of course there is a reason... its a PITA
What is the reason for going to an electric fuel pump? The requirements for your engine are well within the abilities of a mechanical fuel pump, unless fuel injection is in your near future? Mechanical pumps are reliable, cheaper, quieter and easier to plumb. If you do decide to go electric, you may want to research how loud the pump is before buying. Some of these things sound like small air compressors when they are running. My 2 cents ;-)
Alright, Alright, Alright, ya'll have com very close to talking me into it. I think i am just going to go with a mechanical. But one more question, where does the filter go?
As far as the switch for the electric pump goes, couldn't it just start up when i turn the key to accessory?
And im not racing, there was some guy in here talking about an emergency shutoff switch and all other kinds of doo-dads, is that necessary for the street?
With a mech pump, the filter goes between the pump and carb. But I also like to run a filter before the pump too, unless it causes problems (some pumps do OK with em, some don't) Can't have enough filters, dirt is the #1 cause of carb problems. With an electric, the pump needs to turn on with the ignition. An Emergency kill is a must, not just for racing. They're just as needed on the street, if not more than racing. When you get into a wreck and you're incapacitated, strapped or trapped in the car, you really want an electric pump still supplying fuel ?Nothing that's been suggested here in an electric pump system could or should be called a "Doo-Dad" Even with a low pressure pump, you still need a regulator, run it without one and you'll likely have problems. With a carb, the fuel pressure is only there to push down the float in the fuel bowl to lift the needle off the seat,and let fuel flow into the bowl(s) it takes very little pressure to accomplish this function. Too much pressure and you flood the carb, eventually dumping fuel either into the carb throats (marine carbs are designed to do this) or all over the top of the engine.
How do the mechanical units shut off in-case of an accident?
Basic formula for determing GPH for fuel pump = BSFC (brake specific fuel consumption) 0.4 (N/A carb) X 300 HP (HP @ flywheel) = 120 lbs/hr
0.4 / 6.2 (one lbs of gas) = 19 gal/hr
Mechanical is sooo much easier and safer. Use the inexpensive street/strip Carter pump, and you can upgrade it to support over 700 HP should you ever desire. They're rebuildable, so it will last for the life of the car.
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