LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related
View Poll Results: Descreening the MAF. Good or bad?
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Descreening the MAF. Good or Bad?

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Old Dec 1, 2006 | 01:04 PM
  #16  
TobyZ28's Avatar
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From: BC
Well now that your past the point of no return, some people have descreened without any "noticable" results while driving. It does flow better, there is less of an obstruction. I would never recommend it of course for the reasons in the previous posts.

During daily driving immedatly after swapping in a descreened maf you may notice a difference, but the computer will adjust it back soon after.

For WOT though, I'm not 100% sure on this, but if the MAF is now flowing say 1000gps and the sensor is reporting it as 900gps the engine will be running a bit lean (only at WOT though!). You may notice a little bit of extra power in this case if you were running a bit rich at wot. The opposite can also be true.

During daily driving the long term trims will evenetually even out because of the O2's. But it will be less accurate overall!
Old Dec 1, 2006 | 01:15 PM
  #17  
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well good so i shouldnt have a heart attack then? lol....well i guess that works out good...because at WOT i have been running a lil rich i think. So in the long run everything should even out?....if worse comes to worse and i notice that it has hurt my car i will order a new screen.... but in my mind id ont see it doing anything terrible...only improving air flow
Old Dec 1, 2006 | 01:20 PM
  #18  
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So in the long run everything should even out?....

Well the best way to put it is that the computer will adjust the best it can, but because the readings are no longer as accurate it probably won't run as best as it could with a properly working MAF.

At one velocity the MAF may read too high, then due to turbulances it may read low at another. Air flow can be a complicated thing 8) The comp will just adjust the best it can around this.
Old Dec 1, 2006 | 01:24 PM
  #19  
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so perfmormance wise i did more harm then good?
Old Dec 1, 2006 | 01:34 PM
  #20  
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If you get a custom tune tell them that you descreened your MAF and they will add some airflow to the MAF tables. I know PCM for less's tables are pretty well dead on. I have used the tables that they gave me in a tune that they did for me and everything works out really well.
Old Dec 1, 2006 | 01:44 PM
  #21  
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From: Haverhill MA
Originally Posted by WS Sick
If you get a custom tune tell them that you descreened your MAF and they will add some airflow to the MAF tables. I know PCM for less's tables are pretty well dead on. I have used the tables that they gave me in a tune that they did for me and everything works out really well.
so when i get a tune (madz28.com or PCM4less) i can tell them and they can take care if it? i just think it adds more air flow and the tuner can adjust the pcm to match that.....

is this what you did?
Old Dec 1, 2006 | 02:00 PM
  #22  
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From: Oklahoma where trees are made of wood.
Originally Posted by CamaroRacing12
so when i get a tune (madz28.com or PCM4less) i can tell them and they can take care if it? i just think it adds more air flow and the tuner can adjust the pcm to match that.....

is this what you did?

Pretty much, the problem with this really, is that the path that the air flows through TO to MAF twisting and turning every which way, making the air favor one side of the MAF, wether the straightening vanes were there or not the air would flow uneven over the elements, If they wanted it truly straight over them they would be closer than they are to the elements. A high and low pressure area exist in any piece of tube that something flows through.
Old Dec 1, 2006 | 04:19 PM
  #23  
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From: Haverhill MA
i see....
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