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Holley Blue Fuel Pump Question

Old 08-26-05, 05:17 AM
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Holley Blue Fuel Pump Question

Hi fellow racers

I have just finished installing a Holley Blue electric fuel pump.
The problem is that, on the new Fuel Safe enduro cell there are no return-line
It has a pick up and a roll-over valve/vent. I know i cant connect the return line to the valve/vent as that will make a huge vaccum inside the cell, to the point at where I cant get the refueling lid off(yeah i tried it).

Backto the main question... Do the Holley Blue pump really need a return line? Or will it stop feeding the carburettor when it has reached the set fuelpressure?

Thanks in advance
Kim
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Old 08-26-05, 07:32 AM
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The pressure on the Holley blue is too much for a carb. Carbs are good for 6psi max. holley reds are 5-7 psi while the blues are 14psi+ . you will need to have a return.
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Old 08-26-05, 09:37 AM
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I use a Holly Blue with a Fuel Safe cell. You don't mention what carb you are going to, but I use a 48 IDA with the fuel pressure set to 4.5 lbs. I use a Holly fuel pressure regualtor to set this. I had to cut down the spring in the regulator to get fine adjustment at low pressure. With this set up there is no need for a return line.

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Old 08-26-05, 09:38 AM
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Or stick a regulator in there. Or replace the spring in the side of the pump with the one from a Red pump. That will lower the internal pressure the pump will reach before the check ball opens and recirculates the fuel. Just buy the $30 regulator and plumb it in the loop, then you dont need a return line.
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Old 08-26-05, 09:42 AM
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I use an IDA too, the reason i thought it needed a return is that the carb has a return nipple.
So as Im running the regulator too, I dont need a return line and therefore will have to block the carb return nipple... Right
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Old 08-26-05, 09:56 AM
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Originally Posted by rocost
I had to cut down the spring in the regulator to get fine adjustment at low pressure. With this set up there is no need for a return line.

Ron

What brand of fuel pressure regulator are you using?


****IDA lovers forum *********************
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Old 08-26-05, 10:23 AM
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You can add a return line to the cell. Remove the access panel, drill it, and install the bulkhead fitting of your choice.
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Old 08-26-05, 12:36 PM
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Originally Posted by C. Ludwig
You can add a return line to the cell. Remove the access panel, drill it, and install the bulkhead fitting of your choice.
Im not quite sure that would pass Tech, modifying FIA stuff is a nono in this class
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Old 08-26-05, 12:39 PM
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Thanks for helping out.
Guess i will eliminate the return line then.
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Old 08-26-05, 02:45 PM
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Have you ever had the cell apart and looked at it? That's the way they are made.
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Old 08-27-05, 01:39 AM
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I have a Holly 465 and i just upgraded from a red to a blue (my red took a **** and took about 6 fuses with it before i tracked down the problem). I have a Holly FPR set as low as it'll go, but it still reads 10psi. i think the gauge i bought might be FUBAR because it won't drop below 10psi, even with the screw removed from the top of the fuel pressure regulator. is this normal with the holly FPR, that it won't go below 10psi, or should I replace the gauge and see what it reads?
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Old 08-29-05, 12:51 PM
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I use a Holley regulator, but I can't remember if it is a HLY-12-803 or an 804. The 804 only goes to 4 lbs, so I probably have the 803. I had to cut the spring down to get it to go to less than 5 lbs. As it came out the box it was pushing fuel past the needle and seat in the IDA. Once the spring was cut it was able to go down to just over one pound.

Ron
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