Thought I'd share this here.
So far I've seen the MAF sensor having one of only THREE behaviors in OL on Australian cars with stock intake.
If you wish to ignore CL and use the OTS 2.0 Stg2 petrol MAF scale, then maximizing power in the shortest time possible should simply be a matter of plugging in the correct adjusted MAF scale.
(I say shortest time possible, but this is 6 months worth of going in circles).
TYPE 1
The lucky few who have near perfect AFR's on OTS tune.
No correction required except smoothed MAF scale slightly - 1% leaner at 3.2V, 3.9V and 4.0V.
TYPE 2
Starts going rich after 4.0V MAFV or 6400-6800rpm, right before peak power so it hurts your dyno number.
Corrected with "v77.NT1" MAF scale - 1% leaner at 3.2V, 1% leaner at 3.9V, 3% leaner at 4.0V, 5% leaner after 4.2V.
TYPE 3
Farkin rich all over but extremely rich at 3.2V and after 3.8V MAFV.
Usually accompanied by engine load above 1.3g/rev resulting in a fake lean lump around 6000-6800rpm where it's hitting the load limit. It still makes decent power at 6800, purely by accident and sucks everywhere else.
Corrected with "v76.AT1/v77.AT1" MAF scale - 6% leaner at 3.2V, 4% leaner at 3.9V and 4.0V, 5% leaner at 4.3V.
TYPE 1 Examples:
(MT) 1:
http://datazap.me/u/toy-sooby/3rd-ge...2-3&zoom=0-107
(MT) 2:
http://datazap.me/u/deanveljkovic/86...2749&mark=2713
(MT) 3:
http://datazap.me/u/deanveljkovic/ky...zoom=4149-4280
TYPE 2 Examples:
(MT) 4:
http://datazap.me/u/lipton54321/log-...1060&mark=1022
(MT) 5:
http://datazap.me/u/notrq/custom-ww-...0-462&mark=423
TYPE 3 Examples:
(AT) 6:
http://datazap.me/u/praneetn7/stg-2-...zoom=5263-5359
(AT) 7:
http://datazap.me/u/wayne/206-stg2-u...&zoom=893-1084
(MT) 8:
http://datazap.me/u/ethsgreygts/wayn...&zoom=907-1082
(MT) 9:
http://datazap.me/u/supernom/e85-pul...63&mark=68-112