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Old 11-23-2012, 08:22 PM
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holly electric fuel pump

Hey guys

I think im going to run a electric pump on my sbc build instead of a mechanical because of clearance issues. My question is do I need to or should I run the oil pressure saftey switch. ?? Unless anyone knows of an aftermarket mechanical that will fit. I tried putting a holly mechanical on it a while back and the body of the pump hit on the motor mount.

Holley Performance Products 110 GPH "Blue" Electric Fuel Pump With Regulator*12-802-1

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Old 11-23-2012, 08:39 PM
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I run the same pump, separate switch so it doesnt have to run with key on. Set regulater 5-6 lbs if you are running a Holley 4 BBL
And mount the pump near the tank.
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Old 11-23-2012, 09:01 PM
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Thanks Richiehd. Just so im clear. You have yours wired on a toggle switch and as long as the pressure is regulated to 6-7 psi it wont push fuel past the needle valves in the carb? no issue having the pump in the on postion with the car not running for a minute or two?? What is the pupose of the saftey switch?? incase you lose oil pressure for some reason to avoid harming your motor?? or have a needle valve fail while the car is running and catching on fire??
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Old 11-23-2012, 09:08 PM
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Also. Do I need to run a relay??
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Old 11-23-2012, 09:30 PM
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relay , yes..

the oil psi switch is so it's not pumping fuel if the engines off, like in a wreck you'd want the pump to stop pumping fuel incase there is a leak
also the fuel COOLS the pump. if it's on and the fuel isn't flowing, it'll heat the fuel and kill the pump
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Old 11-23-2012, 09:46 PM
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I currently run a mechanical pump but I once owned a 91 T-Bird with an electric pump. It had a relay in the trunk which would trip off if jolted, like in a collision (or even throwing something against it accidentally - don't ask). It was easily reset with a push button. I assume they're quite common in production cars. I always thought it would be a good idea were I ever to run an electric pump and I bet you could pick one up dirt cheap in a junkyard.
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Old 11-23-2012, 10:09 PM
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IIRC that's a fuel pump inertia switch.
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Old 11-23-2012, 10:48 PM
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I do not trust Holley fuel pump. They have habit of leaking. The fuel pump are very noisy, too. I prefer the Carter electric fuel pump. They are very quiet and totally sealed.
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Old 11-24-2012, 01:16 AM
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hmmmm. I think i would perfer to run a mechanical pump. Does anybody know of an aftermarket brand that will fit my application. its a mid 70's block with the clamshell type mounts. I tried a holley a while ago and the body of the pump hit on the motor mount. I saw a post a while ago regarding the same thing and a guy posted a pic of the same application but an edelbrock pump that he had mounted. Maybe ill pick up an edelbrock and try it. Anyone know if the body of the edelbrock is smaller than the holley??
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Old 11-24-2012, 06:11 AM
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holly electric fuel pump

What kind of car is this in? What part of the pump hit on the motor mount. The body has screws in it so that it rotates the inlet and outlet from contacting anything. Most all the mechanical pumps are the same size.
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Old 11-24-2012, 06:40 AM
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If there is any way to figure out how to mount a mech. pump, do it. If not - there ARE better choices then a rattlin', failure prone Holley. Additionally, they too van be a PITA to find a mounting place and still be safe.

Yes, you should run a fail safe switch with any electric pump
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Old 11-24-2012, 08:41 AM
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Holley blue electric fuel pump

Put same pump on me 30 foot boat with a 454 Chevy. ....warmed up did a full tilt...boat fell on it's face = ran out of fuel.
Yes, it was 2 inches below tank and 12" away.
Installed a Carter like ones I used in the drag race days, 1957 to 1969.....not problems.
You must locate electric pumps with in 2 feet of tank & at same level or lower than tank.
Use #14 AWG conductor. Run a #14 dedicated ground to battery...not the frame or floor board.
Yes on the oil pressure safety switch with a 30 amp relay.
If a toggle switch is used be certain it will carry the load 15 amps.
Jim, School of Hot Rod Hard Knocks, 1957
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Old 11-24-2012, 08:43 AM
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Holley blue pump.

I am not a fan of electric pumps if OEM mechanical pump will work.
Application = street rod.
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Old 11-24-2012, 09:24 AM
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I have run the blue Holley electric pumps for years and have never had a problem, I run a toggle switch and a relay with it, I have never used an oil pressure switch because if you lose oil pressure and the pump stops it takes some time for the bowls to run dry, it will be to late in some cases.
I'm not trying to promote Holley pumps but I've good luck with them.

Mark.
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Old 11-24-2012, 09:58 AM
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Quote:
Originally Posted by 1BAD78TA View Post
I have run the blue Holley electric pumps for years and have never had a problem, I run a toggle switch and a relay with it, I have never used an oil pressure switch because if you lose oil pressure and the pump stops it takes some time for the bowls to run dry, it will be to late in some cases.
I'm not trying to promote Holley pumps but I've good luck with them.

Mark.
+ they are rebuildable... mine is 20+ years old.. can't hear it over the exhaust..
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