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Old 08-12-2002, 19:31   #1 (permalink)
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Mass Air Flow Meter Improvments

The other night at a friends house i was reading one of his rice boy books with an article on air flow meters.
A long with other things it said that by removing the little mesh grid that sits in front of the MAFM it could give some sort of gains?!
Obvisouly this grid is put there for a reason.. will removing it give any gains at all? ( i imagine they would be close 2 fuk all )
Or will it just let matter into the intake which shouldnt be there?
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Old 08-12-2002, 19:45   #2 (permalink)
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I read an article at autospeed a while ago about this...the mesh is there to stop any stones/dust/ther bad stuff from hitting the hot wire.

The mesh makes the air a fair bit more turbulent, so if it is not there the airflow will be smoother thereofre more air can get through, but for the actual gains i dont know, and i dont know if it is worth the risk to the MAF.
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Old 08-12-2002, 21:23   #3 (permalink)
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I have taken mine out and gone for a small drive. It seems to be a little better low down but not really anything to get excited about.
I imagine the filter will stop all stones from hitting the hot wire, but dust and mayb filter oil could build up on it.
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Old 08-13-2002, 03:48   #4 (permalink)
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I believe a lot of the LS1 types remove the screen ...
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Old 08-13-2002, 05:02   #5 (permalink)
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I can only really think of one reason. I dont think it's for blocking out dust or whatever, thats why the air filter is there in the first place, and they wouldn't be thinking of people putting K&N's in so it aint for the dust either.

How big is the opening air box??? Around 70 odd mm??? How big is the hole in the MAF?? About 55 odd mm... Now the mesh is restricting air getting through by a bit over half. XR8XTC was it noiser when you drove it?? I imagine the mesh would quieten induction a bit as it restricts the air...

Then again i could just be spinning BS...
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Old 08-13-2002, 17:34   #6 (permalink)
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I have a cold air/ram feed from my air box to the front of the car so i can hear no induction noise when driving so i couldnt say if induction noise has increased.
After a few more drives i would say that taking out this mesh does make a minor difference, i tend to notice more from 2000 to 3500. I have decided to leave it out for now and i will check the hot wire in about two weeks to see if it has any build up on it.
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Old 08-13-2002, 18:20   #7 (permalink)
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i dont think it will make a difference - contrary to popular belief, the mesh is there to smooth airflow, and it does.

i think any benifit is a percived on, though i am not willing to get into an arguement about it, as i have never done a before/after test drive.

a VX SS came in to work the other day, and the owner had removed the mesh and ported the throttle body a little, the car was running like crap because the airflow meter was giving a different signal to what the computer was expecting.

i wouldnt bother.
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Old 08-13-2002, 19:18   #8 (permalink)
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Quote:
Originally posted by Rollin
i dont think it will make a difference - contrary to popular belief, the mesh is there to smooth airflow, and it does.

i think any benifit is a percived on, though i am not willing to get into an arguement about it, as i have never done a before/after test drive.

a VX SS came in to work the other day, and the owner had removed the mesh and ported the throttle body a little, the car was running like crap because the airflow meter was giving a different signal to what the computer was expecting.

i wouldnt bother.
It was running ruff from the mesh being removed?
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Old 08-13-2002, 20:37   #9 (permalink)
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probably as a result of having the mesh removed and also being ported.

hot wire air flow meters work as follows:

the computer runs x amout of current/voltage through a special resistor, which changes resistance as it changes temp.

air mass is directly related to its temperature and humidity, so as it flows past the heated wire it cools it , in proportion to the airs heat and humidity. the computer is told if x voltage exists across the wire then x amount of air is flowing through due to the size of the throttle body, and to add x amount of fuel. if you bore out the throttle body or change it in any way then the computer may get confused, as this one did.
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Old 08-14-2002, 04:16   #10 (permalink)
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the mesh is there to direct the air flow over the hot wire/hence taking it out only causes problems
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