fuel system question

[Blown353]

I'd just like to throw out SX fuel pumps as an alternative to Aeromotive.

I have just over 10,000 miles on my SX fuel pump now and it has never given me a single problem. No hot vapor locking, no magnets coming unglued from the housing, nothing. My SX pump is being run full voltage at all times and for the last 5000 miles it has been run with a Kenne Bell volt booster which feeds the thing 17 volts once the engine sees 3 psi of boost-- and I'm into the boost quite a bit. Noise level is about the same as an A1000, and if you mount it on rubber isolators you can barely hear it in the car when the engine is off, and you can't hear it at all with the engine running.

The preferred method of running a high-volume electric pump is as Jody said; size the fuel pump to give you some headroom at your horsepower level (I'd prefer 20% more fuel pump flow than your engine will consume; at 525hp and say .50 bsfc which is a reasonable number for naturally aspirated, you'll need 263 pounds of fuel per hour net, with 20% headroom that's 316 pph) and then run a controller/voltage reducer to slow the fuel pump down under cruise. This decreases the volume of fuel circulated in the system during cruise, which helps prevent heating up the fuel (which will cause vapor lock) and also saves wear and tear on the pump.

Also had very good luck with SX regulators.

Troy