honeycomb on front of MAF???
Feb 5, 2012, 08:08 AM
#31
Intake air flow reacting against a vortex generator (honeycombe mesh) creates a swirling effect to the air downstream, this flutter or wake is refered to as Karman Vortex, hence the name given to the type of MAF used. The frequencies of the vortices very in proportion to the intake air velocity.
The vortices are then metered against a metal foil mirror, the airflow against the mirror causes it to oscillate in proportion to the vortex frequency.
So just to correct a couple of things, the mesh is not there to straighten air flow but to create vorticies and is an integeral part of the MAF calibration.
Yes you can run without it, but hopefully from the above description you can see why when it's removed you see changes to how you car runs.
The vortices are then metered against a metal foil mirror, the airflow against the mirror causes it to oscillate in proportion to the vortex frequency.
So just to correct a couple of things, the mesh is not there to straighten air flow but to create vorticies and is an integeral part of the MAF calibration.
Yes you can run without it, but hopefully from the above description you can see why when it's removed you see changes to how you car runs.
Feb 5, 2012, 10:30 AM
#32
the screen might be just something for safety to protect the maf. i cant really find any details on the screens functionality with a quick google search.. but what you said above is definitely right based on what i just read.
Mar 5, 2012, 01:02 PM
#33
Evolving Member
Thread Starter
iTrader: (2)
Join Date: Nov 2007
Location: Oceanside, CA
Posts: 101
Likes: 0
Received 0 Likes
on
0 Posts
Back after starting this post I found this big long page all about how the air travels through all the different parts of the maf, like the honeycomb part and what not. Although that bar in front of the sensor does create a vortex there was alot talking about how the honeycomb does significantly affect the air, and everything that I read about matched to a T what my car was doing. I tryed running with it out and it was undrivable. Car couldnt even hold an idle. I was all over the place and then sometime it would die. after sitting on the couch for a hour or so getting every fin back to perfect, I put it back in and all those problem were solved, I havent had an issue since. (Maf also got a good cleaning on reinstal which it needed)
Mar 5, 2012, 01:49 PM
#34
I think the issue is that without the honeycomb, the air density may fluctuate too much at idle speed airflow rates, and this results in widely varying vortex generation rates. Interesting that many people have been able to run without, but your setup didn't like it. I wonder what's different.
Mar 5, 2012, 03:29 PM
#35
Rather than using a small screwdriver, find the right size hex key that just barely fits in undamaged hex cells then use that to properly straighten and fix all 6 sides of the damaged hex cells. that is the correct way to do it. It will give much more uniform hex cells as opposed to trying a small screwdriver.
Thread
Thread Starter
Forum
Replies
Last Post
blknblubkrdude
Evo Engine / Turbo / Drivetrain
18
Feb 5, 2012 11:38 AM
dannyz
Evo X Engine / Turbo / Drivetrain
12
May 12, 2009 03:35 AM
