To de-screen or not to de-screen a MAF

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Feb 22, 2015 | 03:25 PM

djmarch

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From: Mid Mo.

Car: 1989 GTA - Gunmetal grey

Engine: 5.7 ltr.

Transmission: 700R4

Axle/Gears: 3:27 9 Bolt Borg Warner

To de-screen or not to de-screen a MAF

I'm sure there's been many threads on this whether to de-screen or not to de-screen a MAF, but would appreciate getting new comments on this.

Thanks in advance.

Feb 22, 2015 | 03:29 PM

Tuned Performance

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From: Mile High Country !!!

Car: 1967 Camaro, 91 z28

Engine: Lb9

Transmission: M20

Axle/Gears: J65 pbr on stock posi 10bolt

Re: To de-screen or not to de-screen a MAF

I wouldn't, it changes the airflow slightly and in effect changes the gps feedback.

Feb 22, 2015 | 05:46 PM

86LG4Bird

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From: Bright, IN

Car: '86 Bird, 96 ImpalaSS, 98 C1500XCab

Engine: LG4, LT1, L31

Transmission: 700R4, 4L60E, 4L60E

Axle/Gears: 3.73 Tors, 4.88 spool, 3.73 Eaton

Re: To de-screen or not to de-screen a MAF

^Agreed^ Don't do it.
I've tried it on several vehicles, but in most cases caused issues like Tuned mentioned with no gains. And those "issues" are not consistent, thus difficult or impossible to tune around.

Feb 23, 2015 | 03:54 PM

Cosmik Debris

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From: Christchurch, New Zealand

Re: To de-screen or not to de-screen a MAF

It depends on why you want to de-screen it. If your engine needs more air then you need a bigger diameter MAF. It is unlikely that removing the screen will increase the air flow that much if your engine is starving. The restriction in air flow, if there is one, is more likely to be in the filter system in front of the MAF.