Dont shoot the newb! MAF screen question......
#1
Dont shoot the newb! MAF screen question......
Ok, I'm in the process of doing all the "free mods" to my 98 z. One of the mods that was mentioned to me, was removing the thick screen from the MAF sensor. It does appear to be fairly restrictive.
Now, let me clarify a few things before I ask my question! I'm not asking if this in fact adds horsepower, or to see proof. Let's be realistic, the difference in power from any free mod isn't going to be drastic. I know this.
When I posted that I was going to remove it, I got told not to! Now, after some research, I notice some say to do it, and some say not to do it. Please keep in mind, this car is not my daily driver, its my weekend cruiser.
So, my question is, what is ur view on this mod? Why do some say to remove it, others say not to?
Please tell me ur view on it, and why.
Thanks,
Dale
Now, let me clarify a few things before I ask my question! I'm not asking if this in fact adds horsepower, or to see proof. Let's be realistic, the difference in power from any free mod isn't going to be drastic. I know this.
When I posted that I was going to remove it, I got told not to! Now, after some research, I notice some say to do it, and some say not to do it. Please keep in mind, this car is not my daily driver, its my weekend cruiser.
So, my question is, what is ur view on this mod? Why do some say to remove it, others say not to?
Please tell me ur view on it, and why.
Thanks,
Dale
#3
It will run better with it in. The purpose of it is to reduce turbulence before it passes over the sensors. Do not do it. There is no benefit. As you said yourself you won't be able to notice anything so why do it anyways? Wasting time and effort on nothing.
Evidence of the screen serving its purpose. http://www.hptuners.com/forum/showthread.php?t=26546
Evidence of the screen serving its purpose. http://www.hptuners.com/forum/showthread.php?t=26546
#4
Joined: Nov 2001
Posts: 32,396
Likes: 1,818
From: Schiller Park, IL Member: #317
#5
I took my screen out and its fine. Just run a regular air filter not a K&N because the paper type filter silicon and other contaminants better. The corvettes don't have a screen and i heard replacement MAFs don't have one either so I don't know why people advise against it. My screen had a few bugs stuck to it but i bought the car with 90,000 miles so i expect it. Make sure your air intake is sealed good and the only place for the engine to breath is through your filter.
#6
I'll descreen the MAF the day I grind down my o2 sensors so that the exhaust flows better. I don't see a reason to mess with it, if you really want to eliminate the "restriction" replace the whole MAF with a straight piece of pipe and tune the car in speed density.
#7
I'll descreen the MAF the day I grind down my o2 sensors so that the exhaust flows better. I don't see a reason to mess with it, if you really want to eliminate the "restriction" replace the whole MAF with a straight piece of pipe and tune the car in speed density.
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#8
It will run better with it in. The purpose of it is to reduce turbulence before it passes over the sensors. Do not do it. There is no benefit. As you said yourself you won't be able to notice anything so why do it anyways? Wasting time and effort on nothing.
Evidence of the screen serving its purpose. http://www.hptuners.com/forum/showthread.php?t=26546
Evidence of the screen serving its purpose. http://www.hptuners.com/forum/showthread.php?t=26546
#9
Whoa! Flash back to my testing video in 2009, haha...
http://www.streetfire.net/video/ls1-...ing_643805.htm
http://www.streetfire.net/video/ls1-...ing_643805.htm
#10
You said yourself, removing it won't add any noticeable power, and it could cause some problems. You can drive the car 5 times a year and run into the problem where debris somehow goes through your filter and goes straight into your intake, and the screen isn't there to catch it.
Also, I'm pretty sure I heard that the screen is there to help swivel the air around, which sends it into the intake faster. Just leave it on. If you want to mess with the intake or MAF stuff, just get a ported and polished throttle body, that's about 3-5 ACTUAL HP right there.
Also, I'm pretty sure I heard that the screen is there to help swivel the air around, which sends it into the intake faster. Just leave it on. If you want to mess with the intake or MAF stuff, just get a ported and polished throttle body, that's about 3-5 ACTUAL HP right there.
#11
You said yourself, removing it won't add any noticeable power, and it could cause some problems. You can drive the car 5 times a year and run into the problem where debris somehow goes through your filter and goes straight into your intake, and the screen isn't there to catch it.
Also, I'm pretty sure I heard that the screen is there to help swivel the air around, which sends it into the intake faster. Just leave it on. If you want to mess with the intake or MAF stuff, just get a ported and polished throttle body, that's about 3-5 ACTUAL HP right there.
Also, I'm pretty sure I heard that the screen is there to help swivel the air around, which sends it into the intake faster. Just leave it on. If you want to mess with the intake or MAF stuff, just get a ported and polished throttle body, that's about 3-5 ACTUAL HP right there.
