: De-screening the MAF.... Yes or No?



austin
02-09-07, 11:52 AM
I have read that the 02-04 zo6 corvettes come from the factory with no screens in there MAF. If is the case.. Has anyone here actually gone and done this mod to there "V", and if so, was there any benifit from having it done. :)

heavymetals
02-09-07, 12:48 PM
No.

The maf on my Z06 is different then the V.

V-Smooth
02-09-07, 01:01 PM
I wouldn't de-screen, I'd say you wouldn't see more than 8-10% better flow. Plus if you live in dusty areas it's just more insurance. IMHO

04CTSVFLA
02-09-07, 01:12 PM
8-10% would be a shitload for a 30 second free mod.....

ctsvflorida
02-09-07, 01:26 PM
I would recommend that you listen those other guys and do not touch the screen! It will add sooooo little, if anything, and can only cause problems. I do every little trick there is to do in my garage and that would be so easy to do...yet I don't do it! My opinion fella's!

zozmanCTS-V
02-09-07, 01:26 PM
No. True, the MAF is calibrated to report airflow through it as it is stock. But, if you descreen or port it to allow more air, it won't be giving the computer the correct information. So tuning is needed. An aftermarket MAF is set up to report the airflow it's capable of. So if you want to put in a larger or ported MAF, go with aftermarket and keep your stocker with you just in case the car decides it doesn't like the aftermarket one. :thumbsup:

ctsvflorida
02-09-07, 01:36 PM
Aftermarket MAF= JUNK

Light a match to the $300+ you would spend on one and you will get more enjoyment from the fire and smoke then from buying an AM MAF! You'll also probably gain more HP from the fire as you would from most all of those MAF's which can actually be worse than stock!

The Tony Show
02-09-07, 01:38 PM
The screen helps straighten out some of the turbulence in the airflow in order for the MAF wire to get a clean reading. I'd pass on this mod.

04CTSVFLA
02-09-07, 01:45 PM
I wasnt saying whether or not it should be done....but if it does actually provide 8-10% increase in airflow.....thats alot guys on a stock motor....but if the negative aspects outweigh the pos. then obviously this is a mod not worth doing. But alot of the vettes, anf fbody guys get great results from this mod.....there is even a write up on how to do it on installuniversity.com

ctsvflorida
02-09-07, 02:10 PM
The screen helps straighten out some of the turbulence in the airflow in order for the MAF wire to get a clean reading. I'd pass on this mod.

I liked the way I wrote it a lot better! :p

Although I like your biz cards!

zozmanCTS-V
02-09-07, 02:28 PM
I wasnt saying whether or not it should be done....but if it does actually provide 8-10% increase in airflow.....thats alot guys on a stock motor....but if the negative aspects outweigh the pos. then obviously this is a mod not worth doing. But alot of the vettes, anf fbody guys get great results from this mod.....there is even a write up on how to do it on installuniversity.com

Go ahead and make the mod to your MAF. Post your evaluation here later. :yup:

starfox86
02-09-07, 02:34 PM
ummmmmmmmm am i missing something????????????? I have no MAF screen? I have the volant intake on and there isnt one. I dont remember if the Volant came with the MAF on it or not...Does anyone know? all i know is that i definately have no MAF screen..:confused:

heavymetals
02-09-07, 02:39 PM
If you want/think an aftermarket MAF will help, I'll make you one heck of a good deal on a slightly used one.

04CTSVFLA
02-09-07, 02:39 PM
maybe 06+??? ls2 no maf screen. Starfox, you sure your looking in the right place...lol

Florian
02-09-07, 03:15 PM
do NOT mess with your maf....its already tweaky as it is...unless you have EFILive or HPTuners and can diddle with your values, then its not worth the ass ache you WILL experience.


F

rand49er
02-09-07, 03:30 PM
Florian's (and others're) right.

If you want more airflow, get the TPIS adaptor and an LS2 90mm TB. But, I doubt you'll see a huge HP gain. Too many other constraints such as intake manifold, heads, and exhaust manifold, not to mention tune.

austin
02-09-07, 04:06 PM
Thanks for the feedback... :)

V-Smooth
02-09-07, 04:13 PM
8-10% more flow....remember, I use 'fuzzy' math :drink2:

1MEANV
02-09-07, 06:20 PM
i descreened every maf and never had a problem. that mesh when compacted will block alot of air flow. if you dont drive in the desert, i would do it.LOL

v-ape
02-09-07, 06:33 PM
I wouldnt do it personally, its there for a reason. Its supposed to align the airflow so you get laminar flow over the MAF sensor. If its turbulent, it wont have an accurate reading of the amount of air coming in.

I see some owners have done it and havent had any problems though. Until I see dyno numbers, I dont know...

starfox86
02-09-07, 07:00 PM
im positive i dont have one...http://img444.imageshack.us/img444/6735/mahak2.png

zozmanCTS-V
02-09-07, 10:11 PM
MAF Part number: 25318411 or 25168491 (213-364) is screened and is used on: 2001-2004 C5 Corvette (LS1 engine), 2001 Z06 Corvette (LS6 engine), 2005-2007 C6 Corvette (LS2 engine) and 2004-2006 CTS-V (LS6 engine) among others. The unscreened MAF is 25341604 (213-1150) and is used on the 2002-2004 Z06 Corvette.

austin
02-09-07, 10:25 PM
>The unscreened MAF is 25341604 (213-1150) and is used on the 2002-2004 Z06 Corvette.

I am curious to know if this is "part" of the reason why the corvette LS6 constantly dyno's higher than the cts-v LS6.

stkshkr
02-09-07, 10:55 PM
Exhaust manifolds help the Vette

zozmanCTS-V
02-09-07, 11:25 PM
>The unscreened MAF is 25341604 (213-1150) and is used on the 2002-2004 Z06 Corvette.

I am curious to know if this is "part" of the reason why the corvette LS6 constantly dyno's higher than the cts-v LS6.

Possibly. Descreened MAF along with less restrictive intake airbox lid, removal of pup-cats contribute to your observation.

The_Groundhog
02-09-07, 11:34 PM
I de-screened my Impala SS and did not notice any i'll affects, I think it helped but no calculatable proof on that. It ran without a screen with a ram air kit for a few years. At least on the Impala it wasn't a bad thing.

Thomcat
02-13-07, 03:39 AM
Took mine out and now I actually arrive before I left. Well, Maybe not Einstein fast but I believe every little bit helps. I have had no ill effects and garnered the information from an ls1/ls6 performance book. Car is Maggied, Magna'd with LPE cold air intake and that all famous screen out of the MAF modification.

Closer_2001
02-17-07, 12:27 PM
I have read that the 02-04 zo6 corvettes come from the factory with no screens in there MAF. If is the case.. Has anyone here actually gone and done this mod to there "V", and if so, was there any benifit from having it done. :)

No unless you have the MAF table for a Z06 and can flash with tuning software.

heavymetals
02-17-07, 02:07 PM
Possibly. Descreened MAF along with less restrictive intake airbox lid, removal of pup-cats contribute to your observation.

Different exhaust & rear end ratios also.