Creator

iTrader: (1)

Engine is a LS/Vtec with JDM type R cams. The car was tunned with 750cc injectors. I just put in a walbro fuel pump. (part by part getting ready for a turbo)
I'm now getting too much fuel so I picked up a fuel pressure regulator. I was wondering if you guys knew around what fuel pressure I should be running? Maybe some numbers on what a stock GSR or type R run would help give me something to start at.

K20egcw

45-50

Paul-R

with a LS/V anywhere between 50-60 point is best im @ 50 exactly in my ls/v

Creator

iTrader: (1)

Well 45-60 seems like a big range. I just read about an s2000 that was running 53. I think I'll start with 50 and watch my plugs. Where's the best place to check what I'm running? End of the fuel rail?

K20egcw

Damn 60 is kinda high lol, Id do 55 max. Honda's fuel pressure on a b18b1 is 40-47, B18C1 is 48-55, and B18c5 is 47-54 according to the Helms Service Manual

DraginTeg93

i have a lsvtec . and i dont think its giving me its all .. im only getting like 35 to 40

DraginTeg93

.....

Creator

iTrader: (1)

If your only getting 35-40 psi it sounds like you got some problems. I actually had a friend with a factory manual and it had just slipped my mind. The book says:
B18B 40-47 psi
B18C1/C5 47-54 psi
with fuel press vacume hose disconnected and pinched

B18B 43 psi
B18C1/C5 50 psi
with pressure regulator connected

onebadd4dr

anyone know a good psi setting for an ls/v on stock injectors with a walbro 190FP? 45psi seems to be a little to rich for me....at that setting my wideband at idle reads about 12.4

jdragon1974

im running an ls/vtec with b16 head..with it at idle im at 32 on stock injectors and walbro 255 and it runs perfect. when you take the vaccum off it should be 50.

onebadd4dr

i was at stock before and my **** ran lean as hell...at idle around 15.5 and WOT sometime 17.4....sometimes it wouldnt even read it would go to 18 then go blank(3 blank lines) lol

jdragon1974

yeah i need to get me a wide band.. bout to go up to some skunk2 pro1 with itr springs and retainers.. adjustable aem cams..im excited.. but im on s300 so my fuel is dailed in a bit tighter right now..so 32 when at idle and im running stock fuel rail and aem fpr..also make sure your idle screw on your tb is good, had a friend that had the idle screw turned all the way to the right and he ran lean unitll we opened it up a bit...just a thought

onebadd4dr

alright thanks i will check into that

jdragon1974

no problem...so how is the power on your set up.. what all are you running.

Borgi

I have a ls vtec turbo and I have fic1000cc injectors and just put a 255 walbro im trying to figure out what my fuel press should be

wunfstgsr

The stock FPR is good for over 600 hp. Im only at 350 still using stock FPR.