okay. so I'm running a 50 with a stock fuel system on a 2000 max. It looks like 75 is already sort of pushing it on the stock set up, so I'm wondering if I got a Walbro 190lph would that be enough to take it all the way up to 100shot. I would also go down one step on the plugs.

This is what I don't understand. If I get an aftermarket fuel pump and I need to control it somehow, lets say to a correct afr, does that afr stay when I hit the spray or do I need to have two seperate settings to achieve that? Thanks guys, I know that it's a nwbish question..

 

nevermind I just read a thread about it... I should have looked... sorry...

 

Walbro High-Pressure 255 ltr/hr Fuel Pump! 190=To Low for 100 shot, but you probably already know that. Good luck w/ the 100 shot!

 

190 high flow is more then enough for 100 shot. and 255 is only needed on a dry setup.

 

190 is plenty.......

 

kool, thanx a lot everyone. Injectors are not needed on a wet set up, right? Since you only need enough to sustain wot fuel requirements for the injectors, and additional fuel that mixes with nitrous right before the intake. Am I right about this? Eaither way I'm glad that its enough

 

Where can i Buy a Walbro 190lph Fuel Pump, Well i looked but it doesnt fit my application for the 5th gen, anybody know the part #..

 

only for dry setup or can it still be used w/ wet setup?

 

can be used on wet, but you will have to get a fpr.

 

hmm, i read that you may not need an fpr with the 190, which is why I would go for the 190 and not the 255

 

with a 190 lph I'm running about 43 psi @ idle and 50ish @ wot. I do have a AFPR that I have yet to install.

 

you don't need a fpr w/ 190 fuel pump then?

 

Is this True???

 

its really your own preference. You will run richer without an FPR which some may say could hurt your NA or even nitrous performance however you will be running safer(better to run rich than lean). I got one just because my mpg has been kinda crappy since the new fuel pump (300-310ish compare to 370ish before) that and NX did there bench test their jets @ our stock FP so I feel it'll be better to at least get closer to that FP even with a 190 fuel pump , but its really up to you if you want to get one or not.

 

with the 190 pump the idle fp only goes up by maybe 1-3 psi.

 

how about make this a sticky in the n2o section? pretty good info in here...

 

I'd say these sort of fuel pressures warrant having an adj. FPR.