I have a mircotech in a 3rd gen with 850 pri and 1600 sec. i cant seem to get the air fuel ratio higher than 11.5 without missing. i was just wondering what other people were getting on their widebands. i was also wondering what the timming at idle is, mines at 13 deg. the car rev up pretty smooth but just wanting to get the idle leaner.

 

its been a while but i think i had 18-20 degrees timing @ idle on my old FD

 

Is is very difficult to get a car to idle leaner with huge injectors like 850cc for primaries, you can try lower the fuel pressure a pound or two.



I have noticed that tuning an engine with very large injectors is very diffult if you are running low boost. The ms is just too low to control the injector efficiently. How much boost are you running?