Fuel Pump Rewire?

:sunglasse Well, since everyone talks about rewiring their fuel pumps I guess I should follow suit. One thing is though, my car I guess has the 255 pump... But I don't know how to prove that, the whole back is tore up, like the carpet and the wood floor dealy thing.

I can't tell if anything is new, or been replaced, it looks like my fuel tank was taken off, but I can't tell, I have a 1G and I was wondering if there is a step by step process for rewiring the real/non-existant 255 on the 1g? I searched but found only bits and pieces. Thanks guys

Thanks your my hero, But how do I determine the type of fuel pump?
?

Pull it out and check the part # weinus. Walbro makes replacement parts so don't think just because it's a walbro that it's a 255 or even 190...

Does rewiring really improve anything that much or is it just a good thing to do...

Does rewiring really improve anything that much or is it just a good thing to do...
Yeah it does make a big difference, it's not that hard and it's cheap (I actually have most of the parts) it provides a more consistent power source to the fuel pump, like the up, down noise when the turn signal is on.

cool, and good heads up on that 100 buck exhaust

To give a relatively recent personal experience, I rewired the stock pump in the EVO. With stock wiring and the voltage associated with it, it was mathematically good to ~35 lbs/min. At 34 lbs/min I would start to see the WBO2 pull away from the calculated AFR. So that was right on. According to the calculations it would be good for something like 44 lbs/min rewired. Sure enough, I have been as high as 43 lbs/min with WBO2 tracking calulated nicely.

Before the end of the season however I went to a 255, just because they are so cheap, and it's not as big of a strain on the stock EVO FPR since the stock EVO pump is roughly a 190. With large pumps I like the rewire not so much for the extra flow (but this is still a concern when you max out a 255 as I was and many others are these days) but for the extra current capacity. The 255s and Supra pumps etc can draw over 20 amps, not something I'm comfortable with on the weak stock wiring (18ga?). ;)