Return below fuel level is best practice in my opinion.
Less chance of losing the lower fractions to evaporation with some fuels.
fuel return to the tank
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Re: fuel return to the tank
hoodeng is right, as I realized some time after posting. Was thinking purely in terms of minimised return flow and later realized the use of a return type fuel pressure regulator was called for, the pill would be problematic as well illustrated in his response.
Cheers
Cheers
Re: fuel return to the tank
Have you been running this set up yet? Has it caused problems?chevyart wrote: ↑Sat Sep 04, 2021 4:06 pm i have a stock gas tank in my 75 vega and had a fuel sump put in it and had a 3/8NPT bung put in in the upper drivers side(towards the front of car) for a fuel return for my mallory 250 electric fuel pump. the return runs right from pump to the tank and i am concerned that the returning gas from pump will maybe shoot into the tank too hard and maybe foam the gas up in the tank. does anyone know of a way i can put some sort of thing in the bung to slow the gas down (or fogging it up a little). the return line will be #8 russell line. maybe some sort of fuel filter?. maybe some sort of valve? any suggestions will be appreciated; thanks Art in NY
Re: fuel return to the tank
Another way to route the bypass is to tee it into the feed line just before the pump and make the system looped. I have used this method on a LS bike that runs a low pressure pump and methanol, once the system is purged there is no aeration,,,good enough for a class record. Others might think otherwise.
We also run on the same bike the oil system relief looped in the same way, on the delivery side we tee in a Hilborn jet can with a 8lb blow off and no pills, then tee into the feed fitting.
Cheers.
We also run on the same bike the oil system relief looped in the same way, on the delivery side we tee in a Hilborn jet can with a 8lb blow off and no pills, then tee into the feed fitting.
Cheers.