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Showing results for tags 'fuel lines'.
I'm experiencing a slight rich issue and need the groups help. Its an l28et running a JWT 550 kit in a 71 240z. Using the stock l28et fuel rail, Aeromotive FPR with psi gauge, upgraded to bigger fuel line (still using the oem return line), and an unknown in tank pump. Prior owner says its a 300zx turbo pump, but I have yet to drop the tank. I have seen it go to 65 psi with no pressure drop at all. 11.5 AFR until boost crosses the 10 psi mark, then fuel pressure shoots up 5 psi too much (relative to boost )and stays that way. At idle, fuel psi is correct. Cruising, it's correct. The problem shows up only after 10 psi of boost, thats when my AFR's go to 9.5-10.5. Myself and other can't see any smoke from the tail pipe during acceleration. I believe there is an restriction thats not allowing the fuel to return fast enough. Maybe the oem fuel rail? I don't see any pinches in the rail that would cause such a thing. Maybe its my setup. Any ideas where the restriction might be?
I am researching the requirements for a fuel system setup that can handle 600whp. I'm looking for a quiet system preferably an in tank setup. Bolt in in better as I would rather spend my time driving than wrenching once its completed. Car will be set up with the stock Aristo 2JZ GTE VVI @ 14 psi initially until a single setup and aftermarket engine control can be purchased and installed. My 4V modular power fox body uses twin in-tank Aeromotive 340 LPH pumps, single #8 feed and a # 6 return to Aeromotive fuel rails, Aeromotive Boost sensitive regulator, and 42 lb injectors. Car makes 525 hp, 505 tq, idles smoothly, drives like stock (until a heavy foot) gets 24 mpg and is very easy to driver; a true street car. You cannot hear the fuel pumps running. Put your foot into it and punished the tires. The car is fun and so much fun to drive, dead reliable and I would like to replicate that in my 71 240 2JZ vvti swap.