gregbar said:Whats with the sudden drop in AFR at 3500RPM? Do you want it down at 13:1?
12.8-13.2 is perfect AFR at WOT in a naturally aspirated car. when you go wide open throttle the AFR richens, this is called power enrichment. it happened at 3500rpm on that graph because thats when they suddenly hit the throttle to start the dyno run.