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Will MAF Frequecy change my A/F Ratio For WOT?

Old 06-08-2005, 04:43 PM
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Question Will MAF Frequecy change my A/F Ratio For WOT?

I have to change my MAF table will this screw my WOT tune?Thanks guys
Scott
Old 06-08-2005, 05:06 PM
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Originally Posted by Pro Mouse
I have to change my MAF table will this screw my WOT tune?Thanks guys
Scott
It will change it for sure, especially if it's not accurate in the frequency ranges corresponding to airflow above 4000 RPM. The MAF is used for airflow measurements exclusively above 4K. If you tweak the MAF to artificially read more air is coming in than actual, you'll go rich (more air=need more fuel). The reverse is true as well. You may have to adjust your PE table accordingly.
Old 06-08-2005, 05:31 PM
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Darn It ! I dont have WIDE Band o2'sMy car was tuned this way on the Dyno
Old 06-08-2005, 05:44 PM
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If you get your MAF dialed in correctly, you should be able to tweak it on the dyno using their wideband. That's what I'm going to do next time. I wanted a dyno baseline with a solid VE/MAF calibration. I saw KR at WOT and decided not to adjust anything. I've gotten rid of the false KR, now it's time to go back and adjust PE table and advance for max power.

Why don't you calibrate the MAF and take it for a nice run/scan? You can always look at the narrowband as a rough guideline. That'll get you an idea, and if you get KR you'll know it's lean--or false like it was with me.


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