Z32 MAF Offset in Nistune adr file.

[Steve88t]

I've been seeing maf voltages up around 5-5.5v and know I'm not moving that much air. So after some discussion and digging around the nistune forum I found reference to a different offset for Z32 N62 maf's.

Basically, I'm saying if you are using a Z31 ecu and a Z32 maf with the three resistors removed from the check circuit, you need to open your address file in notepad and change the "LEGACY_AFM_OFFSET=1500" to "0" or remove this entry entirely. I cannot say if this applies to any other meters at this time.

This is only a software concern for calculations in the nistune software. It has no other implication for other tuning methods.

[Bernardd]

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[Chris86NA2T]

Steve88t wrote: I've been seeing maf voltages up around 5-5.5v and know I'm not moving that much air. So after some discussion and digging around the nistune forum I found reference to a different offset for Z32 N62 maf's.

Basically, I'm saying if you are using a Z31 ecu and a Z32 maf with the three resistors removed from the check circuit, you need to open your address file in notepad and change the "LEGACY_AFM_OFFSET=1500" to "0" or remove this entry entirely. I cannot say if this applies to any other meters at this time.

This is only a software concern for calculations in the nistune software. It has no other implication for other tuning methods.

you must have read my mind. i made the same assumption like 2 days ago and posted a question on the nistune forum.. matt replyed and confirmed that with the 3 resistors removed, "LEGACY_AFM_OFFSET" should be changed from 1500 to 0.

[Steve88t]

Bernardd wrote: make sure to post some datalogs in the nistune forum so we can "critique" your tune.

YOU are going to critique my tune. You think so huh?

Oh crap, I'm going to get embarrassed now. I think this may have a lot to do with why what things "should" be and what things "are" have not been lining up. Once I really start to get a grasp of things I'll post everything for public ridicule. I cerainly will appreciate the help of more experieced users.

[Steve88t]

Well as I am starting to learn more about what things do, I have made some huge improvements. Car runs a LOT better but still has bumps and holes in power delivery. Today I did some more logging.

My max TP was in the 95 column with the following values:
10psi 60-1/stage3 no IC
RPM - 4975
TP - 23612 (not sure how to convert that down to compare to the scale)
MAF - 4.16 (z32 maf with offset corrected)
AFR - 11.69
Timing - 25

This is on 91 octane gas but most of the work was done using 87 so I know I need to start from the begining and alter a good deal of it. Also with having no IC the 11.69 is probably a bit leaner than I should be using. But considering it is not pinging one bit anymore, I am pretty happy with it.

[Bernardd]

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[Steve88t]

DOH! Something so simple yet I never thought of it. Thanks Bernard.