CAR - AE86(Aus spec)
MOTOR - 20V Silvertop (Razorback ECU with hand controller)
USE - Street/daily
PROBLEM/QUESTION - Has anyone got experience with tuning Razorback ECU's without needing a dyno done? it is running rich.
OCCURS/STARTED WHEN - I got it tuned with a vacuum leak from the Idle Speed Control Valve.

Hi guys, I got my 20V silvertop tuned while it still had a vacuum leak from the ISCV and I don't want to really pay the $400-$600 for a retune so they can lower my idle rate and everything else. Would there be a way to use the hand control unit to do this from home without completely messing it up or should it just be left to a tuning place. It

I will be running off the Idle Bypass screws on my quad throttles and was wondering if changing the (x.xxms) idle fuel ratio would be enough with the new idle settings or will it just cause it to lean out or run rich again?