Modding the maf
Thread Starter
Racer
Joined: Mar 2006
Posts: 498
Likes: 0
From: Columbus GA
Modding the maf
I have an 01 ZO6 and was thinking about the mass air meter. Could you remove the screen? Say with a drimal tool? I know they sell aftermarket ones, but if I can do it and save money than thats free HP. Please help, as I don't want to make a big mistake. Feel free to PM me as I have to go to work for the day. Thanks in advance.
Safety Car
Joined: Jun 2004
Posts: 3,549
Likes: 738
From: panama city beach florida USA
St. Jude Donor '09
i might be wrong but the z doesnt have a screen. to descreen will start a big debate on line . some say no some yes . i say yes . dont expect a huge power surge
Safety Car
Joined: Sep 2003
Posts: 3,558
Likes: 2
From: Cape Coral FL
The '01 Z has a screen on the MAF. The screened MAF has different values in the MAF calibration table for the frequency cells. Removing the screen will skew the frequency slightly lower due to an altered metered vs unmetered ratio of air flow through the MAF. The lower frequencies will fool the PCM into thinking there is less air flowing so it will compute the amount of fuel and timing accordingly. This will cause the engine to run slightly leaner unless recalibrated. Whether it works to your benefit or throws a code seems to be by chance. Some that have done it have no issues and a little more power, some throw codes.
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If you want to remove the screen you can by getting something in the MAF like a wooden dowel, I used a new pencil, from behind and push it out slowly going around the perimiter being VERY careful not to touch the thermistors. This way, if you throw a code or want to go back for some reason you can just push it back in from the front.
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If you want to remove the screen you can by getting something in the MAF like a wooden dowel, I used a new pencil, from behind and push it out slowly going around the perimiter being VERY careful not to touch the thermistors. This way, if you throw a code or want to go back for some reason you can just push it back in from the front.
Le Mans Master
Joined: Jul 2002
Posts: 7,370
Likes: 8
From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
Originally Posted by BOTTLE FED
The screen should just "push" out. It's been a while since I did mine, but it just about a min.
Just use a small pick to grab it and then pull it right out.
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Safety Car
Joined: May 2000
Posts: 4,827
Likes: 351
From: Albuquerque NM
If you push it out you can't put it back. Why not get a set of aftermarket MAF ends? They flow better than the stock ones with or without the screen AND if this mod doesn't work for you, you can put the stock ends back on, screen intact, no damage done.
Racer
Joined: Dec 2005
Posts: 261
Likes: 0
From: Metro Detroit MI
Originally Posted by 6Speeder
If you push it out you can't put it back. Why not get a set of aftermarket MAF ends? They flow better than the stock ones with or without the screen AND if this mod doesn't work for you, you can put the stock ends back on, screen intact, no damage done.
Safety Car
Joined: Sep 2003
Posts: 3,558
Likes: 2
From: Cape Coral FL
You CAN put it back in, if you remove it carefully. I've done it on mine.
Also, an '01 Z has an 85mm MAF, they don't come apart like a 75mm MAF, and nobody makes 85mm ported ends for them because of this.
Also, an '01 Z has an 85mm MAF, they don't come apart like a 75mm MAF, and nobody makes 85mm ported ends for them because of this.
Safety Car
Joined: Jul 2005
Posts: 4,275
Likes: 4
From: Vancouver WA
GM went with a screenless MAF in 02 for the Z's. Before that, GM was making one MAF fit all. But the C5 doesn't really need the screen due to the straight air flow of the intake system. The screen was really made vehicles like trucks that had too much turbulence in it's air flow path.
O1' Z06 (385 HP) 85mm screened MAF
02' Z06 (405 HP ) 85mm no screen MAF.
O1' Z06 (385 HP) 85mm screened MAF
02' Z06 (405 HP ) 85mm no screen MAF.
Thread Starter
Racer
Joined: Mar 2006
Posts: 498
Likes: 0
From: Columbus GA
I'm going to try it as soon as my Halltech tric comes in the mail. I'll try a pencil eraser to push it out. Next on the list will be headers and X-pipe. Not looking for much, just 11's in the 1320.