fuel pressure recommedation

[ray666]

my swap is almost done but what should the fuel pressure be at? i hope that isn't a broad question.oh i don't know if this matters but i'm running a s15 turbo z32 maf and z32 fuel filter and 750cc top feed

[ray666]

anyone help a brotha out?

[liquid_cool]

ok man....since your runnin larger injectors you have to be carefull about finding the set fuel pressure for them..otherwise they dont function properly....what ya do..is look at the enjector at the top where the clip goes on..there is a bunch of numbers from the manufactuerer...write those down and use your browsers search function..you should find the listing for the injector and the psi or bar with flow rating...enjoy.

[ray666]

my car is at the mechanics right now. i swap the motor out of another 240 so i haven't tinkered with the fuel so hopefully the last guy had it running right the first time

[ray666]

ok heres the update. I had to change my set up to stock maf (cuz the n62 might be bad) and 550cc inj. but i'm still using 750cc. do i still tune the fuel pressure for 750cc and tune with my neo for 550cc?

[the converted]

Fuel pressure should be 43 psi without vac to the regulator. There is no difference when using different injectors.

[ray666]

phuc yeah! that has been bugging. thx dude

[liquid_cool]

Fuel pressure should be 43 psi without vac to the regulator. There is no difference when using different injectors.

you shure bro?..couse mine recomend 45psi for 350cc flow..and i have seen injectors that run up to 90 psi recomended pressure..so now im confused a bit...this is an area im not to familar with to be honest..can ya broaden this a little for us.

[ray666]

hey liquid i found this flow chart

http://www.justfuelinjectors.c.../Page

[ray666]

well got errthing running but i think the ecu is bad cuz its running rich and none of the tuning is working

[the converted]

Are you running a stock ecu, 750's and an afc?

[DemonicSpeedz]

i have always started at 45 and worked from there but it shouldnt be to far off that position

[johnnywild]

i hope u tunned that ecu or put some manager on it before putting those injectors on if not u gonna blow ur s***

[ray666]

i'm just gonna foul plugs until i get another ecu.i'm running a calum ecu. the more i mess with the afc the more i think you can't tune it. everything i do has no effect on the injectors. i think the ecu is not sending signals to the injectors to lean out.

[ray666]

i really need a stock ecu. to test and make sure the ecu is the problem. i have a guy about 2hrs away from me who's gonna see about giving me one.

[the converted]

Did you install it or did Calum? Double check that the jumper is jumped. You are also going to have to make HUGE fuel reductions to get the car to run right.

[ray666]

i went as far as dropping pressure down to 20psi and on the afc -50 all the way across the board

[the converted]

You have a Calumsult, WTF are you doing messing with an AFC? Have you changed the in and outs for the maf adjustment to what it is now? Even such, youshould toss the afc out and start doing adjustments in the ecu.

[ray666]

i don't have a consult cable hence the safc. right now i have the stock maf 1 in 1 out

[the converted]

And what is the Clumsult tuned for? I think that you have two components fighting each other, especially if the calumsult is looking for a z32 maf and 550's instead of a ka maf and 750's

[ray666]

i'm going to get a 62 ecu and tune tomorrow. wish me luck