To descreen or not. - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 09-05-2006, 02:53 PM   #1
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jul 2005
Location: Lancaster, South Carolina
Posts: 233
Thanks: 0
Thanked 0 Times in 0 Posts
spidey3479 is on a distinguished road
Default To descreen or not.

I keep seeing a mod mentioned on different years here called descreened MAF. I know what this is,but my question is,"Does it work better for certain body styles or setups? Is there a downside? And if I do this do I need to change any other sensors or anything?"
spidey3479 is offline   Reply With Quote
Old 09-05-2006, 02:57 PM   #2
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

It typically works best only if you build a custom CAI that provides very good non-turbulent laminar flow.

No accordian tube, smooth-wall pipe with a good cone filter. And even with that, results vary. I'd suggest keeping the screen with a stock airbox setup, even if you put in a drop-in K&N replacement filter.

The screen provides a good laminar flow across the MAF sensor so it can get an accurate reading of the incoming air volume in order to adjust the AF mixture.

If it doesn't get an accurate reading because of turbulence, it'll be reading less air than there actually is, and it will lean your mixture out, causing it and the O2 sensor to argue constantly.

The effect will be more intense as the barometric pressure and ambient air temps rise and fall.
willwren is offline   Reply With Quote
Old 09-05-2006, 03:17 PM   #3
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jul 2005
Location: Lancaster, South Carolina
Posts: 233
Thanks: 0
Thanked 0 Times in 0 Posts
spidey3479 is on a distinguished road
Default

I do have a chrome intake that I will be heat shielding and insulating. Does that qualify for descreening?
spidey3479 is offline   Reply With Quote
Old 09-05-2006, 03:26 PM   #4
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

It may. You have to keep an eye on your long and short-term fuel trims to know for sure. Again, it works for some, not all, but your odds are better with a good laminar, smoothwalled intake and cone filter. But it'* no gaurantee it will work for you.

Bear in mind that it COULD run you lean. That'* bad news for valves and such, and VERY dangerous with Forced Induction of any kind (turbo, sc, NOS, etc).
willwren is offline   Reply With Quote
Old 09-05-2006, 03:31 PM   #5
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jul 2005
Location: Lancaster, South Carolina
Posts: 233
Thanks: 0
Thanked 0 Times in 0 Posts
spidey3479 is on a distinguished road
Default

Ah yes, the NOS. Still plan on doing that so I guess I had better try this now and see what effect it has, so when I get the system I'll know what to expect.
spidey3479 is offline   Reply With Quote
Old 09-05-2006, 03:48 PM   #6
Member
Posts like a V-Tak
 
Join Date: May 2006
Posts: 81
Thanks: 0
Thanked 0 Times in 0 Posts
Regal_Kid_05 is on a distinguished road
Default

Is there a way to check and see how your car acts towards the Screened MAF vs. the De-screened?
Regal_Kid_05 is offline   Reply With Quote
Old 09-05-2006, 03:58 PM   #7
Senior Member
Certified Car Nut
 
Join Date: Jul 2003
Location: Robbinsdale, MN
Posts: 15,408
Thanks: 0
Thanked 0 Times in 0 Posts
MOS95B is on a distinguished road
Default

All you can do is try it. It works great for some (me - with gutted airbox, stock tube, and FRAM Air Hog filter). Others have problems with an uneven idle.

The screen is easy enough to pop in and out.
MOS95B is offline   Reply With Quote
Old 09-05-2006, 04:15 PM   #8
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jul 2005
Location: Lancaster, South Carolina
Posts: 233
Thanks: 0
Thanked 0 Times in 0 Posts
spidey3479 is on a distinguished road
Default

At the very least I will clean mine after I see what it does for me. Is there anything other than carb cleaner that i can also clean the plenum with? Sorry if that is off topic, but I just thought of it since I started this thread.
spidey3479 is offline   Reply With Quote
Old 09-05-2006, 04:29 PM   #9
Senior Member
Certified Car Nut
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

If you are gonna use carb cleaner, you must first remove all the electronics from your TB. Carb cleaner will kill a MAF sensor.
J Wikoff is offline   Reply With Quote
Old 09-05-2006, 04:34 PM   #10
Senior Member
True Car Nut
 
Join Date: Jan 2006
Location: NEBF:06,07 | NYBF:06,07 | ONBF:06,07 | CNBF:06 & more............
Posts: 8,029
Thanks: 0
Thanked 0 Times in 0 Posts
bandit is on a distinguished road
Default

Quote:
Originally Posted by J Wikoff
Carb cleaner will kill a MAF sensor.
its will? :(

Cuz i took mine at and spryed it a little just one time... i dont think i hurt it, unless may thats what cousing my other little problem...
bandit is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
2nd gear is not right (NOT FIXED, NEED GEARHEADS, LOT O PICS harofreak00 General GM Chat 57 03-29-2005 12:34 AM
not good. NOT GOOD. (hit and run, not bad-BAD, but not good) repinS General GM Chat 13 11-26-2004 11:35 AM
Not a Bonnie,not a Pontiac............. dbeast420 Lounge 3 10-17-2004 12:47 PM
OMG this confuses me so much GRR not battery not alternator? killer_cr80r Lounge 5 08-27-2004 10:23 AM
HEADLIGHTS LEGAL OR NOT WORK GOOD OR NOT LOOK PLZ........... killer_cr80r Lounge 8 05-19-2004 01:45 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 09:30 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.