JohnnyBs98WS6Rag

iTrader: (1)

Me thinks your filter wasn't doing its job. Was your lid clamped on properly? Sometimes the metal buckle pops back up and doesn't hold the lid down properly. I had to "massage" the curvature in my buckle so that it stayed down properly when snapped. Also check your bellows to be sure it doesn't have a big hole in it and it is properly clamped to the MAF and lid. A properly installed filter would never let that crap through.

HoLLo

iTrader: (17)

I don't like descreening the MAF due to a poorer signal that the MAF receives. I, however, put in a different screen. The honeycomb "tunnels" are a bit longer, for more opportunity to straighten out the air, and allowing more airflow. Look at the mounting depth inside the MAF and the size of the honeycombs. $10 screen

ANTICOP RAM AIR

iTrader: (7)

when I first got my TA, I went to do a factory lid swap and full tune up. When I removed the factory lid assy, I found parts of a bird... a curled up leg/foot with bone, two big *** feathers and some other ****... filter was in place which made it even more odd.... MAF had a screen up until then... after the Whisper lid, smooth bellow and some B12, it was a totally different car...

citationls

I don't really see what people are debating here. If you descreen the MAF then there is nothing to catch stuff that sneaks through the air filter. Anything that would've gotten caught in the screen just passes through and goes into your engine if the screen isn't there. Your car isn't gonna blow up because a pebble gets in the engine so how would you notice the difference? My argument is that you can't prove that descreening the MAF is ok for the engine cause how do you prove if something slips through? Doesn't seem like descreening is worth it to me.

the impaler

I de-screened my MAF in 1999 and have had no problems.
I also noticed no performance gains. My quarter mile times were the same, didn't feel different either.

omarrakeen

iTrader: (2)

00_trans your have serious fitment issues. the only way dirt get to maf is from unsealed lid on lower box other that that everything should get filtered. but i would never descrean my maf because 99% of lids leak better safe than sorry or should i say better than 0.01 hp?

99Z28camaroman

iTrader: (10)

My 99 Z28 had a Z06 85mm Maf with a pigtail connector and no screen it ran great with no problems.

I would say there is no real performance advantage felt after running a descreened MAF

baalic

iTrader: (8)

I think it was motly due to the lid obviously..

Aggie_Ls1

Im digging up this thread to share some personal experience with this issue. I recently made 392whp after my cam install and tune. After some pulls, my tuner said the motor was getting choked up top, so he suggested throwing in a K&N and descreening the MAF. So about 15 min later, it was rolling again, and it made 398. He said it was then leaning out due to the increased airflow, so he added some more fuel and it made 400whp.

In all the times I checked and cleaned my MAF, it was clear of debris. Just make sure you have a good seal around the lid and a good filter, and you should be fine. If you're worried about straightening airflow or whatever, then that's your opinion. Just wanted to share.

So, in my case (full bolton +cam), a K&N and descreened MAF was worth 8 rwhp.