wot tuning with sharktuner

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02-12-2009, 01:14 PM

#16

worf928

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Quote:

Originally Posted by Bill Ball

I misunderstood that the selection to disable O2 adaptation was temporary during Autotuning.

There are TWO 02 adjustments. The 'normal' hunting 02 adjustment that is disabled with auto-tune. And the 'learned' 02 adaptation that accumulates over time - think of it as a cumulative average (it isn't though) of the first value so as to allow the 'normal' loop to adjust faster.

You can turn it off or clear it on the first fuel map tab (IIRC) and once it's off it's off.

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02-12-2009, 01:44 PM

#17

John Speake

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Quote:

Originally Posted by Bill Ball

I misunderstood that the selection to disable O2 adaptation was temporary during Autotuning. I didn't know that would go into the code. I only find this described briefly in the PEM manual, of which I have draft 9.

HI Bill
There's a somewhat more recent version of the PEM manual available from my website now
http://www.jdsporsche.com/faqs/PEM%2...0Issue%201.pdf

Although it doesn't add any more info on adaptation. (long term version)

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02-12-2009, 06:40 PM

#18

Louie928

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Quote:

Originally Posted by John Speake

You need the WOT switch working on the LH for the ST to tune high load cells to the "WOT ttarget A/F ratio" in Autotune. These will usually be a fatter A/F ratio than the rest of the map, which for most cars is set for 14.7:1 for the O2 loop.

AFAIK Louie has only ever disconnected the WOT switch feed to the EZK.

Yes, that's correct. I leave the WOT switch connected to the LH, but put zeros in the WOT enrichment map. The base map has enough range to get enough fuel. I disconnect the WOT switch wire at the EZ-K plug and tune the timing on the EZ-K base map. Both of these are tuned at different loads from about half throttle on up to full throttle.

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