Too much air, not enough fuel??? - Page 2 - G35Driver - Infiniti G35 & G37 Forum Discussion

Jun 4, 2009 | 01:16 PM

#16

Jeff92se

Red Card Crew

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From: ɐʍ 'ǝlʇʇɐǝs

Quote:

Originally Posted by Defs

I highly doubt your AFR is "bad" at WOT. This engine uses a MAF sensor, not a MAP sensor. It will "see" the increased airflow and compensate.

You won't blow your engine with some basic NA mods like you have.

I was under the impression that at WOT the ecu uses predetermined fuel pulses per maf reading and ignores what the 02 is sensing. The ecu cannot compensate for changes if the airflow is too different as it's no longer using the 02 sensor to see a lean condition. Could be wrong though

Jun 4, 2009 | 02:00 PM

#17

gabe3d

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From: Bay Area, Ca

I recently did a few dyno runs while installing my mods in a couple of steps.

-dyno
-header, tp, exhaust
-dyno (loss power)
-afr adjustment
-dyno (gained power)
-air intake, spacer, mrev2
-dyno (loss power again)
-afr adjustment
-dyno (gained power)
-uprev tune
-dyno (gained power)

In every instance where i loss power i was running lean.