Okay, so as you may or may not know, I'm currently trying to go stage 2. I have some 440cc injectors and the SplitSec Piggyback (RRM) with software for tuning (using a AEM UEGO and EGT gauge). The 12:1 FMU is still in the system with my Walbro 255 and my bored fuel rail. So needless to say, I'm running pig rich. I've tried to cut enough fuel out at idle to get my AFRs up from being buried at 10 (or lower, thats the lowest the gauge reds) but I'm either rich or the car dies.

Who else is running (successfully) 440cc injectors and what are the details of your fuel system? What are you using to tune?

I have to get this car running good by Thursday night and get it boosting 10 PSI!

I'm considering finding another method of tuning like the SAFCII or eManage.

 

Get rid of the FMU, thats the problem. THe thing is designed to work on stock injectors to throw in more fuel than the injectors could control by themselves. So with the 440s you are puttin gin wayyy to much fuel. Just ditch the FMU, tune with the 440s themselves. Maybe upgrade the FPR to an aftermarket. Should do the trick

 

The problem he is having is with his idle though.. the fmu should only affect the fuel curve after boost. Have you talked with rrm about the problem?