I want to add a fuel filter style surge tank to my Chumpcar.
I purchased a spin on filter housing with 2 inlets and 2 outlets.
Can I just run my stock fuel pump to feed the filter? I have the return from the engine Tee'd to the return from the surge tank all going back to the fuel tank.
The in tank pump feeds into the filter / surge. A second pump pulls from the filter / surge and then into a seperate mounted fuel pump that feeds the engine.
Anybody have a number of a spin on filter that is not too large, is deep and has "standard fuel filter threads"?
Lift pumps (the one that feeds the surge tank from the fuel tank) are usually high-pressure pumps although they don't need to be.
If the filter has 2 inlets and 2 outlets, run the lift pump and the engine return to the inlets, and the engine pump and return to tank on the outlets. Usually the tank return is much higher than the line the engine pump feeds from (so that fuel doesn't drain back to the fuel tank unless the surge tank is full).
GameboyRMH wrote:
Lift pumps (the one that feeds the surge tank from the fuel tank) are usually high-pressure pumps although they don't need to be.
My experience with this tells me this might not be correct, but I might be wrong. I had an A2 GTI 16V with a surge tank from the factory. The in tank pick up pump was low pressure feeding the surge tank, then you had a high pressure fuel pump in the surge tank feeding the fuel distributor.
Your GTI in tank pump could easily do 4bar and feed 200hp. The surge tank/hp pump is to be able to hit The fuel pressure needed for CIS to work (6+bar).
My race car has a regular "high pressure" fuel pump pumping to the surge tank.
The pump rating is "255lph at 80 psi" but that is the potential.... what sets the fuel pressure isn't the pump in a loop system - it's the regulator. The stock regulator was 55psi with that same pump and the mfg thought that was cool. So I take that rating to mean "but can totally supply 255lph at 55 or even 10psi without breaking a sweat". It's been working fine for 2 seasons that way.
I'm running the factory, Civic, in tank, pump to feed the fuel filter surge tank.
What fuel filter are you running?
Thanks for the feedback everybody!
Rob R.
I'm running one of these with the biggest spin on fuel filter I could find. I think it was a Racor from a boat supply store.
I drilled and tapped the center for a pickup to the bottom of the filter.
It's been nastified so it would pass BS judging.
The fuel pump feeding the engine is a cheap Ford pump for a F150 hanging under the intake.
It worked like a charm. We were having starving issues at anything under 3/8 of a tank. This let us burn the entire tank and stretch our stints out to 2.5 hours.
So long as everything is rated for the pressure I don't see why it would matter any.
It does not matter one bit because the system will not be pressurized.
The only difference between high pressure and low pressure pumps is the capability. The pressure itself is not a function of the pump, it is a function of the system it is pumping into.
wvumtnbkr wrote:
What fuel filter are you running?
Thanks for the feedback everybody!
Rob R.
http://www.summitracing.com/parts/sum-230118/overview/
Sorry, meant what filter for the spin on filter type surge tank.
