OL AF

552 Views 8 Replies 2 Participants Last post by AlmightyFork, 2 mo ago

AlmightyFork

Discussion Starter · 2 mo ago

Hello everyone. I've always used OL AF to determine WOT. It has normally always been one of two values -

Cruise - 14.37
WOT - 11.77

Well, I noticed I was pretty lean 4k-5k rpms (12.6), so I added 7% fuel to this RPM range. After pulling a datalog, I'm now seeing a new OL AF. Any idea what caused this? I'm now even more lean! Though I'm not really seeing any knock.

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tbagg1ns

· #2 · 2 mo ago

I always thought OL AF was just the commanded value, not actual AFR

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AlmightyFork

Discussion Starter · #3 · 2 mo ago

That's correct. I added fuel on the DST (+8%) and this change happened. You'll notice my crazy dangerous wideband output beneath that (new and abnormal).

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tbagg1ns

· #4 · 2 mo ago

Ohhh yeah I see the graph value now is 12.57 not 11.77

Any chance you adjusted the fuel the wrong way with the diablo? I know I did on my intune i2 way back when I first fucked with it. The + side said lean and the - said rich, so the displayed value would read -5% when you were actually adding fuel

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AlmightyFork

Discussion Starter · #5 · 2 mo ago

I believe I did, but I wanted to confirm. Diablosport tech support says positive adds fuel on the Trinity 2, but my observations are different.

I added 1% in one range and -1% in another to verify. Will log later. DST issues are almost making me wish I stuck with my old DSP.

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tbagg1ns

· #6 · 2 mo ago

Yeah Im pretty sure that's correct with the trinity, + is add fuel. At least thats how it was when I was upping boost on the stock tune last year with my t1000.

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AlmightyFork

Discussion Starter · #7 · 2 mo ago

tbagg1ns said:
Yeah Im pretty sure that's correct with the trinity, + is add fuel. At least thats how it was when I was upping boost on the stock tune last year with my t1000.

0% had desired fa at 11.77.
+8% had desired fa at 12.6.

Feels backwards. Maybe I have another issue.

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