View Poll Results: DESCREEN FOR DRY SHOT???
Take it out.
44
80.00%
Leave it in.
11
20.00%
Voters: 55. You may not vote on this poll
Descreen for dry shot?
05-19-2006, 04:35 AM
#1
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Descreen for dry shot? I've read a lot of opinions, but it seems like no one has a straight answer for this. Do you need to descreen when running a dry shot? Does it make any difference at all if it's an A4 or M6?
05-19-2006, 09:12 AM
#5
That is one of those mods that is just personal preference.
I have been told by several very respectable tuners not to mess with the stock MAF at all. Not to descreen either. The screen is there for a reason, to stop debris from goin into your motor through the TB. I know several people will pop up & swear they have never had a problem, but I'm not willing to chance a motor for a mod with no gains worth a possible future rebuild.
I have been told by several very respectable tuners not to mess with the stock MAF at all. Not to descreen either. The screen is there for a reason, to stop debris from goin into your motor through the TB. I know several people will pop up & swear they have never had a problem, but I'm not willing to chance a motor for a mod with no gains worth a possible future rebuild.
05-19-2006, 09:43 AM
#6
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Originally Posted by BIG_MIKE2005
The screen is there for a reason, to stop debris from goin into your motor through the TB.
05-19-2006, 10:41 AM
#7
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If your nozzle is going to be anywhere near the MAF then it will absolutely form ice on the screen and block the flow.
If you spray far away from the screen then you may not have that problem.
If you spray far away from the screen then you may not have that problem.
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05-19-2006, 10:47 AM
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GM's justification for the screen is to straighten airflow out from the airbox to the intake, not debris. Vettes stopped using the screen, and most ppl followed. Rumor mill about !screened MAF messing with A4 trans pressures is half truths. The MAF if not calibrated can skew airflow report, and thus mess with the dependent components like the A4 trans. I !screened mine and never had an issue. I do believe that some ppl have more problems with oil from filter charge and cleaning then they do from the actual removal of the screen, but they blame the screen. So good note, if you remove the screen make sure to use very light coat, if any, oil on your filter if you run a oiled filter. If it starts running shitty after descreening, check the wires to make sure they are clean and free of oil. I use alcohol on a q-tip and gently wipe the wires and crossbars for each set of resistors.
05-19-2006, 08:16 PM
#10
Just take a screen and compress it in a vice and you'll see how much of a restriction it really is. If your tune is on the lean side, you might throw a code but this usually goes away after resetting and some miles. On the Z06 in '02 the GM engineers went on a mission to get more HP from the ls6, what they found after new air box, cam and some other mods, was the fact that the screen was a restriction. So they removed it and tuned around it, and stated that it really wasn't needed anyhow. They went on to say that the screen really was for straighting airflow when you have a 90* turn in your intake tract (trucks) which causes turbulence. It's the same thing that happens when adding a CAI like the Vararam, sometimes lean codes will appear and you'll see your LTFT's going positive which means adding fuel. Take the restriction out and retune for it if needed. On dry shots yes, the standard is to remove screen because of the chance of icing. I have removed screens on auto's and manuals with no codes or problems, except LTFT adding fuel which indicates better flow.
Robert
Robert
