MAF sizes and features question
Thread Starter
Melting Slicks
Joined: Mar 2005
Posts: 2,252
Likes: 181
From: NE OH
MAF sizes and features question
**Update: Pictures of the MAF and measurements have been added below. **
So here's how I 'thought' MAF sizes/features went.
97-01 78mm MAF with 3 wire hook-up
02-04 85mm MAF with 5 wire hook-up
So...I picked up a spare 3-wire MAF I have in the garage and decided to use my new digital calipers to test it.
Being that's it's three-wire I should come up with 78mm somewhere..right?
Inside diameter is 85mm (3.3"), outside is 90mm (3.5")
Wall thickness of the MAF is 2.5mm, which makes sense, as the OD is 5mm larger than the ID.
comments?
So here's how I 'thought' MAF sizes/features went.
97-01 78mm MAF with 3 wire hook-up
02-04 85mm MAF with 5 wire hook-up
So...I picked up a spare 3-wire MAF I have in the garage and decided to use my new digital calipers to test it.
Being that's it's three-wire I should come up with 78mm somewhere..right?
Inside diameter is 85mm (3.3"), outside is 90mm (3.5")
Wall thickness of the MAF is 2.5mm, which makes sense, as the OD is 5mm larger than the ID.
comments?
Last edited by muncie21; Oct 28, 2006 at 09:31 PM.
Melting Slicks
Joined: Jun 2004
Posts: 3,439
Likes: 6
From: Newark, DE
St. Jude Donor '06
Originally Posted by muncie21
So here's how I 'thought' MAF sizes/features went.
97-01 78mm MAF with 3 wire hook-up
02-04 85mm MAF with 5 wire hook-up
97-01 78mm MAF with 3 wire hook-up
02-04 85mm MAF with 5 wire hook-up
97-00 75mm MAF with 3 wire hook-up
01-04 85mm MAF with 5 wire hook-up
02-04 85mm MAF with 5 wire hook-up & no screen (Z06 only)
I can't explain what you measured.
Le Mans Master
Joined: Apr 2002
Posts: 6,927
Likes: 3
From: Glendale NY
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18- '19
MAF Question
Originally Posted by Mr. Lucky
There were actually three versions:
97-00 75mm MAF with 3 wire hook-up
01-04 85mm MAF with 5 wire hook-up
02-04 85mm MAF with 5 wire hook-up & no screen (Z06 only)
I can't explain what you measured.
97-00 75mm MAF with 3 wire hook-up
01-04 85mm MAF with 5 wire hook-up
02-04 85mm MAF with 5 wire hook-up & no screen (Z06 only)
I can't explain what you measured.
Thread Starter
Melting Slicks
Joined: Mar 2005
Posts: 2,252
Likes: 181
From: NE OH
Originally Posted by 6SPD98
Will the 01-04 85mm with 5 wire hook-up work on a 97-00 car which called for a 75mm unit? Is the plug the same?
The good news is that they make plug adapters for the MAF/IAT and other adapters for the air bridge.
Safety Car
Joined: Jul 2001
Posts: 4,661
Likes: 67
From: Ocean Springs MS
Originally Posted by 6SPD98
Will the 01-04 85mm with 5 wire hook-up work on a 97-00 car which called for a 75mm unit? Is the plug the same?
Thread Starter
Melting Slicks
Joined: Mar 2005
Posts: 2,252
Likes: 181
From: NE OH
Here are some pictures for the 'show me' crowd out there. 
What we've got here is a 3-wire MAF.
So...being a 3-wire job, it should measure 78mm right?
hmmm, not here. OD is 90.xxmm
OK, so what about the ID....
Uhh, nope...measures right at 85mm
Guys I gotta be missing something here....tell me what it is!
What we've got here is a 3-wire MAF.
So...being a 3-wire job, it should measure 78mm right?
hmmm, not here. OD is 90.xxmm
OK, so what about the ID....
Uhh, nope...measures right at 85mm
Guys I gotta be missing something here....tell me what it is!
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Race Director
Joined: Apr 2001
Posts: 19,329
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From: Saint Augustine, FL
Mid-TN Events Coordinator
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
Very interesting. Do you have a newer true 85mm MAF to compare with? Also, do you have a metric ruler you can measure with just to confirm that your digital caliper is measuring correctly.
I have to admit, I'm confused. I have always heard that the 1997-2000 MAF is a 3" and the 2001+ is a 3.5" I was about to upgrade to a newer MAF, but now I'm not so sure it's needed.
I have to admit, I'm confused. I have always heard that the 1997-2000 MAF is a 3" and the 2001+ is a 3.5" I was about to upgrade to a newer MAF, but now I'm not so sure it's needed.
Team Owner
Joined: May 2004
Posts: 26,345
Likes: 232
From: SoCal
Maybe your filter is allowing dirt to pass. Then after billions of cubic feet of dirty air passing thru the TB at high speeds there has been a slow attrition of the ID.
Now this is just MAYBE.......
DH
Now this is just MAYBE.......
DH
Melting Slicks
Joined: Jun 2005
Posts: 3,088
Likes: 61
From: NY- 2013 Corvette Challenge Champion-2013 Index Combo Champion 2015 CC/MM Champion
St. Jude Donor '07
Originally Posted by 6SPD98
Will the 01-04 85mm with 5 wire hook-up work on a 97-00 car which called for a 75mm unit? Is the plug the same?
Melting Slicks
Joined: Jun 2005
Posts: 3,088
Likes: 61
From: NY- 2013 Corvette Challenge Champion-2013 Index Combo Champion 2015 CC/MM Champion
St. Jude Donor '07
Now that you have me wondering,Yesterday I bought a 01 ZO6 mass air (5 wire plug)from auto zone for my 97.On the screen side outside to outside it is 98mm,inside is close to 94mm.Other side, outside is 93.50mm,inside is 88.90mm
.....................Paul
.....................Paul
Le Mans Master
Joined: Apr 2002
Posts: 6,927
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From: Glendale NY
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18- '19
Maf Sensor
Originally Posted by DRIVER456
