Originally Posted by
ALB
I have been running my car open loop no ltrims or strims for past few weeks. My idle afr is around 13.5 haven't even bothered to lean it out. My base pressure is at 58psi line off.
I have boost referenced reg.
Idle is good and no surging at idle or off ,no bogging.I realize might be losing some mileage but didn't built a 1000 plus hp car to worry about a mpg or two.
I may try to lean it out and then turn on closed loop again but really can't see why would bother. My car seems to like openloop full time.
The basic theory is quite simple. The 80s have trouble running stoic at idle at 58psi.
You could lower base pressure way the heck down to maybe 30psi and maybe they would idle better but that defeats the purpose of running the 80s.I need the base to be 58psi or even higher for my power levels.
So this open loop workaround can be a permanent fix as far as I am concerned ,unless decide to run my 120 low impedence injectors . Just hate the extra harness ,the add on box isn't too bad.