WHAT TYPE OF FUEL PUMP FOR DRAG RACING

Old 09-07-2010, 12:27 PM
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JEFF69Z28
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Default WHAT TYPE OF FUEL PUMP FOR DRAG RACING

I have a holley blue pump, 8an to regulator then 6 to carb.regulator is a aeromotive brand.Monday at the track when i launched the car fuel gauge went from 7/7.5 psi to 3 psi motor almost shut off and i just idled down the track..adjusted to 8.5 psi launched it gauge went to 6 psi hesitated a little but otherwise went down the track at 6 psi,could my pump be going bad,regulator bad or do i need a better pump.
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Old 09-09-2010, 12:36 AM
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cepx111
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Give us some engine specs, carb size and so on.

Are you sure it's a fuel delivery problem and not some other problem?


Is this a new set-up?

A holley blue pump should be fine for a mild to built motor but not for some heavy breathing twin turbo set up :wink:

8.5PSI is on the high side and its normal to see a pressure drop when both needles open up.

Cp
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Old 09-09-2010, 02:52 AM
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JEFF69Z28
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Originally Posted by cepx111
Give us some engine specs, carb size and so on.

Are you sure it's a fuel delivery problem and not some other problem?


Is this a new set-up?

A holley blue pump should be fine for a mild to built motor but not for some heavy breathing twin turbo set up :wink:

8.5PSI is on the high side and its normal to see a pressure drop when both needles open up.

Cp
406 SBC,11.5 COMP.,264/260 688/678 COMP CAM SOLID ROLLER LIFTER,AFR 210 FULLY PORTED,SUPER VICTOR PORT MATCHED,PRO SYSTEMS 850CFM CARB,8 INCH ATI CONVERTER,TURBO 350,4.56 GEAR.8AN FROM CELL TO FILTER,PUMP,REGULATOR THEN SINGLE 6AN TO CARB.
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Old 09-09-2010, 07:58 AM
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spib
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I have a 385 motor,13 to1 same heads as you, cam is 683 lift, pro system 4150 carb, super victor, I have blue pump, 8an to pro system regulator,to 8an carb lines, I have fuel pressure set at 8 psi no problems for me so far
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Old 09-09-2010, 09:31 AM
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curtisreed
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How old is the pump? I would probably take it apart and inspect things inside. Is this a new setup or a proven combination that just changed. Everyone knows that blues are not the most powerful pumps but they also have been used successfully for years.
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Old 09-09-2010, 10:13 AM
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JEFF69Z28
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Originally Posted by doorracer
How old is the pump? I would probably take it apart and inspect things inside. Is this a new setup or a proven combination that just changed. Everyone knows that blues are not the most powerful pumps but they also have been used successfully for years.
PUMP IS ABOUT 2.5 YEARS OLD,PROVEN COMBO THAT JUST CHANGED..
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Old 09-09-2010, 11:36 AM
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curtisreed
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I would pull the bottom plate off the pump and see if anything has lodged in there. It has been a long time since I had one apart but I believe there is a built in relief in those. Check filter if you have one, pull and inspect the regulator last.

If you are running the pump off of a long wire from a switch like a lot of people do, make sure none of the connections have corroded and causing a voltage drop. I have always put a relay by the pump and run a larger wire to the relay from the battery so the switch only carries the relay coil. It will can a huge difference in the speed of the pump.

Just a few things off the top of my head.

Curtis
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Old 09-09-2010, 10:06 PM
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cepx111
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Originally Posted by JEFF69Z28
Originally Posted by doorracer
How old is the pump? I would probably take it apart and inspect things inside. Is this a new setup or a proven combination that just changed. Everyone knows that blues are not the most powerful pumps but they also have been used successfully for years.
PROVEN COMBO THAT JUST CHANGED..
What all was changed from your old combo?
Good info Curtis :wink:
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Old 09-10-2010, 03:42 AM
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JEFF69Z28
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EVERYTHING IS THE SAME JUST ACTED UP MONDAY.
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Old 09-10-2010, 03:43 AM
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JEFF69Z28
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MY LIQUID FILLED GAUGE WILL IT WORK IF I DUMP OUT THE LIQUID?
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