MAF Screen Removal
Racer
Joined: Oct 2002
Posts: 266
Likes: 0
From: San Angelo Texas
Re: MAF Screen Removal (ICUALL)
1. Once you have the air box assembly out, then seperate the filter holder from the MAF. You can use a small screw driver on the clamp. I would recommend replacing it with a hose clamp for easy removal in the future.
2. Then there should be four screws holding the MAF housing together. Take them out and remove the end of the MAF with the screen. Be careful not the damage the actual sensors.
3. Push the screen out and put the MAF back together.
Simple as that. :cool:
2. Then there should be four screws holding the MAF housing together. Take them out and remove the end of the MAF with the screen. Be careful not the damage the actual sensors.
3. Push the screen out and put the MAF back together.
Simple as that. :cool:
Safety Car
Joined: Sep 2003
Posts: 3,558
Likes: 2
From: Cape Coral FL
Re: MAF Screen Removal (ICUALL)
Don't do it unless you plan on geting an LS1Edit tune to recalibrate the MAF tables. :nono: You will lose hp and torque because the air velocity passing the MAF wires is what is important, NOT volume. The PCM tables are built with the MAF screen installed and will return less agresive numbers for spark advance and A/F mixture without it.
Safety Car
Joined: May 2000
Posts: 4,812
Likes: 345
From: Albuquerque NM
Re: MAF Screen Removal (ArKay99)
Don't do it unless you plan on geting an LS1Edit tune to recalibrate the MAF tables. :nono: You will lose hp and torque because the air velocity passing the MAF wires is what is important, NOT volume. The PCM tables are built with the MAF screen installed and will return less agresive numbers for spark advance and A/F mixture without it.
Instructor
Joined: Nov 2003
Posts: 168
Likes: 0
From: Jennings LA
Re: MAF Screen Removal (ICUALL)
I removed my MAF screen and did not use the LS! edit. I recieved trouble codes for about a month or so. But have not had any problems since. I have upgraded the rest of my intake also.
Le Mans Master
Joined: Oct 1999
Posts: 8,205
Likes: 40
From: Tucson AZ
Re: MAF Screen Removal (BHP)
True for '01+years, keep screen in. These cars run leaner than '97-'00. Removing the screen on '99-'00 helps without tuning plus new MAF ends.
Burning Brakes
Joined: Aug 2002
Posts: 1,090
Likes: 8
From: Indianapolis Indiana
Re: MAF Screen Removal (ICUALL)
I did the mod on my '01 some time ago. Mistake?
Anyone have experience with a Grannatelli MAS? Is it worth the money? I put one in my Camaro SS that I had and it seemed to help that. Any comments fer or agin?
Anyone have experience with a Grannatelli MAS? Is it worth the money? I put one in my Camaro SS that I had and it seemed to help that. Any comments fer or agin?
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Melting Slicks
Joined: Oct 2001
Posts: 2,075
Likes: 0
From: Central NJ
Re: MAF Screen Removal (ndirishr1)
I did the mod on my '01 some time ago. Mistake?
Anyone have experience with a Grannatelli MAS? Is it worth the money? I put one in my Camaro SS that I had and it seemed to help that. Any comments fer or agin?
Anyone have experience with a Grannatelli MAS? Is it worth the money? I put one in my Camaro SS that I had and it seemed to help that. Any comments fer or agin?
Safety Car
Joined: Aug 2003
Posts: 4,988
Likes: 16
From: Hooterville, NJ
Re: MAF Screen Removal (carpe dm)
True for '01+years, keep screen in. These cars run leaner than '97-'00. Removing the screen on '99-'00 helps without tuning plus new MAF ends. Have some holiday punch, and forget the mod. :D
Safety Car
Joined: Oct 2002
Posts: 4,434
Likes: 1
From: Austin TX
Cruise-In IV Veteran
Cruise-In V Veteran
Cruise-In VI Veteran
St. Jude Donor '03-'04-'05
Re: MAF Screen Removal (ICUALL)
:lurk: Interesting. I have thought about removing it on my 03. I guess I'll keep it in for now.
