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The Screen on my MAF

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Shadowing1985v

Guest
Is it a good thing to just cut that little screen out of it

i read it holds back air

what do u guy's think, is this a good idea
 

Rabbit

Well-known member
Joined
Dec 19, 2001
Messages
956
Location
sonoma ca usa
Corvette
2004 C5 coupe, MSGM & 2014 Cad SRX Crystal red
I think your better off leaving it alone.
IMHO.
 

Topless

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Joined
Nov 12, 2001
Messages
444
Location
San Diego, CA
Corvette
1992 Convt w/hard top; 2004 Z06 Z16; 1962 327/300
it is supposed to straighten the air so that the MAF reads accurate.
 
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Shadowing1985v

Guest
hmm

i got this information off of TPIS site
 
B

Black Ice

Guest
I think that screen is a heating element that measures mass. DONT TOUCH IT
 

Ken

Gone but not forgotten
Joined
Jan 30, 2001
Messages
8,236
Location
Hermosa Beach, CA
Corvette
1987 Z51 Silver Coupe
The screen is there to prevent debris from entering the intake manifold. If you are using a good air filter such as a K&N unit, there stands little chance of any debris getting into the system.

There has been some talk as to the screens straightening the airflow, but the argument is still open for discussion. IMHO it doesn't hurt to remove the screens, and the airflow is definitely improved (I forget exactly how much more cfm of air is available by removing the screens, but it is significant).

The wire you see inside the MAF is the sensing element, it is heated to burn off any contaminants.

The Bosch Mass Air Flow sensor uses a heated wire to measure the amount of air entering the engine. This heated wire features a burn-off function that cleans the wire after the engine has been run by heating it red-hot.

Burn-off occurs when the engine is shut down after being run in closed loop. The ECM grounds the black wire connected to terminal D12 which energizes the pull-down windings in the burn-off relay. This applies 12 volts to the heated wire, causing it to heat up, glow red, and burn off anything that may have stuck to it during the last drive.

_ken :w
 

Derek

Well-known member
Joined
Mar 21, 2002
Messages
94
Location
Melbourne,Australia
Corvette
1989 red C
The MAP sensor has 2 screens...one front and one rear,one would assume its safe to remove the rear screen
The heated wire is cooled by the mass of air flowing passed it ,thus changing the voltage in the wire,this provides a measurement of the amount of air coming into the engine
Derek

:w
 

BigRed

Well-known member
Joined
May 23, 2001
Messages
948
Location
Edmonton
Corvette
1985 Bright Red Rocket
This last week I took a LONG look at mine.. And ya they are just guards for the MAF wires.

Because I cut out my filter lid Ive already lost some protection if by chance a POS gets through my filter (K&N) and makes it to the MAF Im in for a 500$ Fix so I decided to leave the front guard alone.

However there is two, so If I take the rear screen off towards the Throttle body will I even gain anything?
 
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Shadowing1985v

Guest
hmm

I thought i only saw one screen

i will look again i guess,,

does cutting out your air box really help, Big red?

im thinking of doing it,, but im stlil confused wha ti cut off, hehe
 
S

Shadowing1985v

Guest
hmm

I thought i only saw one screen

i will look again i guess,,

does cutting out your air box really help, Big red?

im thinking of doing it,, but im stlil confused wha ti cut off, hehe
 

supernatural400

Well-known member
Joined
Feb 25, 2001
Messages
410
Location
massachusetts
Corvette
1993 SuperNatural 400 #5 /99 LS1 Z28 N2O equipped
Your better off not cutting the screens on your current MAF end, go out and buy new anodized ends that have no screens and save the originals for if and when you decide to sell the car you can you put the originals back on.
 

supernatural400

Well-known member
Joined
Feb 25, 2001
Messages
410
Location
massachusetts
Corvette
1993 SuperNatural 400 #5 /99 LS1 Z28 N2O equipped
Re: hmm

Shadowing1985v said:
I thought i only saw one screen

i will look again i guess,,

does cutting out your air box really help, Big red?

im thinking of doing it,, but im stlil confused wha ti cut off, hehe

No. all your doing is recirculating hot air the trapped inside the engine bay . to truly get any benefit from the Air box, replace it with a ram air system that will draw cool air from outside the car
 
S

Shadowing1985v

Guest
yeah

Im building my own RAM system in a week or so

and put a K&N in as well
 

Redbob

Well-known member
Joined
Dec 5, 2001
Messages
239
Location
Cross Roads, Texas, U.S.
Corvette
'89 dk red coupe
I removed the (2) screens from my MAF at about 55,000 miles; now have right at double that mileage and no ill effects. No driveability problems, but no great seat-of-the-pants boost either.
Remove the screens if you wish using the TPIS-recommended method: use a thin knifeblade to pry loose the small plastic rings that hold the screens in place. They're glued or otherwise bonded, so work carefully and take your time. (Try not to insert tip of knifeblade into palm of hand!)
The rings and screens will come out intact, so you can re-install them if you're ever so-inclined.
What you might NOT want to do, if you live and drive in hot areas, is further modify the MAF by cutting away the heat-sink fins. Or you could have two MAF's, a summer one with fins, and a winter one w/o fins. 'Way too much trouble, I think.

- R
 
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Shadowing1985v

Guest
hehe

yeah sounds like way to much trouble

i will build the RAM air induction
once i have that there shoudlnt' be any real need to remove the screens anyways
 
Joined
Jun 20, 2002
Messages
2,509
Location
Tallahassee, FL
Corvette
none right now :(
The screens are there for both reasons... to help stop debris (which is the lesser of the two, since the air is already filtered) and to straighten the air... On corvettes, the air is running straight already, so the screens can be cut out. On the F Body cars, the air isn't straightened, and the screens actually help the performance of the engine. I have seen the dyno tests, and taking out the screen always increases HP on Corvettes... Don't expect any miracles though, a gain of 2-4 HP should be expected, you may even manage up to 6 HP if you are lucky
 
S

Shadowing1985v

Guest
wow thanx man

that seems to make sense

i gues si will take i tout

it won't do no harm if any
 

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