if i were to install an aftermarket fuel pump, say a walbro 255lph fuel pump on a N/A engine with mild mods, would it make any difference or just waste more gas?

 

You'd gain nothing.

 

when i called walbro to see if the 255lph would fit my 95 he said he is not sure, but if it does make sure you have larger fuel injectors. so make sure you know what your installing and everything else dealing with it that you have to upgrade. and 255lph upgraded fuel pump feeds more fuel to the injectors for boosted applications is that the route your taking?if not don't waste your money .

 

you don't have to have larger injectors just because you get a larger fuel pump.

back to the subject - dont waste your money.

 

i wasnt going to buy a new fuel pump, i just wanted to see if there any gains at all.

BTW, my friend has a 91 eclipse gsx, he just baught the Walbro 255lph Fuel Pump, and DAMN, that thing pulls like crazy now, it benefited him because he is turbo.

 

no gains. what fuel doesn't get injected gets recyc'd back to the tank. ECU controls how much fuel in injected by controlling the "pulse" width it sends the the injectors.

 

"I bought a pine scent air freshener and my car hauls a$$"
One may not necessarily do with the other. Your friend's car hauls because he has a TURBO on the car (as mine has a SC)... the FP just "supports" the "rest".

 

the only think with the walbro is that it might be less expensive than oem. it does boost base fuel pressure to 40psi (stock is 34) so there is more richness in your tune. our engines seem to work well with a slighty lean setting.
Steve

 

If you guys would visit the GD forum once and a while you would know there is one.
http://forums.maxima.org/showthread.php?t=381827
But no, it won't do anything for an N/A car. Actually it will probably hurt performance because the base FP is raised therefore making it rich throughout the revband.

 

you can get the 190 lph pump.

 

True but there isn't much point in that.

 

except that its cheaper than the oem

 

The only reason to get a Walbro is if:
A) You are going turbo, SC, or n2o and then a 255lhp-hp would not be a bad Idea but an adjustable FPR wouldn't either to control the idle fuel pressure.
b) Your stock one broke (doesn't happen that often) and since OEM is more expensive, get the 190lph and call it a day if A is not in your future.

 

An ECU upgrade (superchip.com I believe) would be more beneficial than the fuel pump, unless like some has said you are going for a boosted set-up.

 

even the 190 is too much for NA.. id stay with stock.. hell ive seen the stock one handle a 75 shot of nitrous.. soo..

 

If I install the pump before I toss on the blower will the SFMU be able to adjust only the base FP?

 

yup, thats similar to the way that i'm running now.

 

i have walbro 255lph in my car. it fits perfectly, but there is no hp gain.
i bought it because im planning put SC to my car