Ho no ! Another MAF Screen Post
Thread Starter
Instructor
Joined: May 2006
Posts: 244
Likes: 1
From: Paris, France
Ho no ! Another MAF Screen Post
But this one is different.
I've got hptuners and a wideband so I can tune my MAF with or without screen.
but...
I've installed a Callaway Honker which relocate to MAF next to the Throttle Body. They're really a short path between them.
Is it a good idea then to remove the screen ?
Callaway is 50 states legal with C5 but non with 02-05 C5 Z06 (ie maf without screen)
Any experience ? thoughts ?
I've just buy an LS6 intake si I have to retune my VE tables... to descreen or not descreen, that is the question
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
If it came with a screen, the screen should stay. The screen makes the driveability better by preventing erratic events due to non-linear airflow across the sensor. If you want no screen, buy the Z06 MAF and re-write your MAF table. JMHO 
Drifting
Joined: Feb 2007
Posts: 1,993
Likes: 7
From: LaPine Oregon
'01 LS6 w/ screen ...........
The '01 LS6 with MAF screen and the '02-'04 w/out. GMPT engineers left the screen on the MAF to 'straighten' out air flow. Over looked on the '01 ZO6 M/Y it was removed in later model years because it was not needed as the air flow has a relatively straight shot from the air fliter box to the MAF with the new ( LS6 '01 M/Y) air box and larger lid opening in LS6 '02 M/Y. According to Asst Chief engineer John Juriga; the addition of the '02-'04 Z06 air box and the removal of the MAF strightener screen brought approx 5 hp increase.
Any use of the MAF with an air intake duct that curves just before the MAF, needs the straightener ( or screen) for the MAF to sense acturatley. Which is why , in GM's conventional wisdom , they left the screen on. We have been de-screening the MAF in conjuction with rerouting the ducting with no problems .
I have added the '02 Z06 air box and removed the screen ( plus swapped out the '01 Z06 exhaust for the '02 Z06 exhaust.). Had the PCM recalibrated .No problems with low speed drivability as some have reported with just the removal of the OEM MAF straightener screen on LS1 applications.
Any use of the MAF with an air intake duct that curves just before the MAF, needs the straightener ( or screen) for the MAF to sense acturatley. Which is why , in GM's conventional wisdom , they left the screen on. We have been de-screening the MAF in conjuction with rerouting the ducting with no problems .
I have added the '02 Z06 air box and removed the screen ( plus swapped out the '01 Z06 exhaust for the '02 Z06 exhaust.). Had the PCM recalibrated .No problems with low speed drivability as some have reported with just the removal of the OEM MAF straightener screen on LS1 applications.
Last edited by dieseldave56; Nov 18, 2008 at 02:25 PM. Reason: add info resource
Tech Contributor
Joined: Jan 2007
Posts: 19,419
Likes: 1,146
From: Dyer, IN
But this one is different.
I've got hptuners and a wideband so I can tune my MAF with or without screen.
but...
I've installed a Callaway Honker which relocate to MAF next to the Throttle Body. They're really a short path between them.
Is it a good idea then to remove the screen ?
Callaway is 50 states legal with C5 but non with 02-05 C5 Z06 (ie maf without screen)
Any experience ? thoughts ?
I've just buy an LS6 intake si I have to retune my VE tables... to descreen or not descreen, that is the question
Le Mans Master
Joined: Jun 2006
Posts: 6,979
Likes: 31
From: Wichita KS
