STI injectors @ 4 bar fuel pressure. Anyone have any knowledge??

[RalliartRsX]

Hello Class

I have random question for you.Does anyone have any experience with running STI injectors @ 4 bar fuel pressure?? Specifically; has anyone heard of any issues of running STI yellow top injectors @ 4 bar fuel pressure (especially after back to back highway pulls for a baseline)??

I have a set of 800cc recapped yellow top STI injectors, and apart from having to jack up the fuel table numbers in the idle columns (seems most big boy sidefeeds have a hard time idling at low pulsewidths, which is fine), there is an odd issue where after several pulls (dyno/highway), for whatever odd reason the A/F ratio would skyrocket while idling, similar to having the injectors not firing. In boost, everything else is normal.

Also to note: 4 bar fuel pressure equates to about ~940cc of flow per injector.

Thanks!
Setup:
SR20DET Blacktop (180SX, 98 MY)
BW EFR 6258
2.5" induction piping
Stock IM
3 inch exhaust
20+psi
NISMOTRONIC

P.S Please do not ask why I am cranking up to 4 bar fuel pressure, I am curious if anyone has had any experience and I am gaining a baseline before I switch over to E85.

Thanks!

[KAT-PWR]

4 bar on redrills?
Sounds like a bad time.
NASIOC is where you should be looking for this info, I recall a few threads of people running yellow tops at 4 bar

[RalliartRsX]

4 bar on redrills?
Sounds like a bad time.
NASIOC is where you should be looking for this info, I recall a few threads of people running yellow tops at 4 bar

They are not redrilled.

They remove the diffuser cap. You do lose spray pattern however (in addition to several other side effects).

Anyways.......

I may have found my answer elsewhere :2f2f: