MAF Screens
Thread Starter
Pro
Joined: Jun 2003
Posts: 559
Likes: 6
From: OKC OK
MAF Screens
I found a thread over in the Gen Disc Community about maf screens. I'd heard about removing the screens but hadn't heard anything definitive enough to make me want to put at risk a $300.00 part...until...I read and confirmed this link...
http://www.geocities.com/jgkov/MAFMod.html
... I've been up a while guys and I didn't take notes but (surfing several websites) these numbers appear to be accurate. So I went out to the car and took the maf off and before I could talk myself out of it again I removed the screens. It took all of maybe 15 minutes from unlocking the door, opening the hood, removing the maf, taking it to my work bench, removing the screens, cleaning it up, reinstalling it and putting the key in the ignition. I quick trip down to the hiway and ... WOW... SHE BREATHES! Before this mod I was only getting about 4800rpm out of her and that took what I thought was too long...I was tach'ing 5500 UP the on ramp before the merging lane! I like it! :cheers:
A big :thumbs: to this mod performance wise. The only question now is longevity.
:seeya
http://www.geocities.com/jgkov/MAFMod.html
... I've been up a while guys and I didn't take notes but (surfing several websites) these numbers appear to be accurate. So I went out to the car and took the maf off and before I could talk myself out of it again I removed the screens. It took all of maybe 15 minutes from unlocking the door, opening the hood, removing the maf, taking it to my work bench, removing the screens, cleaning it up, reinstalling it and putting the key in the ignition. I quick trip down to the hiway and ... WOW... SHE BREATHES! Before this mod I was only getting about 4800rpm out of her and that took what I thought was too long...I was tach'ing 5500 UP the on ramp before the merging lane! I like it! :cheers:
A big :thumbs: to this mod performance wise. The only question now is longevity.
:seeya
Pro
Joined: May 1999
Posts: 503
Likes: 0
From: Austin TeXas
Re: MAF Screens (MtlSphere)
I've been hesitant to perform this mod... The information I've seen implies the purpose of the screens is not to keep debris from the MAF elements, (the air filter does that function) but to smooth the airflow through the MAF... So I've wondered what a 'compromise' kind of mod would do, like leaving the front screen in place, and only removing the rear screen.??!? Anyone else ever considered this??
Team Owner
Joined: Sep 2001
Posts: 62,127
Likes: 1,727
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: MAF Screens (88-L98-Z52)
Its a proven mod to help L98s. It wont hurt anything to remove them, as long as your filter is blocking the dirt.
Drifting
Joined: Jul 2002
Posts: 1,488
Likes: 4
From: Frostburg MD
Re: MAF Screens (88-L98-Z52)
I'd thought about just pulling the rear screen and leaving the front screen for protection. Are the screens different between a L98 and an LT1? I can't see how my screens would staighten out the airflow, they look like what you'd see in a screen door or window, really flat like that.
Burning Brakes
Joined: May 2000
Posts: 958
Likes: 0
From: Brisbane, Australia 1985 Coupe
Re: MAF Screens (88-L98-Z52)
.. So I've wondered what a 'compromise' kind of mod would do, like leaving the front screen in place, and only removing the rear screen.??!? Anyone else ever considered this??
Drifting
Joined: Aug 2000
Posts: 1,521
Likes: 0
From: West Islip New York
Re: MAF Screens (Chris O')
.. So I've wondered what a 'compromise' kind of mod would do, like leaving the front screen in place, and only removing the rear screen.??!? Anyone else ever considered this??
I was wondering the same thing! :yesnod:
I was wondering the same thing! :yesnod:
I gotta get a life :D
Le Mans Master
Joined: May 2003
Posts: 5,203
Likes: 0
From: Las Vegas Nevada
Re: MAF Screens (1MoorTym)
If you look at those screens I would say it does more to screw up the airflow than straighten it out. I have to say its for protection of the element and not the airflow. But maybe the engineer figured that one out after a ripper then night before.
I have not done it yet....want to just cant bring myself to do it. :cry
I have not done it yet....want to just cant bring myself to do it. :cry
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Le Mans Master
Joined: May 2003
Posts: 5,203
Likes: 0
From: Las Vegas Nevada
Re: MAF Screens (1MoorTym)
Well...that looks good....should at least prevent a bird strike on the element. Won't do much for smaller vermin. :lol: :thumbs:
Just an afterthought. What if the weakend screen is sucked into the plenum... :confused:
One more afterthought. Did you go blind?
