high pressure fuel pump will cause fuel blow-by and flood the engine, and in the most servere cases, cause raw fuel to pour out the venturis (and sometimes straight UP the vent stacks), causing the ignition of a bright orange/yellow flame OUTSIDE of your engine.....uh, not good
...unless you need the high pressure, stick with a stock pump rated for your engine
[Modified by Kid_Again, 9:04 AM 2/2/2002]
Racer
Joined: Jan 2002
Posts: 290
Likes: 0
From: milwaukee wi
Re: Fuel Pump (magicv8)
magic, i'm with you. i run a holly electric, both for the shut off security, but also so i can crank the engine when i work on various thins, without flooding it. wouldn't go back to a mechanical.
Melting Slicks
Joined: Aug 1999
Posts: 2,848
Likes: 3
From: Atlanta, Ga, Fulton
Re: Fuel Pump (Kid_Again)
Kid
Great grasp of the basics. For a guy with all that sophisticated hardware like DI and 3x2 you still have not forgotten the basics!!!
What a guy. Virtual Beer to you!
Great grasp of the basics. For a guy with all that sophisticated hardware like DI and 3x2 you still have not forgotten the basics!!!
What a guy. Virtual Beer to you!
Melting Slicks
Joined: Aug 2000
Posts: 3,077
Likes: 2
From: The Garden Spot of the Garden State
Re: Fuel Pump (TheOman)
...TheOman....hey, thanks, appreciate it :yesnod: ......unfortunately i only learn this stuff the hard way :cry
......the tim allen approach of "more power" doesn't usually work unless you have a pretty good respect for the basics....btdt
......the tim allen approach of "more power" doesn't usually work unless you have a pretty good respect for the basics....btdt
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Le Mans Master
Joined: Nov 2000
Posts: 7,246
Likes: 21
From: Going too fast over the hill. Iowa
Re: Fuel Pump (Tom/99)
I use electric because I had a new mechanical AC pump installed before a 4000 mile trip and it cracked internally in Montana. I limped to Jackson Hole and paid a fortune to get it replaced. The AC pump before it and the one after it leaked at the gasket and fittings. The mechanical pump is in a ridiculous place, and the line runs next to the lower radiator hose to promote vapor lock. If you are not having trouble, you are VERY luck or drive VERY little.
Race Director
Joined: Jan 2002
Posts: 15,352
Likes: 2,725
From: Close to DC
C2 of the Year Finalist - Modified 2020
Re: Fuel Pump (magicv8)
A standard fuel pump is all you need. My motor is tweaked all around, goes 13.6 ET, pump is OTC replacement from Carter. If it fails you can get on anywhere in the US. enjoy!
....just drive 'em! Dennis, TOY-1
....just drive 'em! Dennis, TOY-1
