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Descreening the Maf

This is a discussion on Descreening the Maf within the External Engine forums, part of the LSx Technical Help Section category; Are there any negative effects or things that can happen from descreening the maf? I've heard that it's not recommended ...

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    Rice Hungry GottaHaveLS1's Avatar
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    Descreening the Maf

    Are there any negative effects or things that can happen from descreening the maf? I've heard that it's not recommended for street cars and also to not mess with it at all...

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    Grand Imperial Wizard Sarge's Avatar
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    Retired Outlaw Sum Bitch

    Leave it alone.

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    Yep, don't mess with it.

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    Rice Hungry GottaHaveLS1's Avatar
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    What about port and polishing?

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    Space Cadet RainMan's Avatar
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    Quote Originally Posted by GottaHaveLS1
    What about port and polishing?
    Not recommended! Risk trashing the MAF.

    The only MAF Mods I've personally dealt with involving screens and internal Mods were with the older TPI cars. I modded the MAF on my '86 IROC (screens out & hacked off heat sinks) and have had no problems, and it is the original OEM MAF that came on the car 19 yrs ago (crossing fingers).

    The MAF is a fragile piece and unless you really know what you are doing, don't mess with it. There are aftermarket MAF's & TB's available, although $$, will save you the headache of trashing your OEM pieces.

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    Grand Imperial Wizard Sarge's Avatar
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    Port and Polish the throttle body you bet....I use Mark Shaner...best in the business and immediate gains.... http://www.s2performance.net/

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    Senior Member MadSeason's Avatar
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    Bad Idea, stock MAF easily supports 500HP without becomming a restriction. After that get the Z06 Maf and program in the Tables. Without the screen your A/F reading will be more random and harder to tune

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    WS6 to Z06 TransAmMan's Avatar
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    So is there even a use or hp gain from getting say a SLP MAF?

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    Senior Member MadSeason's Avatar
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    http://www.gmhightechperformance.com...11htp_projls1/

    according to them SLP MAF adds 2.7HP and 2.8TQ the extra flow is not worth it, dyno numbers change like that pull to pull. The SLP is junk, espically since those have a resistor in them and use that to translate readings the maf would normally put out.

    On the dyno over at SpeedINC in chicago those aftermarket MAFs are frowned upon because you can't do a proper tune with them. The best way to go is with the z06 maf, a harness, and programming in those tables that the aftermarket MAFs would rather fudge numbers for using a resistor. Even then it's overkill unless you're going for a 90/90 setup and are over 500HP to really see a difference on the dyno that I doubt you will even feel.
    Last edited by MadSeason; 12-15-2005 at 11:53 AM.

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    WS6 to Z06 TransAmMan's Avatar
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    so I shouldn't even mess with the MAF unless I'm 500hp or over?

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    Senior Member MadSeason's Avatar
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    nope, i think people do it because it's something simple that can be done in 15 mins or less. that money can be spent elsewhere and get more HP per dollar

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    WS6 to Z06 TransAmMan's Avatar
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    like what I don't know what to do now other then full exhaust haha .I was going to do SLP MAF and some sort of aftermarket TB.

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    Senior Member MadSeason's Avatar
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    Work on the suspension, get that power to the ground, with complete aftermarket setup running on my car I got a 1.9 60 foot on balding street tires. Can't wait to see what I'll get with my nittos in the spring. You have a 99, look into the z06 intake manifold. That and a port/polished tb will be worth some good gains

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    Senior Member Nhra Firebird's Avatar
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    Quote Originally Posted by TransAmMan
    like what I don't know what to do now other then full exhaust haha .I was going to do SLP MAF and some sort of aftermarket TB.
    save for more costly mods

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    Keep the stock MAF. I still run mine screened.
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    We'll be back... GatorSS's Avatar
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    Descreening the MAF, in and of itself, results in virtually no gain. Porting and polishing it is where you can gain power (especially with proper tuning), and to do so requires descreening. It's not complicated, but unless you know what you're doing, it's best to leave it to professionals.

  17. #17
    CookieMonster
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    a lid, full exhaust, and a ported throttle body will flow as much air as you can deal with. Don't fvck with the MAF! LOL

    Get a better intake manifold, eventually, but first do the longtubes!

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    Junior Member Mad-Max's Avatar
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    don't mess with a good thing

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