Race Director
Joined: Oct 2002
Posts: 11,945
Likes: 12
From: Vancouver
2015 C5 of Year Finalist
St. Jude Donor '05-'06-'07-'08-'09-'10
Re: MAF Screen Removal (GTC)
I thought the '02's came with no screen. But to my surprise I have one. But after reading this post I think I will leave well enough alone.
Season's Greetings guys and gals it's been another great year here on the forum. The place is a wealth of info. Thanks. :thumbs: :seeya
Season's Greetings guys and gals it's been another great year here on the forum. The place is a wealth of info. Thanks. :thumbs: :seeya
Safety Car
Joined: Sep 2003
Posts: 3,558
Likes: 2
From: Cape Coral FL
Re: MAF Screen Removal (ndirishr1)
I did the mod on my '01 some time ago. Mistake?
Anyone have experience with a Grannatelli MAS? Is it worth the money? I put one in my Camaro SS that I had and it seemed to help that. Any comments fer or agin?
Anyone have experience with a Grannatelli MAS? Is it worth the money? I put one in my Camaro SS that I had and it seemed to help that. Any comments fer or agin?
Intermediate
Joined: Mar 1999
Posts: 40
Likes: 0
From: Naples FL
Re: MAF Screen Removal (mcd_57)
1997 and 1998 LS1's have 74mm MAF's with screens. They also have an overly rich fuel/air ratio. Removing the screens from the MAF's on these cars leans them out and adds 5 to 7 horsepower at the rear wheels, with no negative effects or trouble codes.
1999 and 2000 LS1's also have 74mm MAF's with screens, but they have a more optimum leaner fuel/air ratio. Removing the screens from the MAF's on these cars generally adds 2 to 3 horsepower at the rear wheels, usually with no negative effects or trouble codes.
2001 and newer LS1's and 2001 LS6's have 85 mm MAF's with screens. Because of the increased MAF diameter and PCM programming, removing the screens from the MAF's on these cars does not add any horsepower and can trigger trouble codes.
2002 and newer LS6's have 85 mm MAF's without screens, with related PCM programming changes.
[Modified by C5BTW, 7:20 AM 12/26/2003]
1999 and 2000 LS1's also have 74mm MAF's with screens, but they have a more optimum leaner fuel/air ratio. Removing the screens from the MAF's on these cars generally adds 2 to 3 horsepower at the rear wheels, usually with no negative effects or trouble codes.
2001 and newer LS1's and 2001 LS6's have 85 mm MAF's with screens. Because of the increased MAF diameter and PCM programming, removing the screens from the MAF's on these cars does not add any horsepower and can trigger trouble codes.
2002 and newer LS6's have 85 mm MAF's without screens, with related PCM programming changes.
[Modified by C5BTW, 7:20 AM 12/26/2003]
Thread Starter
Drifting
Joined: Jul 2002
Posts: 1,329
Likes: 8
From: Corpus Christi Tx.
Re: MAF Screen Removal (ICUALL)
For anyonee who might be following this thread, a short update. After weighing the pro's and cons, I decided to remove the screen today. Well after removing the MAF sensor housing from my 2000 coupe I found that I DID NOT have a screen in it. So 96,000 miles with no screen and no problems......
Melting Slicks
Joined: Jul 2002
Posts: 2,375
Likes: 39
From: Charlotte NC
Re: MAF Screen Removal (C5BTW)
Dont take them out of your going FI if it originally had it.. I just had to buy another MAF with a screen :mad
[Modified by MyFirstCorvette, 12:46 AM 12/26/2003]
[Modified by MyFirstCorvette, 12:46 AM 12/26/2003]
Pro
Joined: Sep 2002
Posts: 709
Likes: 2
From: East Peoria Illinois
Re: MAF Screen Removal (ICUALL)
I added a Blackwing and removed the MAF screen on my '01' coupe
with an automatic. Now I can spin the tires through the traction control.
Before the mods I could only chirp the tires. :lol:
with an automatic. Now I can spin the tires through the traction control.
Before the mods I could only chirp the tires. :lol: