99 MAF vs. 85mm MAF
99 MAF vs. 85mm MAF Why would a stock 99 MAF have a higher Hz Flow (grams/second) than an uncalibrated 85mm MAF? One would think that the 85mm would have the higher Hz Flow (grams/second) because it's larger. It should flow more air but at less velocity. Also what would it matter if the 85mm MAF was calibrated or not?
<small>[ June 18, 2002, 02:17 AM: Message edited by: 99 TA ]</small>
<small>[ June 18, 2002, 02:17 AM: Message edited by: 99 TA ]</small>
On The Tree
Joined: Nov 2001
Posts: 168
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From: Michigan
Re: 99 MAF vs. 85mm MAF I think the Smaller MAF is showing higher HZ because it's moveing the same amount of air as the Larger MAF, but at a faster rate. ie: Same fart ... smaller straw!
I think the calibrating business sets the output frequency to read lower than what is actually flowing through the MAF. The result is the engine gets more air than what is being reported by the larger MAF's output signal to the PCM. The PCM responds by keeping ingnition timeing high. The engines throttle responce under load is altered, some see this as a mod.
Ron
I think the calibrating business sets the output frequency to read lower than what is actually flowing through the MAF. The result is the engine gets more air than what is being reported by the larger MAF's output signal to the PCM. The PCM responds by keeping ingnition timeing high. The engines throttle responce under load is altered, some see this as a mod.
Ron
Re: 99 MAF vs. 85mm MAF don't know the answer to your first question, but calibration matters because it converts the MAF frequency to correspond with the airflow used in the computer to determine load.
