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i just bought a 90 sc and noticed that it has a screen in its maf where all the after market ones i see do not . should i remove this screen ? better air flow or not ? thanks
 

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i have a 70mm maf that is bigger and no screen in the bigger ones ! also have new bbk throttle body to go with it ! i can make you a deal on both of them, I just upgraded to magnum powers blower, intake, and 85mm throttle body
 

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70 mm bbk for super coupe, also stock manifold if your looking for one to port, and stock blower top, and 70mm maf that has not been cut up !stock inlet pipe and air box with k&n pannel filter bbk is new and every thing else is in perfect condition ! i just bought magnum powers compleat magna port II set up. If you put on a 75mm you will have to port the manifold for it to work properly !!!!!!!! because the manifold is only about 65mm that is why i went with magnum powers complete system, other wise your spinning your wheels with bigger T/B than a 70mm. with the magnum powers set up you will be smoking your wheels !!!!!!
 

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Trust me, I smoke the wheels very nicely through second already.

How much for the throttle body?
 

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how did you get it off?

How did you get the MAF screen off? Just curious since it will give me something to do to my car this weekend.
-Rob
 

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Leave it in. Modifying ANY MAF is bad. It changes the transfer function, and will usually make you run lean. Unless you can post dyno graphs with o2 sensor readings to show that a MAF mod (including taking out the screen) does not effect it's transfer function, DON'T DO IT.
 

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This time...

I agree with Greenbird. Leave the screen in, as taking it redirects the airflow across the MAF hotwires and that can skew the transfer function.

A-Train
 

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Sorry, that piece of mesh does not redirect air flow across the wires. That is BS. Reason number one I know this isn't true is that if this were the case then the screen would have to be indexed to a certain position. This obviously isn't the case.

John
 

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OK captain...

Dode,

Your understanding of fluid dynamics amazes me. Also, Ford chose Firestone tires for the Explorer's since they were the cheapest bidder. So why would they spend extra money installing a screen on a small MAF if it wasn't needed?

I'll tell you why. The hotwires aren't even directly in the airflow path on the small 58mm MAF. The screen is used to turn the turbulent air into straight air.


A-Train
 
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