[Z06] 2001 MAS Screen Removed
Thread Starter
Intermediate
Joined: Feb 2006
Posts: 28
Likes: 0
2001 MAS Screen Removed
Having upgraded the intake via Blackwing and long tube/high flow cats on the exhaust of my 01 ZO6 I just couldn't resist removing the MAS Screen. In hind site I'm now aware the "screen" is actually a device to remove air turbulance prior to the sensor interpreting the air flow. Although the car seems to run OK I'm curious if I made a mistake and perhaps need to consider one of the aftermarket MAS high performance units which, I beleive, doesn't require the afore mentioned screen. Any comments appreciated! Ed
Safety Car
Joined: Mar 2004
Posts: 4,048
Likes: 1,478
From: South Florida
i noticed a slight drop in gas mileage and a rougher idle when I took my MAF screen out of my 2001 Z06. I am going to be getting HP tuners soon so I am sure I can fix those 2 issues with a little tuning.
Team Owner
Joined: Mar 2001
Posts: 25,889
Likes: 7
From: Virginia Beach
CI 3-5-6-7-8 Veteran
I pulled mine out just prior to getting dyno-tuned. The screen is there to straighten out the air flow so the MAF can get a more accurate reading. However, it's there because that same MAF unit is used in other GM vehicles with curvey intake tracts. On the Z06 the air intake lid has a hole in the center so the air allready has a nice straight path and the screen is not needed. However, on the LS2 in the C6 it air comes from the sides of the box and they went back to the screen. Also, some say that since the TB is smaller than the MAF the screen isn't a restriction at all. But, like you while I was tuning everything up getting ready for my dyno tun I couldn't resist pulling it out... but I did have it all tuned for.
Drifting
Joined: Apr 2004
Posts: 1,530
Likes: 250
From: CT
Cobra4B has it right, at least from what I have read. You should not have any problem with the screen removed with the Blackwing. That said, I would hesitate to install one of the dual filter intakes with right and left filters (unless you plan to leave the screen in) since that arrangement could cause turbulence at the MAFS.
From what I know, there are no gains with aftermarket MAFS for the 2001-04 models. For the 1997-00 years it's possible to get 4-5 rwhp by going with a poly MAFS, the best I have found is the one made by MTI Racing, Marieta GA but there may be others out there.
The difference in the size of the MAFS and the TB have nothing to do with removing the screen. The amount of air flow past the heated wires in the MAFS is what matters and by removing the screen you have increased the flow across the wires.
You have made enough changes in air flow that a tune would be worthwhile to dial in the A/F ratio.
I am not a tuner, these are just my own experiences. Hope this helps.
From what I know, there are no gains with aftermarket MAFS for the 2001-04 models. For the 1997-00 years it's possible to get 4-5 rwhp by going with a poly MAFS, the best I have found is the one made by MTI Racing, Marieta GA but there may be others out there.
The difference in the size of the MAFS and the TB have nothing to do with removing the screen. The amount of air flow past the heated wires in the MAFS is what matters and by removing the screen you have increased the flow across the wires.
You have made enough changes in air flow that a tune would be worthwhile to dial in the A/F ratio.
I am not a tuner, these are just my own experiences. Hope this helps.
Le Mans Master
Joined: May 2005
Posts: 6,366
Likes: 249
From: Fort Lauderdale, Florida
There is no problem with removing the screen. GM removed it on newer Z06's, there is none on my stock MAF. It is of no benefit on Z06 intakes other than being a restriction. Also, don't waste your money on aftermarket MAF's, especially if you are considering a Granatelli. They are a waste of money and can cause problems you don't have now.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
