Carter Universal Electric Fuel Pump Automotive Replacement 12V (P4070)

Better longer lasting that the cheaper ones.

Works good for auxiliary fuel tank pump

This pump is an easy bolt on and did not need a regulator. It stays at a good 4 psi under throttle and I have a blower on a Chevy small block 350. Try to hang it at tank level or lower.

I had a Holley pump on my hotrod pickup truck makes 350ish HP and it siezed up from sitting for couple years but I always hated that pump because it was soooooo loud, as soon as I turn on the key I'd have to listen to that horribly loud growl they make until I shut it off, when I was replacing if I thought I'll try this one it says it's quiet and it's not one of those tiny cheap $12 pumps and wow huge difference you can barely hear it outside and not at all inside. The only issue I had was those damn electrical connectors that just pop on because they pop off just as easy. That issue has left me dead in the middle of an intersection and on side of a busy road, it only took a second to jump out pop em back on but jumping out an crawling under my truck to pop the wire back on in the middle of a busy intersection or cars whizzing by is less than ideal, so it has electrical tape wrapped around it holding the wires on, it was temporary but it worked so I never bothered to do a permanent fix on but other than that it's a great reliable very quiet pump.

Update 24 sept 13: I finally got around to using the pump to transfer fuel from barrels to an aircraft. The 1.2 gpm flow rate is a bit leisurely for a 50 gallon transfer, but better control than the 30 gpm mess I experienced with pumps designed for truck-mounted tanks that have real gas-station hoses and nozzle.The pump came with two brass 3/8" hose barbs that thread into the pump.The electrical connectors are just un-threaded studs, so you must use their proprietary push-on connectors, which are included with a retaining clip. Lose any of it and you are dead in the water.TomFrom various places on the web and the installation manual I found that the Carter P4070 pump specs are:Free Flow Rate: 72 gphMaximum Pressure (psi): 6 psiInlet Size: 1/4 in. NPTInlet Quantity: OneInlet Attachment: Female threadsOutlet Size: 1/4 in. NPTOutlet Quantity: OneOutlet Attachment: Female threadsThere is an inlet screen built into the pump to keep out rocks and birds, butAn inlet filter is mandatory to prevent damage and for warranty. Apparently the pump and motor flood with fuel for cooling, which makes it sensitive to contamination from water, rust and crud.The pump in the box weights exactly 3 lb.These universal rotary vane electric fuel pumps from Carter operate with leaded and unleaded gasoline, gasohol, and fuel boosters. (There is no mention of diesel, but Diesel blog members report great success using the P4070 as a lift pump from the tank to the high pressure fuel pump).They have an internal pressure-regulating valve, and feature free-flow fuel delivery. These pumps have no points to burn out, and no shaft seals to leak or deteriorate. Easy to install, these universal fuel pumps come with a complete installation package and instructions.Place pump at or near bottom of tank, and never more than 24" above the tankAn inlet filter is mandatory to prevent pump damage.An A-68301 pressure safety switch is recommended. Or an oil pressure cutoff switch to shut off the pump when the engine stops.Use a 404-500HP adjustable pressure regulator if reduced pressure is requiredThe pump is noisy. Use rubber hose to connect to vehicle lines. A 'quiet pack' is also available to muffle the noiseUse 3/8" hoseUse 14 gauge wire and 10 amp fuse

These pumps are ridiculously bad. In case you think I am maligning a decent parts manufacturer because I slapped a pump into an old clapped out junker with crappy wiring or bad grounds or couldn't figure out the oddball electrical connectors, no, that's not the case--I did everything right, installed it below the tank far from the engine bay, used oversized wire, triple checked everything, making sure the grounds were excellent and the voltage at the pump was within spec and the ground was at 0.0 ohms, and still this pump lasted about an hour. I drove around the neighborhood, was pleased with the pressure (~4.5 PSI), but the next day started the car up and noticed the pump was a bit noisier than it had been the day before, and I could hear it clearly above the idling engine. Now the pressure was 6 PSI, and after about ten minutes it dropped off to less than 1PSI then down to zero and the car died at idle a minute later. I let everything cool off, checked and double checked everything, and restarted it. The same thing happened. I even measured the temperature of the pump, to make sure it wasn't heating up. I repeated this process a few times, then removed it, put in another brand new identical pump I'd bought for a backup, and the second pump was even worse, making about 1 PSI. The car would starve for fuel at anything over idle. The second pump was quieter than the first, but still sounded "off," not at all healthy. I can't be sure, but I suspect Carter pulled the old trick of moving manufacturing overseas to a factory with inadequate quality control, and are simply getting people to buy these pumps based on familiarity and brand recognition because they are technically OEM for several models. I would be surprised if Carter are in business in five years if they keep building parts like this. I would use anything rather than one of these pumps again, Holley, Mr. Gasket, Facet, or even some no-name knockoff. This is the worst pump I have ever seen, worse than garbage because it almost sort of wants to work, and if you didn't have a pressure gauge you'd be left scratching your head. FYI, I installed a Facet pump and everything works fine.

Running my nitrous enrichment