How to quiet holley electric pumps down.
Thread Starter
Race Director
Joined: Nov 2000
Posts: 11,872
Likes: 12
From: Waterloo ontario Canada
How to quiet holley electric pumps down.
I believe in electric pumps but not their reliability. I always run 2 with seperate switches and like a plane check each pump by itself when running.
Anyway electric pumps can be noisy so I got these dampeners. They are used but can be bought from any bolt supply house. They have a variety of dampeners. YOu just need one with the right bolt pattern
These are two flanges joined to gether with an inch of rubber.
I put a bolt through the center of one flange and bolt it to the frame. I bolt the pump to the other flange.
I do not hear my pump when the motor is running and only a slight buzz when priming before starting
These are old
Anyway electric pumps can be noisy so I got these dampeners. They are used but can be bought from any bolt supply house. They have a variety of dampeners. YOu just need one with the right bolt pattern
These are two flanges joined to gether with an inch of rubber.
I put a bolt through the center of one flange and bolt it to the frame. I bolt the pump to the other flange.
I do not hear my pump when the motor is running and only a slight buzz when priming before starting
These are old
C6 the C5 of tomorrow
Joined: Nov 2000
Posts: 6,665
Likes: 2
From: Twin Cities Minnesota
Oh My answer was to buy a Mallory pump...
also the shock mounts for an MSD 6AL box work great. they are smaller with a stud on one end and a threaded hole on the other. So all you have to do is replace your current bolt with the isolator
also the shock mounts for an MSD 6AL box work great. they are smaller with a stud on one end and a threaded hole on the other. So all you have to do is replace your current bolt with the isolator
Drifting
Joined: Jan 2002
Posts: 1,500
Likes: 0
From: N.Y
Originally Posted by 427V8
Oh My answer was to buy a Mallory pump...
also the shock mounts for an MSD 6AL box work great. they are smaller with a stud on one end and a threaded hole on the other. So all you have to do is replace your current bolt with the isolator
also the shock mounts for an MSD 6AL box work great. they are smaller with a stud on one end and a threaded hole on the other. So all you have to do is replace your current bolt with the isolator
me 2
Team Owner
Joined: Feb 1999
Posts: 34,447
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From: Republic of Texas
Norval, I'm suprised you can even hear your after start up. As so as I turn the switch I hear it kick on and 2 seconds later after the car fires the exhuast drowns out the noise. You would think between the exhaust and the blower wine you wouldn't be able to hear it? 
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Race Director
Joined: Sep 2002
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From: San Diego - Deep Within The State of CONFUSION!
Holley pumps are the noisiest there are. Replace w/an ACCEL or another brand. This referring to a Holley Blue. If it is a Holley Red pump, for a carbureted car, then it should be quiet enough with proper insulation.
Le Mans Master
Joined: Mar 2004
Posts: 7,423
Likes: 1,458
From: Little Rock AR
Originally Posted by norvalwilhelm
I believe in electric pumps but not their reliability. I always run 2 with seperate switches and like a plane check each pump by itself when running.
Anyway electric pumps can be noisy so I got these dampeners. They are used but can be bought from any bolt supply house. They have a variety of dampeners. YOu just need one with the right bolt pattern
These are two flanges joined to gether with an inch of rubber.
I put a bolt through the center of one flange and bolt it to the frame. I bolt the pump to the other flange.
I do not hear my pump when the motor is running and only a slight buzz when priming before starting
These are old
Anyway electric pumps can be noisy so I got these dampeners. They are used but can be bought from any bolt supply house. They have a variety of dampeners. YOu just need one with the right bolt pattern
These are two flanges joined to gether with an inch of rubber.
I put a bolt through the center of one flange and bolt it to the frame. I bolt the pump to the other flange.
I do not hear my pump when the motor is running and only a slight buzz when priming before starting
These are old
You can alternately hang the pump from a piece of rubber but be sure to run a ground cable from the pump to the frame.
-Mark.
Team Owner
Joined: Jul 2004
Posts: 40,239
Likes: 786
From: Redondo Beach, California
Originally Posted by norvalwilhelm
I believe in electric pumps but not their reliability. I always run 2 with seperate switches and like a plane check each pump by itself when running.
Can you describe where you mounted your fuel pumps? I do have one of those Holley pumps (that don't seem to have a good reputation with some forum people) and I was thinking about a bracket on the frame that would allow the head of the pump to stick up between the fuel tank and the differential crossmember. Now maybe I should start thinking about two "heads."
Thanks
Thread Starter
Race Director
Joined: Nov 2000
Posts: 11,872
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From: Waterloo ontario Canada
Originally Posted by Corey_68
Norval, I'm suprised you can even hear your after start up. As so as I turn the switch I hear it kick on and 2 seconds later after the car fires the exhuast drowns out the noise. You would think between the exhaust and the blower wine you wouldn't be able to hear it?
Thread Starter
Race Director
Joined: Nov 2000
Posts: 11,872
Likes: 12
From: Waterloo ontario Canada
Originally Posted by 68/70Vette
I've been thinking about a dual electric pump setup (for reliability). How did you plumb the dual setup? For instance, I imagine the simple way would be to have 2 pumps in parallel, pumping into a common fuel line going to the engine. But if one pump is operating, and the other is not, is there a concern that the active pump will also start pumping fuel back throught the non-operating redundant pump and just cause it work excessively hard?
Can you describe where you mounted your fuel pumps? I do have one of those Holley pumps (that don't seem to have a good reputation with some forum people) and I was thinking about a bracket on the frame that would allow the head of the pump to stick up between the fuel tank and the differential crossmember. Now maybe I should start thinking about two "heads."
Thanks
Can you describe where you mounted your fuel pumps? I do have one of those Holley pumps (that don't seem to have a good reputation with some forum people) and I was thinking about a bracket on the frame that would allow the head of the pump to stick up between the fuel tank and the differential crossmember. Now maybe I should start thinking about two "heads."
Thanks
I did away with the stock fuel system. I welded two new 1/2 inch outlets to the tank bottom, one at each corner and yes a gas tank is easy to weld at home. I use air conditioning solder.
Anyway two oulets into twin fuel filters into twin holley pumps into a common 1/2 inch fuel line. I run one pump at a time unless I want extra line pressure.
I run the best regulator that holley makes , no return line.
With both pumps line pressure is 16 pounds , fuel pressure after regulator 6 pounds.
One pump on the line pressure sits at 6 pounds and fuel pressure to carb sits at 6.
I alternate the pumps to make sure both are working and both do not sieze.
I do the same on the mustang, exactly the same.
Safety Car
Joined: Oct 1999
Posts: 4,101
Likes: 10
From: NorCal
I used a Holley blue in my '64 GTO Drag car and simply used a pair of shock bushings on each side, like a sandwich. It was bolted right to the body and could not be heard while the engine ran.
Hans
Hans
Melting Slicks
Joined: Dec 2000
Posts: 2,635
Likes: 0
From: Union Ontario
Originally Posted by norvalwilhelm
My car is quieter then you think. I don't like noise and if I could quiet the blower whine down I would.
Yup is quiet... probably more quiet than my old 350 was with hookers on.
