08-27-2013, 09:34 PM #1
Question, when adjusting afrs is there a point where fuel pressure is to low? I'm at 11.3/11.6 @42lbs should I lower fuel pressure more, or try smaller injectors? Et137 48lbs injectors 8100rpms thanks
08-27-2013, 10:16 PM #2
at 42psi your near the low limit for the injectors to work correctly
your not that far off where I would run on pump gas
you could try 40psi but they may/probably will act up
the real fix would be a real fuel controller or re-flash like v-tech
08-28-2013, 04:50 AM #3
Setup a begi like I used with that charger... How's it running?
08-28-2013, 06:06 AM #4
Fuel pressure in the rail should be at least 45-55 psi greater than the pressure in the intake at all times.
AFRs should always be tuned with an ECU tuning device based on what you see on a data log.
08-28-2013, 07:34 AM #5
- Join Date
- Dec 2006
- Crest Hill, IL
T, what was your base fuel pressure when you had the 42's in...wasn't it in the upper 60's?
Its been warm the past few weeks, I bet it will lean out a little when the air cools off and the water gets colder...That should bring you raise the AFR a little...
08-28-2013, 07:40 AM #6
45-50 psi then either CMD it or adjust it via flash.
08-28-2013, 08:12 AM #7
- Join Date
- Aug 2011
I wouldn't count on the tunes being spot on. Had two now and both are off
08-28-2013, 11:15 AM #8
Ya danny, it was up in the 60s, this is a cheap regulator and gauge!!!! Gauge probally not reading correct either! Greenbullet finally got it to some calm water. HOLLY SH.., you grab the gas and it rpms NOW!! MACHINE IS WAY QUICKER, not much mph increase. I was hopping for more mph than aceleration.
08-28-2013, 03:15 PM #9
08-28-2013, 04:29 PM #10
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