Descreening the MAF
Descreening the MAF i kno this a topic that had been thrown around a bunch of times but is it really worth it? the main reason im holding back is because when i had my mecahnic rebuilding my tranny he took a look at the screen and found a dead hornet and a bird feather. i have no idea how that could get in there but it did. all my friends tell me to take it out but i dont kno if the pros outweigh the cons in this one.
please leave it in. it aint gonna do u a damn bit of good taking it out. first of all, the screen isnt there to keep dust and debris out of your motor. its there to create an even flow of air so your sensors get an accurate reading. the mafs arent highly accurate as it is, but thats the main purpose of your screen, as the filters job is keeping debris out of your motor.
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Originally Posted by 02BEAST
Ripped mine out absolutely no problems at all it was dynoed tested and gained 4HP to the rear wheels.Now if you plan on going off roading lol then leave it in. 
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Originally Posted by Grifter
My point exactly, 4HP that you're not going to feel.
Tech Resident
Joined: Jan 2006
Posts: 5,117
Likes: 3
From: Philly
Originally Posted by 02BEAST
Every little bit helps especially when you cross the finish line first and they wonder why thats why every bit helps enough said.
unless you're running a dry shot of nitrous, there is no point in descreening the MAF. all you're asking for is problems. it's one of those things that can only hurt, and if you're lucky, you'll see nothing at all.
Originally Posted by 02BEAST
Ripped mine out absolutely no problems at all it was dynoed tested and gained 4HP to the rear wheels.Now if you plan on going off roading lol then leave it in.
1.) the time it took you to descreen the MAF allowed the engine to cool down enough where you picked up a few horsepower
2.) the dyno just varied
pull your car on the dyno 10 times in a row without changing a thing. the car won't dyno exactly the same. the MAF descreen had NOTHING to do with your 4 rwhp gain.
took the words right out of my mouth!!!!! 
i did occasionally find a little piece of something in the screen of my maf but I just upgraded to a Z06 maf and they don't come with screens, so it can't be that big of a deal if GM didn't use them on it
Tech Resident
Joined: Jan 2006
Posts: 5,117
Likes: 3
From: Philly
Originally Posted by jimmypop13
i did occasionally find a little piece of something in the screen of my maf but I just upgraded to a Z06 maf and they don't come with screens, so it can't be that big of a deal if GM didn't use them on it
I actually gained 10 horsepower on the dyno by desreening the maf. This was on the same day on back to back pulls. This was also on a bigger cube motor with a 90/90 setup wich leads me to beleive that the maf was a restriction any way.
The only way descreening it will be worth some power is on a complete bolt on head and cam car.
The only way descreening it will be worth some power is on a complete bolt on head and cam car.
this is pretty much wat i was hoping to hear. my friends seem to be believers of every little bit counts. but i dont think its something that will help me win races.
Originally Posted by ChocoTaco369
descreening your MAF is not going to help you beat anyone. if you beat them, you would have beaten them anyway. if you lose, you would have lost with or without the screen.
unless you're running a dry shot of nitrous, there is no point in descreening the MAF. all you're asking for is problems. it's one of those things that can only hurt, and if you're lucky, you'll see nothing at all.
no, you didn't. that's called dyno variance. did you dyno on the same day? was the temperature, humidity and your air/fuel ration exactly the same every time? even if you did back to back dyno runs, a dyno will yield slightly different results every time. if you did NOT do the dynos on the same day, the results are guaranteed not from the MAF descreening. even if you DID dyno on the same day back to back, here are the possible scenarios:
1.) the time it took you to descreen the MAF allowed the engine to cool down enough where you picked up a few horsepower
2.) the dyno just varied
pull your car on the dyno 10 times in a row without changing a thing. the car won't dyno exactly the same. the MAF descreen had NOTHING to do with your 4 rwhp gain.
unless you're running a dry shot of nitrous, there is no point in descreening the MAF. all you're asking for is problems. it's one of those things that can only hurt, and if you're lucky, you'll see nothing at all.
no, you didn't. that's called dyno variance. did you dyno on the same day? was the temperature, humidity and your air/fuel ration exactly the same every time? even if you did back to back dyno runs, a dyno will yield slightly different results every time. if you did NOT do the dynos on the same day, the results are guaranteed not from the MAF descreening. even if you DID dyno on the same day back to back, here are the possible scenarios:
1.) the time it took you to descreen the MAF allowed the engine to cool down enough where you picked up a few horsepower
2.) the dyno just varied
pull your car on the dyno 10 times in a row without changing a thing. the car won't dyno exactly the same. the MAF descreen had NOTHING to do with your 4 rwhp gain.
Joined: Nov 2003
Posts: 6,216
Likes: 236
From: Wichita KS / Rancho San Diego
Originally Posted by shoemike
it`s more of a problem that your air box doesn`t seal properly.
Originally Posted by RevGTO
IMO, leave the screens in. I don't believe the 4 RWHP from removing the screen.