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LOGS. APR Stage 3. 91 octane. Leak at compressor inlet. Bit lean?

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Old 12-11-2008, 12:33 PM
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Default That thought did cross my mind for a millisecond.

Thanks. I do like the tune since. As you said, it's conservative, but solid.
Old 12-11-2008, 12:45 PM
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Default good point. He should be able to get more timing up top, and he is a little lean for 91

at least based on the narrowband.
Old 12-11-2008, 12:50 PM
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Where should I be on the narrowband?
Old 12-11-2008, 02:35 PM
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Default my narrowband O2s are generally in the .87-.89 range

for a ~10.8-11.0 AFR
Old 12-11-2008, 02:40 PM
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I'd be more focused on getting more timing at peak torque, which is precisely where it's lean IMO...
Old 12-11-2008, 02:42 PM
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that's what I meant. I'm all over the place today. you are right.
Old 12-12-2008, 09:08 AM
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Default Just take your time and have piece of mind, car looks good.

My friend Keith (SilverToy) Has APR Stage 3 on his car....he started at 4.5's and by adding things here and there he's running just a tad faster than you. Maybe 4.1's-4.2's now....lighter wheels.

With some T-sauce he gets into the 3's easy, and sometimes runs the 93 program. He's had no issues, and that's more than the majority of us can say.

Ohh and the cars logs look very similar, he might be a tad richer, but yours looks good.


Nice car.
Old 12-12-2008, 12:05 PM
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Default Good to know.

Thanks for sharing the info. It's hard to find logs of APR Stage 3 especially on 91 octane.
Old 03-02-2009, 11:58 AM
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Default Interesting. Looks good, just slow :) I guess that's what APR is all about...

Nice and smooth but conservative. I bet if you add any fuel it won't do much to midrange timing but may as well play with it. You may have to force some timing addition via Lemmi. Looks like you have some room.

Talk to MarinS4 (Tom) and X-1 (Jon) who both had APR running on 91. They were able to squeeze some more power out of it.
Old 03-02-2009, 12:01 PM
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Default Carter, I considered buying my APR kit from you, rememeber? I ended up buying it NIB from another

guy that was part of your original group buy.

Anyway, I'll log again when I get around to fixing the compressor inlet leak. I'm just not looking forward to doing this job.

Thanks for the info.


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