Quote:
Originally Posted by DarkSunrise
I was using 93 octane pump (Shell) for those pulls and the logs were taken in MD. The car's outside temp gauge was reading between 89 to 93 F. There was about 50% humidity locally.
Thanks I'll try those adjustments and yep stock airbox. The data from your pull is pretty interesting. What is your setup and tune? I noticed you're running a fair amount more ignition timing through the midrange, then it tapers off pretty quickly above 6000 RPM. That was similar to how my OFT v. 2.074 tune looked, except your commanded AFR is leaner than I remember.
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Reason I asked about your intake is because if you were running a aftermarket intake the MAF v would be vastly different.
My current calibration is quite a bit different from any OTS tune, though I began with a OTS EL stage 2 from Vishnu. The ignition advance reflects what can be safely ran free of knock correction at slightly above normal operating temps given the cam timings and fuel quality (91CA summer blend*). With the help of Kodename47 with the cam tables and other adjustments effecting OL fuel trim I came up with this "z6" tune. (named for identification purposes).
The reason why it tapers off past the upper end is because with my current setup, EL headers, stock catback/airbox on 91 octane, it would have knock correction making the resulting ignition advance even lower than if I had not reduced the ignition advance. Since the exhaust and cam timing is so different to yours you shouldn't compare ignition advance with mine. The OL fueling table is also quite a bit different (leaner).