HELP - AFR on Durametric Testing

[Group.america]

I have been running a few simple idle and gentle driving tests using a Durametric system and REALLY NEED HELP


Car = 2005 Porsche Turbo S, 6MT

Mods = AWE GT2 race exhaust, high flow cats
GIAC tune - assumed to be for 93 octane
EVOMS - vflow intake system

I am either the dumbest mother effer on earth or this car is running richer than a Dallas Oil Billionaire.

I am assuming 10% ethanol content in my 93+ octane gas and therefore using a 14.7 * 0.9 multiplication factor on the Oxygen sensing Lamda value to get my AFR's

My problem is even on an idle data-log the O2 banks seems to have very high Lambda values at 0.99-1.01 implying I am running an

AFR > 14 and the lowest near 13 and when driving it was showing values over 60 (wtf ??)


Am I doing something wrong or is this for real ?

[Group.america]

This shows some WOT test results.

[BoostAddict]

I believe lambda for E10=14.1. I'm willing to bet your super high afr is only when letting off the throttle.

[Group.america]

I believe lambda for E10=14.1. I'm willing to bet your super high afr is only when letting off the throttle.

Is that normal but yes it is very high when I come off WOT

... I am dumb when it comes to this.....

[BoostAddict]

Yes, perfectly normal

[Group.america]

Thanks