i'm tired of searching.. fpr psi?

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johnnyballs180
Posts: 253
Joined: Wed Sep 24, 2008 6:39 am
Car: 1990 240sx
Location: Nevada

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first, here's what i'm working with:

sr20det redtop,stock injectors,gt28rabout 14psi boost265 lp/h fuel pumpfmiccustom exhaust + manifoldstock mafsoon greddy intake plenum

umm... i think that's about it for now.

the car will go in for tune in a little while, but for now, i need to know the psi (or mpa in my case) for the fuel pressure regulator.

codyace says 43.5 on the gaugehttp://forums.nicoclub.com/zerothread?id=321772

float_6969 says 36 static pressurehttp://forums.nicoclub.com/zerothread/214558

i've looked and looked, so now i'm just going to ask.. what exactly am i trying to do? i just bought a nismo adjustable fpr, we've all seen them, but now i wonder what pressure to set it at. i see 36psi around a lot, but i don't know how stock 370cc injectors fit into that equation, or if that IS the equation.

i'll give anyone who can help me wishful thoughts


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johnnyballs180
Posts: 253
Joined: Wed Sep 24, 2008 6:39 am
Car: 1990 240sx
Location: Nevada

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i kept trying to find something and i couldn't come up with anything more in-depth, so i said fudge it, and went for it.

first, i took out the old fuel pump which wasn't difficult.. aside from unscrewing my sub from it's brackets which i later found i didn't even have to do.SARD 265 lp/h fuel pump. piece of cake. it didn't sit quite the same, being smaller, but like a guy on Zilvia said, just use the fuel hose attached to it to force it into the little rubber thing on the bottom.cool.i ran some new fuel lines which i probably didn't have to, but, why not? if i touch it and it's old, it always breaks.it's like my own Murphy's Law.i put the new NISMO adjustable fuel pressure regulator... also a piece of cake. what DID suck was trying to keep all the fuel from spilling out everywhere. i personally don't care, it's not much to waste, and most of it dries up anyway.. but i was at a shop and didn't want to piss anyone off.

pita, trying to keep house clean.

before installing the fpr, though, i hooked up the fuel pressure gauge (which read in megapascals, not psi like i'm used to.. megapascals [mpa] is metric, i think 1 bar [about 14.5 psi] is 0.1 mpa, or the other way around.. either/or..) to see what it was reading at before hooking up the new fpr, just to see where it sat. i figure, if that's where it is, then cool. i don't want to set it high and f*ck something up.read about 2.2 mpa.so, hooked up new fpr, set it at 2.3-ish, and good to go. i went out this night and tested it out and DAMN! huge difference. my stock fuel pump would cut out at full-throttle, high rpms.at least i think it was the old pump.

total spent:about 250 or something.

time:a few hours. i wanted to make the fuel lines all pretty and without sharp bends, that was the longest.

cool beans.

S133P3R
Posts: 4344
Joined: Wed Aug 13, 2008 4:02 pm
Car: 1989 S13 240sx
Location: South BRO.C. Ca
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any pics of the lines and FPR placement?

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johnnyballs180
Posts: 253
Joined: Wed Sep 24, 2008 6:39 am
Car: 1990 240sx
Location: Nevada

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no, but that's a good idea! i'll do it tonight after work. when i first started working on the car, i took pictures of everything, for record. when i didn't know how the vacuum/pressure lines hooked up, that was a life-saver. now i just say screw it, because that means i have to wipe my hands off, stop what i'm doing, and take pictures.it really is a good habbit to keep though, just for yourself or for showing things to people.i'll take some pics for you later.

aceofspds
Posts: 71
Joined: Sun Oct 26, 2008 11:49 pm
Car: 95' 240sx 00' Maxima

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Set it to what pleases your WB02, if you dont have one yet i highly suggest it. Especially with your current setup.

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johnnyballs180
Posts: 253
Joined: Wed Sep 24, 2008 6:39 am
Car: 1990 240sx
Location: Nevada

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i don't have one! i'm still trying to figure out exactly how it works and what i need. when it comes to the electronics, there's sooo many things out there, i don't know what's what.i'm learning :P

anyway, S133P3R, here's the pics. there's not a lot you can see from them..

in one of the pics, you can see my old fuel hose slit down the middle, wrapping my new fuel hose, being held on by zipties. that's just there to help prevent kinking.

questions, ask away!


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