Yes or no
Thread Starter
Pro
Joined: Apr 2006
Posts: 747
Likes: 0
From: Perth Western Australia
Yes or no
this subject and all its answers confuses me 
(which admittedly inst hard
) so in a yes or no answer, is it worth my time spent, pulling out the MAF screens on a mostly stock car (without emisions)??
appologies, i know this subject has been done to death
, but it will be the first and last time i ever ask it
(which admittedly inst hard ) so in a yes or no answer, is it worth my time spent, pulling out the MAF screens on a mostly stock car (without emisions)??appologies, i know this subject has been done to death
, but it will be the first and last time i ever ask it
Elite Torch Red Member
Joined: Sep 1999
Posts: 57,805
Likes: 23
From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
CI-II Burnout & Drag Champ
St. Jude Donor '03-'04-'05-'06-'07
If it ain't broke, don't fix it.
In other words, I say leave it alone, it isn't going to hurt.
In other words, I say leave it alone, it isn't going to hurt.
Le Mans Master
Joined: Jan 2006
Posts: 6,564
Likes: 6
From: Woodstock Georgia
this subject and all its answers confuses me (which admittedly inst hard ) so in a yes or no answer, is it worth my time spent, pulling out the MAF screens on a mostly stock car (without emisions)??
appologies, i know this subject has been done to death , but it will be the first and last time i ever ask it
(which admittedly inst hard ) so in a yes or no answer, is it worth my time spent, pulling out the MAF screens on a mostly stock car (without emisions)??appologies, i know this subject has been done to death
, but it will be the first and last time i ever ask it
Navigator
Joined: Feb 2007
Posts: 9
Likes: 0
From: Newnan GA
I have to chime in on this one, I did this on an LT1 a few years ago and saw no change what so ever. I'm sure that when you start mod's of the intake and throttle body, that it might improve airflow by straightening out the flow but with stock parts I can't see the difference.
Just my opinion, but it's not something that needs done.
James
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
On an LT1 it usually doesnt help at all, I recall some people losing time after having done it, but on an L98 its a marginal help that cant hurt anything since the L98 needs all the airflow it can get. (I do remember some LT4 owners getting something from it, so I'm not sure whats up there, could be a calibration issue) A descreened MAF with heat sink fins removed can flow 100-200cfm more by some measurements I have seen, but its up to you, we cant use all that cfm one can flow anyway.
Are you going to feel it though? nope.
Are you going to feel it though? nope.
Last edited by vader86; Mar 19, 2007 at 11:06 PM.
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Verdad Gallardo
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
The air resistance from that small screen is so small that you won't gain squat. Leave it there, GM put it there to protect the hot wire air flow sensor. A long time ago there was a thread by a C4 1/4 mile drag enthusiest. He was comparing MAF against speed density for the lowest possible 1/4 mile times. One test, he had the speed density sensor ahead of his stock disconnected MAF and ran the same time as the MAF. Here you have much more induction losses than a fine wire screen and it didn't make a bit of difference. Leave the screen alone!!!!!!!!!!
Drifting
Joined: Dec 2006
Posts: 1,771
Likes: 1
From: Cuyahoga Falls Ohio
You forgot mentioning "chip". Someone will come to your house and smack you for that.
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
No - but my original and screenless MAF (it was a big thing to do back in '89) has replaced at least a couple of new, screened (and broken) MAF's which I bought to replace it when I decided that descreening was a bad idea. Those screened MAFS just don't last and obviously, descreening, increases the longevity of the part. So tear away at will knowing that you'll never have to replace it again. Otherwise, the MAF either reads the correct air flow into the engine - or it doesn't - the screens don't matter.
Thread Starter
Pro
Joined: Apr 2006
Posts: 747
Likes: 0
From: Perth Western Australia
No - but my original and screenless MAF (it was a big thing to do back in '89) has replaced at least a couple of new, screened (and broken) MAF's which I bought to replace it when I decided that descreening was a bad idea. Those screened MAFS just don't last and obviously, descreening, increases the longevity of the part. So tear away at will knowing that you'll never have to replace it again. Otherwise, the MAF either reads the correct air flow into the engine - or it doesn't - the screens don't matter.
i have an intermittent code 36 problem with my car, rarely happens (like once in every 20 'drives'), but Does happen, ive done and checked EVERYTHING to fix the problem short of replacing the maf and ecm, but stll get the code every now and again.
my you say your old maf was good cos you de-screened it? whats the chances (if any) of de-screening my maf.... and the code 36 never returning?
(i realise the screens have absolutely nothing to do with the burn off function but im really getting desperate with that one)
Last edited by ozvette87; Mar 20, 2007 at 10:22 PM.
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Absent a hard code, MAF problems often result in a Rich or Lean Condition because it's not reading the correct air flow and that's a problem with the hot wire or the internal circuitry. I somewhat doubt your intermittent 36 has anything to do with either - it involves the Burnoff circuit and an intermittent connection is more probable. Check wiring and connectors at the Relays and the Sensor. Ohm out the Black Wire from Terminal C at the MAF to Terminal D12 at the ECM. Wriggle the wire around and move the connector up and down at the MAF to see if that sets the 36.