Question about MAF
Thread Starter
Burning Brakes
Joined: Aug 2007
Posts: 992
Likes: 3
From: Chesterfield Michigan
St. Jude Donor '08-'09-'10-'11-'12-'13-'14
Question about MAF
Will a performance mass airflow sensor (specifically a Granatelli) do any good for my 2002 Z06? Why or why not?
thanks
thanks
Race Director
Joined: Oct 2002
Posts: 16,477
Likes: 26
From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
Waste of $.
Any supposed gains an aftermarket MAF might offer, is done simply by fooling the PCM tune.
It works like this...the PCM is preloaded with data about the specific MAF in the car...At any given reported MAF frequency, the MAF sends that to the PCM. The PCM then references a table that converts frequency to airflow data, and from that, can determine how much air the engine is actually consuming.
Aftermarket MAF's claim to increase hp by merely altering the actual reported values, effectively tricking the PCM. It might gain a hp or two, but it's a very hack approach of accomplishing it. You'd be far better off spending that money to have someone knowledgeable tune your car proper, using real, accurate values to maximize performance.
The actual sensor is not much of an airflow restriction, certainly not more than the intake manifold itself is, and you won't max out the stock MAF's frequency capability until about the 600rwhp mark.
If/when you do find the stock MAF's limit, you'll also know the single best MAF modification you can make is simply eliminating it completely.
Any supposed gains an aftermarket MAF might offer, is done simply by fooling the PCM tune.
It works like this...the PCM is preloaded with data about the specific MAF in the car...At any given reported MAF frequency, the MAF sends that to the PCM. The PCM then references a table that converts frequency to airflow data, and from that, can determine how much air the engine is actually consuming.
Aftermarket MAF's claim to increase hp by merely altering the actual reported values, effectively tricking the PCM. It might gain a hp or two, but it's a very hack approach of accomplishing it. You'd be far better off spending that money to have someone knowledgeable tune your car proper, using real, accurate values to maximize performance.
The actual sensor is not much of an airflow restriction, certainly not more than the intake manifold itself is, and you won't max out the stock MAF's frequency capability until about the 600rwhp mark.
If/when you do find the stock MAF's limit, you'll also know the single best MAF modification you can make is simply eliminating it completely.
Melting Slicks
Joined: Mar 2005
Posts: 2,891
Likes: 4
From: North Port Fl
I bought a ported TB from a supporting vendor. He is a very well respected tuner. I told him I was going to purchase a Granatelli MAF sensor. He advised me not to. He said he would not attempt to tune a car with a Granatelli MAF sensor installed. They cause nothing but problems.
