nismo fpr/base fuel pressure

[fenderguitarist]

i just installed a nismo fpr type on my red top im trying to figure out what the base fuel pressure is for the redtop. i know its a rising type fpr does that mean if its 42lbs and im running 1 bar of boost id set it for 27psi and would it use the boost to push it higher? i have it set for 42psi now my wideband says at idle im in the high 12's wot still bounces from high 10's to low 11's

[DrifterProdigy85]

Set to 43psi w/o vacuum. Make sure the engine is warmed up and you drive the car before setting the fuel pressure. Fuel pressure runs high before the engine is warmed up and driven.

[fenderguitarist]

Set to 43psi w/o vacuum. Make sure the engine is warmed up and you drive the car before setting the fuel pressure. Fuel pressure runs high before the engine is warmed up and driven.

i just tried that out im now running upper 12's at idle wot is low 11's i think i may have a vacuum leak my avcr says im running 53-54 in/hg at idle im not sure how much vacuum im suppose to have but is that low?

[DrifterProdigy85]

Try doing a boost leak test. My car runs around a 11.3-11.5 AFR. I run alot higher boost though. On a stock setup i would aim around 11.6-11.8. Check for boost leaks, if there are none then lower the fuel pressure some till you get the AFR you want.