[Modified by Southern Comfort, 7:30 PM 7/31/2003] :crazy:
[Modified by Southern Comfort, 7:31 PM 7/31/2003]
Just an afterthought. What if the weakend screen is sucked into the plenum... :confused:
One more afterthought. Did you go blind?
[Modified by Southern Comfort, 7:30 PM 7/31/2003] :crazy:
[Modified by Southern Comfort, 7:31 PM 7/31/2003]
Burning Brakes
Joined: Dec 2002
Posts: 1,088
Likes: 0
From: Lakeland fl
Re: MAF Screens (MtlSphere)
I removed only my rear screen. Unfortunately I have no seat of the pants comparison because I also installed the procharger 10psi at the same time! I left my front in because its downstream of the supercharger and felt it was a safety to leave the front screen. I do however love the idea of removing some of the wires while still affording a little protection- great idea! Im gonna have to do mine.
Thread Starter
Pro
Joined: Jun 2003
Posts: 559
Likes: 6
From: OKC OK
Re: MAF Screens (=Agent-Smith=)
Was talking with my buddy...Mr Goodwrench... He pulled out an ancient looking manual from his bookshelf. I read where the screens are designed to "diffuse" the air flow for more consistent signals to the ECM. Then he asked what took me so long to cut them out? He did say the LS1's suffer when the screens are removed but the L98's really come alive. Noting the difference in CFM rating before and after. He mentioned it would be in my best interest now to install a smooth snorkel ahead of the maf from the air cleaner to clean up the flow and reduce turbulence as much as possible. I asked him about some of the reservations that have been raised on this forum. He told me that the screens are not designed for protection but for "diffusing" and back in the day it was felt that the screens were over engineered from detroit resulting restricted air flow...his advice cut and run...and clear the 'puter. :seeya
Le Mans Master
Joined: Feb 2002
Posts: 7,858
Likes: 2
Re: MAF Screens (shotchkiss)
I'd thought about just pulling the rear screen and leaving the front screen for protection. Are the screens different between a L98 and an LT1? I can't see how my screens would staighten out the airflow, they look like what you'd see in a screen door or window, really flat like that.
Le Mans Master
Joined: Feb 2002
Posts: 7,858
Likes: 2
Re: MAF Screens (MtlSphere)
Ask him how MAF screen removal effects the LT1. Just curious. I think the LT1 screen helps more than hurts.
Was talking with my buddy...Mr Goodwrench... He pulled out an ancient looking manual from his bookshelf. I read where the screens are designed to "diffuse" the air flow for more consistent signals to the ECM. Then he asked what took me so long to cut them out? He did say the LS1's suffer when the screens are removed but the L98's really come alive. Noting the difference in CFM rating before and after. He mentioned it would be in my best interest now to install a smooth snorkel ahead of the maf from the air cleaner to clean up the flow and reduce turbulence as much as possible. I asked him about some of the reservations that have been raised on this forum. He told me that the screens are not designed for protection but for "diffusing" and back in the day it was felt that the screens were over engineered from detroit resulting restricted air flow...his advice cut and run...and clear the 'puter. :seeya
Safety Car
Joined: May 2002
Posts: 4,010
Likes: 26
From: Somewhere nowhere
Re: MAF Screens
yes indeed, they are "air straightening screens", not debris screens.
yes indeed, they hurt perfomance, however the MAF is designed to read straightened air, not unstraightened air.
The LS6 engineers were mandated to redesign the MAF so it could correctly read unstraightened air in the Z06.
and lastly I have found bees and other debris in my MAF screen, so I choose to leave the screens in.
yes indeed, they hurt perfomance, however the MAF is designed to read straightened air, not unstraightened air.
The LS6 engineers were mandated to redesign the MAF so it could correctly read unstraightened air in the Z06.
and lastly I have found bees and other debris in my MAF screen, so I choose to leave the screens in.
Le Mans Master
Joined: Apr 2000
Posts: 6,341
Likes: 1
From: Shelton CT
Re: MAF Screens (larryfs)
yes indeed, they are "air straightening screens", not debris screens.
yes indeed, they hurt perfomance, however the MAF is designed to read straightened air, not unstraightened air.
The LS6 engineers were mandated to redesign the MAF so it could correctly read unstraightened air in the Z06.
and lastly I have found bees and other debris in my MAF screen, so I choose to leave the screens in.
yes indeed, they hurt perfomance, however the MAF is designed to read straightened air, not unstraightened air.
The LS6 engineers were mandated to redesign the MAF so it could correctly read unstraightened air in the Z06.
and lastly I have found bees and other debris in my MAF screen, so I choose to leave the screens in.
[Modified by MrNuke, 5:09 PM 8/1/2003]