The screen just creates more turbulence and causes a pressure drop and restricts airflow. Now does it take away gobs of horsepower? No. Will you notice it? Probably not. Does it hurt? Absolutely not. I can get all scientific but it won't cause any issues. I daily drove my car without a screen or a tune after a header install and from all the bullshit i see on ls1tech you think my motor would've blown up. Descreening it will NOT give you idle issues and will only help provide a decreased pressure differential between ambient (outside air pressure/barometric pressure) and your intake. (more power)
#12
Joined: Nov 2001
Posts: 32,396
Likes: 1,818
From: Schiller Park, IL Member: #317
Actually the screen is there to reduce turbulence and smooth/direct the airflow. Removing it has the opposite effect.
Those of us that have been around these cars since the early days ('98-'99) will recall a few examples of people seeing some slight idle oddities with a descreened MAF. A big deal? Nope. But it was there for some. I never tried it myself for that very reason, and the fact that I've never seen anyone gain anything from removing it - so why bother?
I did try some aftermarket MAF ends once, about 10 years ago when that was a popular thing to do. I put them on a A4 car and noticed some negative difference in shift feel (I was not the only one to notice such things) as MAF readings are one of several sensor inputs used in calculation of certain auto trans operations (I believe the issue here was line pressure calculations). I noticed no improvement of any kind, so I put the stock ends back on and everything was normal again.
I don't bother messing with stock MAFs any longer. They work just fine as issued by the factory. If you need more airflow for a high HP application, go with a larger MAF that is calibrated for it's size and then tune accordingly.
Those of us that have been around these cars since the early days ('98-'99) will recall a few examples of people seeing some slight idle oddities with a descreened MAF. A big deal? Nope. But it was there for some. I never tried it myself for that very reason, and the fact that I've never seen anyone gain anything from removing it - so why bother?
I did try some aftermarket MAF ends once, about 10 years ago when that was a popular thing to do. I put them on a A4 car and noticed some negative difference in shift feel (I was not the only one to notice such things) as MAF readings are one of several sensor inputs used in calculation of certain auto trans operations (I believe the issue here was line pressure calculations). I noticed no improvement of any kind, so I put the stock ends back on and everything was normal again.
I don't bother messing with stock MAFs any longer. They work just fine as issued by the factory. If you need more airflow for a high HP application, go with a larger MAF that is calibrated for it's size and then tune accordingly.
#13
There is no proof of it reducing turbulence. It is a restriction of airflow. The Ducting is what directs airflow. There are different types of ducts to do different things (increase velocity/pressure). If screens reduce turbulence and direct airflow then you would see one in front of every turbine engine and on the top of every carb.
#14
There is no proof of it reducing turbulence. It is a restriction of airflow. The Ducting is what directs airflow. There are different types of ducts to do different things (increase velocity/pressure). If screens reduce turbulence and direct airflow then you would see one in front of every turbine engine and on the top of every carb.
http://www.hptuners.com/forum/showthread.php?t=26546
#15
The "screen" works by creating local turbulence in each
of the little channels. The square-law (or higher order)
drag is what evens out the airflow. The pressure drop is
substantial. Unlike most of the people offering opinions
I have gone as far as measuring it, and found it to be
nearly the same pressure-drop as a stock lid+silencer.
People pay good money to fix -that- loss.
I've been running a descreened 85mm Delphi for a very
long time now, and it's needed no real tuning; the stock
Z06 table works fine there. But I have a very straight
inlet tract. I would not claim to predict what somebody
else's lineup would see. Some lids were said to affect
descreened MAFs more than others, but that's all second
or thirdhand.
I'd recommend that if you can't tune it yourself, don't
go hacking on hardware.
of the little channels. The square-law (or higher order)
drag is what evens out the airflow. The pressure drop is
substantial. Unlike most of the people offering opinions
I have gone as far as measuring it, and found it to be
nearly the same pressure-drop as a stock lid+silencer.
People pay good money to fix -that- loss.
I've been running a descreened 85mm Delphi for a very
long time now, and it's needed no real tuning; the stock
Z06 table works fine there. But I have a very straight
inlet tract. I would not claim to predict what somebody
else's lineup would see. Some lids were said to affect
descreened MAFs more than others, but that's all second
or thirdhand.
I'd recommend that if you can't tune it yourself, don't
go hacking on hardware.
#16
Joined: Nov 2001
Posts: 32,396
Likes: 1,818
From: Schiller Park, IL Member: #317
There is no proof of it reducing turbulence. It is a restriction of airflow. The Ducting is what directs airflow. There are different types of ducts to do different things (increase velocity/pressure). If screens reduce turbulence and direct airflow then you would see one in front of every turbine engine and on the top of every carb.
#19
Screen will pop out easy if you remove the front piece
and set it in a dish of paint stripper overnight. Then it
will also be easily re-installable with a bit of epoxy
should you change your mind.
and set it in a dish of paint stripper overnight. Then it
will also be easily re-installable with a bit of epoxy
should you change your mind.