View Full Version : In Tank Fuel Pump

04-10-2009, 06:16 PM
I have been watching my neighbor install a fuel tank in his no name race car. It has been interesting! Tank has in tank fuel pump.
Has anyone ever tried the same? I was thinking about the summer problem "vapor lock".

04-10-2009, 06:30 PM
Fuel injection 'drove' the marketplace to 'in tank' fuel pumps.
(Mostly to cool the motors that were asked to provide EFI pressures).
But a byproduct of this has been a reduction in vapor lock issues.
Your challenge is to find an 'in tank' fuel pump that has a low enough pressure to prevent flooding issues (unless you run a pressure regulator and return line to the tank.
Yes, it can be done.
But it is overkill as compared to just adding a low psi 'external' electric fuel pump.
If you want to pay for stealth...maybe.

quote:Originally posted by Hank

I have been watching my neighbor install a fuel tank in his no name race car. It has been interesting! Tank has in tank fuel pump.
Has anyone ever tried the same? I was thinking about the summer problem "vapor lock".



04-10-2009, 06:49 PM
Thank you for the reply, as much as I try to keep vapor lock at bay, I also think it may be over kill. I just had to get another opinion.

04-10-2009, 06:58 PM
have you ever tried to wrap you fuel line with something like fiberglass header wrap?


63' R1 Wagonaire

63' 8E45 Detroit

53' 2R5 R1 Powershift TT Under Construction

57' Transtar 304 NP540 4:09 TT Under Construction (in Picture)

58' 3E6D Stock Sale Pending

61' 6E7 122 Factory Auto


04-10-2009, 07:16 PM
I am watching an ongoing project of my neighbor,that is what opened the discussion! To answer your question, I generally think that fiber glass may hold the heat in as the area heats up. My best results have been with clothe pins!

04-10-2009, 08:45 PM
Pretty much from the mid-80's on the car should have an in tank pump.
If you really want on, go to a few salvage yards and measure some of
the cars there, be sure to check filler neck location.

Unless you plan on going EFI, I think its not worth your time.


'63 Avanti, zinc plated drilled & slotted 03 Mustang Cobra 13" front disc/98 GT rear brakes, 03 Cobra 17" wheels, GM alt, 97 Z28 leather seats, soon: TKO 5-spd, Ported heads w/SST full flow valves, 'R3' 276 cam, Edelbrock AFB Carb, GM HEI distributor, 8.8mm plug wires

04-10-2009, 09:02 PM
My neighbor has put $$$$$$$ into this noname project and he is so dead set that on the race track this is the only way too go! He has two other elderly projects, they do not go far either!I think he has a continuing pipe dream if he thinks this thing will work. The car is carburated with all mechanical linkage,so far today was a first day it has run,fuel pump was putting so much pressure, fuel bubbled out of the carb and finally shut down.[thankfully]. He wants to solve my vapor lock the same way he solved his! the comedy continues!

04-10-2009, 09:08 PM
I hope he isnt using a 40 PSI pump, there are 15 PSI, but that is
still way too much for a carb. He needs a pressure regulator on it
ASAP. Probably needs around 5 PSI, but that can vary. They used
to sell adjustable regulators, but I havent looked in years. I used
an electric pump in my '60 Hawk, mounted it up front. It was a 5-10
PSI if memory serves, I used an adjustable regulator to dial it in.


04-11-2009, 04:35 PM
There is also about a 7 pound pump that was used in early Ford Tempo/Topaz vehicles with central fuel injection. I used one of these in a 65 Mustang/ 5.0 EFI project. I hung a high pressure pump on the inside front frame rail and used the low pressure pump in the tank to supply the high pressure pump.

Jamie McLeod
Hope Mills, NC

04-12-2009, 12:57 AM
I believe that Ford also used a low pressure helper pump mounted on the frame rail of the multi tank trucks from the mid 80's, i can do some research if anyone is interested. IIRC it looks alot like a fuel filter with wires coming out of it...

04-12-2009, 07:47 AM
Well the noname car is driving! He wanted PLENTY of gas so he put a return line to compensate for the extra fuel. [My car has a return line which works well for me.]The fuel pump installed puts out about 8lbs. The return fuel line is tied tightly to the supply line to keep the supply line cool.He calls this installation an "external heat exchanger", again the sage continues.