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De-screen MAF? Yes or No...

This is a discussion on De-screen MAF? Yes or No... within the General Help forums, part of the LSx Technical Help Section category; Originally Posted by Johns00Z28 Did you notice any gains though by descreening and ported ends? I'd be interested in seeing ...

  1. #21
    Member danziger's Avatar
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    Quote Originally Posted by Johns00Z28 View Post
    Did you notice any gains though by descreening and ported ends? I'd be interested in seeing a before and after dyno.
    Hard to say as I did the ported ends in conjunction with other mods. Do I think it was anything more than a few rwhp? Nope, not really. Am I trying to reduce any potential bottle-necks in a high-HP application? Absolutely. I'm not going to preach screen-removal, especially with all the negativity on here, but I will say that I don't think it's the big deal that everyone makes of it.

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    car enthusiast djvaly's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    Leave the screen.

    The sensors are designed to meter the air with the screen in place.
    yep, and he doesn't wanna mess with the A/F ratio if those sensors are off... no gain from it either.

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    Make real real sure Johns00Z28's Avatar
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    And it had no affect on drivability? Seems like some people are saying that it'll affect how the air goes through the maf by removing the screen but if the z06 didn't have it, not sure why it'd affect ours.
    Vote for Pedro.

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    Quote Originally Posted by Johns00Z28 View Post
    And it had no affect on drivability? Seems like some people are saying that it'll affect how the air goes through the maf by removing the screen but if the z06 didn't have it, not sure why it'd affect ours.
    the z06 may have been altered a bit. i dont know.

    my whole reasoning is WHY? waste of time, no gains, and a hassle.

    most of the free mods are ahem...free for a reason. i havent seen a really high hp car killing everyone because he hacked up the air box.

    take those mods with a grain of salt atleast.

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    Make real real sure Johns00Z28's Avatar
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    Yeah I'm just curious cause I plan on doing some induction mods here in the near future. So I'm just wondering if any of this stuff is worth doing while I'm in there but if it's a waste of time I'll just skip it.

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by Johns00Z28 View Post
    And it had no affect on drivability? Seems like some people are saying that it'll affect how the air goes through the maf by removing the screen but if the z06 didn't have it, not sure why it'd affect ours.
    Different airflow track.
    Different calibration.

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    no more 4th gen secondgearscratch's Avatar
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    Quote Originally Posted by Johns00Z28 View Post
    Yeah I'm just curious cause I plan on doing some induction mods here in the near future. So I'm just wondering if any of this stuff is worth doing while I'm in there but if it's a waste of time I'll just skip it.
    in brutal honesty i would just fabricate your own intake. if you dont, most of the lids, stock size tb's maf's, and cold air intakes are all around the same quality and offer around the same gains (or lack of in most cases).

    im sure i will get flamed for this, but i think the ported factory throttle body is a crock of shit too.

    (i have one so im qualified to make the statement...barely).

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    Grand Imperial Wizard Sarge's Avatar
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    Or just go with a SD tune. SD tunes kick that ass.

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    Quote Originally Posted by Sarge View Post
    Or just go with a SD tune. SD tunes kick that ass.
    What is a SD tune?

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    Put the maf down! Dont fool with it.

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    Life in the Fast lane sunsetorangess's Avatar
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    The maf screen is only there to straighten out airflow, Gm realized this and stopped putting the screens on "straight intakes" Thats why the vettes dont have them anymore. Now if your talking about say a gm truck or even a lt1 where the intake is off to one side then the screen is needed. You wont see any gains from pulling the screen, it acutaly helps ya, it collects the big garbage that may slip past your filter. Iv found grass and some odd stuff stuck on the screen.
    J
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    Not much of a filter if stuff that big is getting by..lol

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    NO Don't you are NOT going to gain shit!!!
    Other than through the MAF out of calibration. If you are going to get a custom tune after then yes other wise NO.

    And before anyone else tries to respond about they did it and it didn't cause any problems that doesn't mean shit!!
    I have also put 300 shot on a stock motor and it lasted for a year that doesn't mean it's right.

    If you are stuck on doing it my key response for you is do it and watch PIDS afterwords. Your fuel trim will be all over the place trying to correct your MAF that isn't reading right now.
    If you spend a little time doing different worded searches in our tool bar we have debated this MANY times before. And we have went into detail about parameters that it effects.
    Don't be afraid of the bottle!!! Be afraid of your tune!!!

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    Life in the Fast lane sunsetorangess's Avatar
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    Quote Originally Posted by Johns00Z28 View Post
    Not much of a filter if stuff that big is getting by..lol
    I would have to agree, thats why the K&N is sitting in the box with very few miles on it and no chance of seeing my airbox again. It sits next to the Nitto's lol.
    J

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    Quote Originally Posted by Mr. Luos View Post
    Different airflow track.
    Different calibration.
    Same "airflow track"...although I think you mean intake tract. I have both, so it's easy to compare. What does calibration have to do with the screen supposedly straightening the air? Not trying to be an ass, but I really think the screen removal has "urban legend" status.
    Last edited by danziger; 10-08-2007 at 02:03 AM.
    2000 Z28 382/nitrous...sold and missed.
    2004 Z06 CE Z16...still looks stock.

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    Quote Originally Posted by Johns00Z28 View Post
    And it had no affect on drivability? Seems like some people are saying that it'll affect how the air goes through the maf by removing the screen but if the z06 didn't have it, not sure why it'd affect ours.
    My MAF was never a source of trouble or issue to tune. Any drivability issues? None.

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    Quote Originally Posted by Sarge View Post
    Or just go with a SD tune. SD tunes kick that ass.
    I cannot lie. I have recently gone with a Speed Density tune on my Z28 that renders the MAF a non-issue. I can assure you guys that it wasn't because of my screen removal!

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    Quote Originally Posted by LS2Tuner View Post
    NO Don't you are NOT going to gain shit!!!
    Other than through the MAF out of calibration. If you are going to get a custom tune after then yes other wise NO.

    And before anyone else tries to respond about they did it and it didn't cause any problems that doesn't mean shit!!
    I have also put 300 shot on a stock motor and it lasted for a year that doesn't mean it's right.

    If you are stuck on doing it my key response for you is do it and watch PIDS afterwords. Your fuel trim will be all over the place trying to correct your MAF that isn't reading right now.
    If you spend a little time doing different worded searches in our tool bar we have debated this MANY times before. And we have went into detail about parameters that it effects.
    Your fuel trims are off because the ECM is trying to compensate for MORE airflow without the restrictive screen in place.




    (Disclaimer: My post is based upon purely subjective and hypothetical deductive reasoning. My only intent here is to "stir the pot.")

  19. #39
    Member danziger's Avatar
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    In 5 minutes of searching I found three decent threads on that "other" LS1 site. The threads have plenty of arguments for and against screen removal:
    http://www.ls1tech.com/forums/showth...ght=screen+maf
    http://www.ls1tech.com/forums/showth...en#post6282842
    http://www.ls1tech.com/forums/showth...ght=screen+maf

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    Even if taking the screen off does give you some small benefit of HP/TQ I would think the benefit would be so little it wouldnt be worth it. Kind of like the throttle body bypass mod.

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