Quote:
Originally Posted by wookwook
this is an edit: i was running out the door when I posted, but what I 'think' you are getting to is fuel enrichment. yes there is enrichment in the the fuel ratio as rpms and power demands dictate and the modern vernacular is lambda and ours goes to around .82 at WOT. this (Short Term Fuel Trim) is fine tuned via MAF calibration (in steady state and WOT). The accurate fuel recipe needs to be entered (as stoich value) in the fuel table so the ecu knows what to expect (there are sub algorithms that use this data). the default is 13.9-ish for 93 octane E10 in the E80A. If you have a wonky MAF calibration or an external effect on the MAF sensor (CAI is a common one) it can result in a skew in the AFR line like in the RC blue line, the Stoich does Not change.
W.
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Wook, were you running a CAI in that RC dyno? I may end up waiting. The RC just sounds so darn easy.