descreened my stock maf?
Thread Starter
Registered User
Joined: Oct 2003
Posts: 187
From: ill
descreened my stock maf?
I would like to here your thoughts on descreening a stock maf? what are the pro's & cons . and should iI do it atfer I had my car performance tuned? Is it as simple as cutting out the srceen?
you can see what I've done to my car in my sig.
thanks
tony
you can see what I've done to my car in my sig.
thanks
tony
Administrator
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
The screen is there to insure the air flow is uniformly distributed over the open area of the sensor, to provide for calibration over a wide range of flows, from idle through WOT.
In the early models, you can remove the screen by simply prying a thin spring ring out from behind it. That way, if you remove it, and don't like the results, you can put it back in. Not sure if the screen can be removed this way in a 97.
I've seen removal cause a loss of fuel economy or up to 2.5MPG, or to cause a slightly rough idle. Other people see nothing. Some people see near-miraculous SOTP increases in "throttle response". I seriously doubt the screen offers that much resistance to flow in a moderately modified engine.
In the early models, you can remove the screen by simply prying a thin spring ring out from behind it. That way, if you remove it, and don't like the results, you can put it back in. Not sure if the screen can be removed this way in a 97.
I've seen removal cause a loss of fuel economy or up to 2.5MPG, or to cause a slightly rough idle. Other people see nothing. Some people see near-miraculous SOTP increases in "throttle response". I seriously doubt the screen offers that much resistance to flow in a moderately modified engine.
Thread Starter
Registered User
Joined: Oct 2003
Posts: 187
From: ill
Originally posted by Injuneer
The screen is there to insure the air flow is uniformly distributed over the open area of the sensor, to provide for calibration over a wide range of flows, from idle through WOT.
In the early models, you can remove the screen by simply prying a thin spring ring out from behind it. That way, if you remove it, and don't like the results, you can put it back in. Not sure if the screen can be removed this way in a 97.
I've seen removal cause a loss of fuel economy or up to 2.5MPG, or to cause a slightly rough idle. Other people see nothing. Some people see near-miraculous SOTP increases in "throttle response". I seriously doubt the screen offers that much resistance to flow in a moderately modified engine.
The screen is there to insure the air flow is uniformly distributed over the open area of the sensor, to provide for calibration over a wide range of flows, from idle through WOT.
In the early models, you can remove the screen by simply prying a thin spring ring out from behind it. That way, if you remove it, and don't like the results, you can put it back in. Not sure if the screen can be removed this way in a 97.
I've seen removal cause a loss of fuel economy or up to 2.5MPG, or to cause a slightly rough idle. Other people see nothing. Some people see near-miraculous SOTP increases in "throttle response". I seriously doubt the screen offers that much resistance to flow in a moderately modified engine.
thanks fred, I'll leave it alone.
i've seen that alot of people value your
opinion & knowledge...........
tony
Registered User
Joined: Apr 2003
Posts: 98
From: Oak Harbor, Washington
I descreened mine and no ill effects have come from it, my MPG isn't what it should be, but it was like that before the MAF descreening. I didn't notice a SOTP gain, but throttle response was a little quicker and my engine got a little louder at WOT. Mine didn't set any codes or anything though.
Registered User
Joined: Oct 2001
Posts: 6,070
From: newton, kansas, USA
i descreened and ported my maf when i first got my car and wanted to do some mods to it. After i got a scanmaster i saw it messed my BLM's all up so i now have a stock, screened MAF back in my car.
Registered User
Joined: Aug 2000
Posts: 4,305
From: North Vancouver, BC
No kidding, at most you can try descreening it & you might gain a bit of HP at WOT & like 6k rpm, but for everyday driving you'll loose mid range power/fuel economy, & with a big cam I notice the cam surge is minimal with a screen.
Leave it.
BTW, I think 96+ is when the screeen is epoxied in, before that it was just a c-clip.
Leave it.
BTW, I think 96+ is when the screeen is epoxied in, before that it was just a c-clip.
Registered User
Joined: Mar 2002
Posts: 3,245
From: Ocala, Florida
Run 1 with stock screened MAF 275.8rwhp
run 2 descrened 278.9rwhp
run 3 descreened, 277.1 RWHP
Right now I'm makin 302.9rwhp and the a/f is dead on with my tuning, so I see no side effects of descrening it, I gained 3rwhp by descrening it.
run 2 descrened 278.9rwhp
run 3 descreened, 277.1 RWHP
Right now I'm makin 302.9rwhp and the a/f is dead on with my tuning, so I see no side effects of descrening it, I gained 3rwhp by descrening it.