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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 10-28-2007, 08:12 AM   #1
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Descreening the MAF?

Is it safe to do this?
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Old 10-28-2007, 08:26 AM   #2
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Out of curiosity, will you see any sort of gain from it? Free mods aren't really worth it if you risk something that can be detrimental.
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Old 10-28-2007, 08:28 AM   #3
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Im getting a new MAF soon so ill see if it does anything. Think about it. The holes are tiny in the MAF so by taking it out, its less restrictive.

EDIT: If you think stuff will get in the engine from this, it would have already happened because the air filter actually filters the air, not the MAF, surprise!
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Old 10-28-2007, 09:07 AM   #4
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you will gain nothing imho.



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Old 10-28-2007, 09:13 AM   #5
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Ill gain like +20whp + the drivetrain gain of 78%. That should put me at about 300whp.

Will it throw off the MAF?
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Old 10-28-2007, 09:15 AM   #6
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Quote:
Originally Posted by saabkid37 View Post
you will gain nothing imho.
x2
I dont think it is worth the potential damage to the MAF.

Quote:
Originally Posted by LeGiT SaaB View Post
EDIT: If you think stuff will get in the engine from this, it would have already happened because the air filter actually filters the air, not the MAF, surprise!
By the same reasoning the air filter is the much bigger restriction than the screens of the MAF, I see no reason to mess with it and risk breaking something for a possible hp or two. I would say the biggest gain will be had when you swap in a brand new MAF or even cleaning your old one.
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Old 10-28-2007, 12:12 PM   #7
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The only thing that the screen does is remove the turbulence from the airflow so the MAF can get an accurate reading. By removing it you make it so your MAF can not accurately gauge the amount of air entering your engine and it will throw your fueling off.
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Old 10-28-2007, 12:18 PM   #8
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Quote:
Originally Posted by 90SPG View Post
x2
I dont think it is worth the potential damage to the MAF.
x3
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Old 10-28-2007, 12:40 PM   #9
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Thanks for the info
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Old 10-28-2007, 12:42 PM   #10
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This has bad news written all over it if you pull that screen.
In addition to smoothing the airflow, I must assume that it is also there to prevent something from hitting the tiny sensors that pick up all that fancy information that makes your car run nicely
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Old 10-28-2007, 01:18 PM   #11
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Thats why ill try it when I get my new MAF
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Old 10-28-2007, 01:48 PM   #12
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In the c900 world, you can remove the screen in the AMM...MAF to all you new car types. I did it to one of my AMM's and felt no difference.

If you have a leftover, might as well give it a shot. Just don't break the little tiny wires. Then it wont work at all...
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Old 10-28-2007, 02:19 PM   #13
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My take - if there is no gain, and you risk damaging stuff, then why even consider doing it?

The screen is there for a reason. It does NOT prevent the car from making lots of horsepower (I'd be willing to bet that none of the higher powered T7 cars on this forum took out the MAF grid) then it is NOT a good idea.

It's not a way to make power, only a way to risk having the sensor misread, or risk damaging the sensor when removing it.

Don't do it, just buy a tune instead.
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Old 10-28-2007, 02:32 PM   #14
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Ok thanks, I dont think ill be doing this. I read on some VW and Chevy forums that they noticed a gain after performing the "operation".
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Old 10-28-2007, 02:45 PM   #15
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I've always wondered if those screens are put in to evenly regulate the flow of air and not there to act as a filter. I would be afraid of doing anything to disrupt what goes on inside the MAF.
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Old 10-28-2007, 04:12 PM   #16
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I don't think they're there to stop shot from getting in the MAF. Think about it, although small, the holes are definatly large enough to a particle though, while in operation, to damage the wires.

I think they are either there to even out the airflow, or they are there to keep the unit from being damaged while out of the car (sitting on a parts shelf, while being installed in the car, during shipping, etc.)

Its just a good idea to leave 'em in. If you want some real gains get a turbonator.
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Old 10-28-2007, 04:43 PM   #17
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Its a common free mod in the turbo buick community, but they have 2 and I think only remove the 1. How many do T7 cars have? (screens)
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can be prone to failure due to increased localized stresses in the hole penetrations
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Old 10-28-2007, 05:25 PM   #18
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T-7 has screen in the MAF, and down in the throttle body.
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Old 10-28-2007, 10:38 PM   #19
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Quote:
Originally Posted by LeGiT SaaB View Post
Ok thanks, I dont think ill be doing this. I read on some VW and Chevy forums that they noticed a gain after performing the "operation".
Some of those cars have much larger much thinker screens, i had a guy bring in his from an old buick i believe, the thing was about 1.5 inches deep (3-4cm)

I would say that you could take out one safely if you felt like it.

I'd say theres no issue removing grid 1 because if you keep an air filter on as long as the car is on, you have a sealed environment that should protect the sensor.

The other side though is not so good, if you turbo decides to go south, then you might have some stuff coming back up that pipe destroying the sensor.



(yes, sometimes i have this kind of time...)
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Old 10-29-2007, 05:29 AM   #20
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Bad Idea. this is a very crucial sensor and you risk ruining the calibration and how it works. it's made to work WITH a screen.

get a downpipe.
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