MAF, stock or not?
Thread Starter
Drifting
Joined: Dec 1999
Posts: 1,330
Likes: 36
From: Waynesboro, PA
Co-winner 2020 C4 of the Year - Modified
MAF, stock or not?
Should I use my stock MAF meter with the vortech blower setup, or should I use my Granatelli MAF? What are the pros/cons of each? Apparently the tuning of the aftermarket one is different, as well as the flow capacity. Thanks for your help.
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Re: MAF, stock or not? (POLOVETTE 94)
Use the stock MAF. Unless you have calibrated the PCM with the calibration curve of the aftermarket MAF. But in order to do that you would have to have a calibration curve from the MAF vendor. Basically the stock MAF is the one to use because the PCM contains the correct curve. The con side of things is that if the aftermarket MAF is off then the PCM will have skewed fuel trims trying to correct the AFR that it senses with the O2 sensors.
