Originally posted by Terry Haines:
Max power is around an A/F ratio of 12.5:1...not stoch...what are you running?
Richer than that at WOT, I suspect. But my pinging comes on just as the car goes into open loop enrichment (acceleration ~ 25% throttle or so). O2 sensors read in the .89 range - probably in the ballpark of 13:1 or so. Trying to get the AFC tuned for bigger injectors is a little tricky for less than WOT conditions. Give it too little negative correction and I throw rich codes and foul plugs at tip in. Too much negative correction and I get leaner than I'd like at tip in.
It's not the best tool, but it's what I have to work with for now.
