MAF Sensor screen removal on '85 C4
Thread Starter
Burning Brakes
Joined: Jul 2003
Posts: 922
Likes: 1
From: Brisbane Queensland, Australia
Re: MAF Sensor screen removal on '85 C4 (ld85)
On my 85 I took out both screens and the heat sinks, as a result of the TPIS claims.
my HP went form 230HP up to @ 400HP,,,,, or,,,,,, maybe that was the new 406 engine that gave me the increase:D
my HP went form 230HP up to @ 400HP,,,,, or,,,,,, maybe that was the new 406 engine that gave me the increase:D
:lolg:
Le Mans Master
Joined: Jul 2001
Posts: 5,297
Likes: 0
From: Stamford VT
Re: MAF Sensor screen removal on '85 C4 (smacko)
Keep in mind that the 85 MAF has different construction than the 86-89 style. Removing the screens isn't as easy as just popping them out like on the newer ones. The metal screens are sandwiched right into the plastic, so you've got to cut them out, then use a file to smooth all of the burrs and left-over pieces that you're guaranteed to cut yourself on 20 times. I did it on my 85 MAF and it worked fine for a while, then started chucking Code 34s here and there. Dunno if it's time was just up or if cutting the screens out caused an early death, but since I didn't feel a damn bit of difference, I wouldn't do it again.
Thread Starter
Burning Brakes
Joined: Jul 2003
Posts: 922
Likes: 1
From: Brisbane Queensland, Australia
Re: MAF Sensor screen removal on '85 C4 (Jim85IROC)
I did my rear screen yesterday. Was dead easy to do with pliers and the strands just rolled over them and pulled out; no frayed edges or anything.
I doubt just removing the rear (Which is all I'm going to do) would cause anything premature unless tiny bugs have learnt to fly backwards out of the TB...MAYBE the rear screens' there as a spark arrestor (THERE's an interesting new thread!) :bs
I doubt just removing the rear (Which is all I'm going to do) would cause anything premature unless tiny bugs have learnt to fly backwards out of the TB...MAYBE the rear screens' there as a spark arrestor (THERE's an interesting new thread!) :bs
Racer
Joined: Sep 2000
Posts: 294
Likes: 0
From: Princeton Texas
Re: MAF Sensor screen removal on '85 C4 (smacko)
Found this over in 3rd gen.
http://www.gmtips.com/3rd-degree/dox...maf-screen.htm
worth reading if you are considering removing the screens.
fp
http://www.gmtips.com/3rd-degree/dox...maf-screen.htm
worth reading if you are considering removing the screens.
fp
Thread Starter
Burning Brakes
Joined: Jul 2003
Posts: 922
Likes: 1
From: Brisbane Queensland, Australia
Re: MAF Sensor screen removal on '85 C4 (fiddleplayer)
Thanks for that! Although it's now hindsight 'cause I removed the rear screen ONLY before I read this; it PROBABLY would have scared me off doing it tho...My last post re spark arrestor may not be that far off track by what I just read.
Interesting site he has; I like the TB bypass idea of his; air cooling it!
Sounds like something I would have done once (And now prob WILL do); but why not run the hose down to a 12v fridge and have icy air flowing thru TB? hehe Hey, I guess some great ideas are born of stupid comments!
Personally; My sense of logic is sometimes delayed!
:smash:
Interesting site he has; I like the TB bypass idea of his; air cooling it!
Sounds like something I would have done once (And now prob WILL do); but why not run the hose down to a 12v fridge and have icy air flowing thru TB? hehe Hey, I guess some great ideas are born of stupid comments!
Personally; My sense of logic is sometimes delayed!
:smash:
Le Mans Master
Joined: Oct 2001
Posts: 5,302
Likes: 2
From: Atlanta GA
Re: MAF Sensor screen removal on '85 C4 (smacko)
I cut my screens out and the two longest fins (was impatient, didn't want to "waste time" cutting out the others) on my remanufactured unit, but that was before I ever drove it w/ the new engine in. So, I really can't tell you if there was a difference or not. :thumbs:
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Re: MAF Sensor screen removal on '85 C4 (fiddleplayer)
Found this over in 3rd gen.
http://www.gmtips.com/3rd-degree/dox...maf-screen.htm
worth reading if you are considering removing the screens.
fp
http://www.gmtips.com/3rd-degree/dox...maf-screen.htm
worth reading if you are considering removing the screens.
fp
Well, that's a nice little webpage, but that doesn't mean it's true. The author's explanation of maximum flow and restrictions is WRONG, for lack of a better term.
Maybe I just think i'm a wise guy cuz I have a degree, but don't be so easily impressed by his fancy-pants verbage. He bashes the MAF de-screeners for not backing up their claims, yet he doesn't back up all his claims about unsteady flow and turbulence and unmetered airflow. It's all heresay.
The MAF screens are a significant restriction to airflow. It doesn't matter what TB you have. Stand in front of your screen door on a windy day... then open it, and you'll feel the difference.
Air is slippery, stationary steel mesh is NOT.
FWIW, I removed the rear MAF screen. Can I feel the difference? No.
LOL, his only reasoning for keeping the rear screen is to protect the MAF element in the case of a backfire. Yeah... sure..... I tell you what. I'll stick a 1/4 stick of dynamite in a trash can, and you put a thin steel mesh over the top of it, stick your face right over it, and watch it explode.
[Modified by CentralCoaster, 1:26 AM 8/30/2003]
Pro
Joined: Jun 2003
Posts: 559
Likes: 6
From: OKC OK
Re: MAF Sensor screen removal on '85 C4 (fiddleplayer)
I read that page...seems more "preachy" than informative...
I have removed the screens from bosch unit in my 85. Could I feel the difference?
YES! As I posted previously I was able to turn the engine to only 4800 rpm with the screens intact. After removing them I can turn the engine to 5500rpm and maybe more but that's as far as I have taken it. :seeya
I have removed the screens from bosch unit in my 85. Could I feel the difference?
YES! As I posted previously I was able to turn the engine to only 4800 rpm with the screens intact. After removing them I can turn the engine to 5500rpm and maybe more but that's as far as I have taken it. :seeya
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Racer
Joined: Aug 2002
Posts: 386
Likes: 0
From: Lancaster Lancashire
Re: MAF Sensor screen removal on '85 C4 (CentralCoaster)
LOL, his only reasoning for keeping the rear screen is to protect the MAF element in the case of a backfire. Yeah... sure..... I tell you what. I'll stick a 1/4 stick of dynamite in a trash can, and you put a thin steel mesh over the top of it, stick your face right over it, and watch it explode.
[Modified by CentralCoaster, 1:26 AM 8/30/2003]
[Modified by CentralCoaster, 1:26 AM 8/30/2003]
[Modified by Davemc1963-87conv, 8:04 PM 8/30/2003]
