Anyone mount External fuel pump?
- Thread starter koosh
- Start date
You may have to buy a second pump to feed the high pressure pump. One of the manufacturers sold a sump system that could be mounted under the hood to do that.On a 68 Charger with RETURNLESS EFI?
Not a fan of putting this pump back in the tank, but cannot find a place to mount externally and be at or below the lowest point of the fuel tank
Mike
j-c-c-62
Well-Known Member
I know mounting below the lowest point is preferred, but IMO often that is not practical nor very safe on a street driven or any car with a stock located tank.
This is my pump/filter for a carb on a 62 Dart, looking straight up. It is not as close as the pic indicates, but it is a tight fit.
This is my pump/filter for a carb on a 62 Dart, looking straight up. It is not as close as the pic indicates, but it is a tight fit.
Kinda depends on the pump, etc. But I put mine on the inside of the frame, passenger side, just forward of the axel hump - just where it starts to become level. Keeps it low and (in my case) orients the pump correctly. Highly recommend using isolators in the mount.
Just my $0.02... I would recommend a return as well, but I know a lot of people don't like to have to deal with it.
Just my $0.02... I would recommend a return as well, but I know a lot of people don't like to have to deal with it.
6PKRTSE
Well-Known Member
Mine is in the trunk with a return.
Tough to see but I put it in front of the passenger rear tire between the frame rail and the rocker.
What brand "Returnless EFI" is it that you speak of?
Remember, pumps push the fuel., They don't have much suction like the mechanical pumps do. Wonder why all the electric pumps are mounted low and at the rear? There's your reason.
Holley Sniper needs a return. Also it prefers an in-tank pump......pulling fuel from the tank is not efficient....it needs pushing as well.
I know this from experience.
I know this from experience.
Unkle Krusty
Well-Known Member
Used to be we needed to know if the pump pushed or pulled. Suck or blow if you prefer. The mechanical pump on my 318 must suck a lot, from the tank at the rear to the fuel pump, and push up to the carb.
My Bentley had electric pumps at the rear, and I have no idea about modern pumps. Having the pump inside the tank, sounds like a recipe for future work. My 25 gallon tank was not easy to remove and put back in place.
My Bentley had electric pumps at the rear, and I have no idea about modern pumps. Having the pump inside the tank, sounds like a recipe for future work. My 25 gallon tank was not easy to remove and put back in place.
koosh
Well-Known Member
Is that above the lowest point of the tank?
What EFI are you running?On a 68 Charger with RETURNLESS EFI?
Not a fan of putting this pump back in the tank, but cannot find a place to mount externally and be at or below the lowest point of the fuel tank
koosh
Well-Known Member
So are you saying your pump is higher than the lowest point of the tank?
koosh
Well-Known Member
Is that a Charger? Is that pump above the gas tank height?
koosh
Well-Known Member
Atomic EFI
Yes 66 Charger, it's probably 1" below the tank.
No pickup sock in the tank just a pre-filter.
I do use a return line (stock 5/16" steel line), I bought a 3/8 sending unit and drilled/soldered in a 5/16" piece of line for the return.
j-c-c-62
Well-Known Member
It's not only the shortcoming of the pump location that creates the issue, it's the liquid being moved, and with gasoline when the suction lowers the pressure enough, it simply lowers it's boiling point, and add any increase in fuel temp, and that causes problems.
j-c-c-62
Well-Known Member
Yes, I'd guess it's slightly above midway?
And I would be extremely hesitant to locate any fuel components in direct line of tire rotation, because of potential flung roadway debris and having witnessed the damage tire carcasses can do when delaminating at speed.
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it's level with the bottom of the tank
to be clear... the input is level if not slightly below the bottom of the tank.
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