I have heard many forum members mention this. Is there an increase in HP? Are there any drawbacks?

 

Good question..any benefits/drawbacks to doing this??

 

Check out the scan and tune section...I've read several threads on dyno runs that would indicate that almost everyone who has taken them off has put them back on do to mixed or inacurate reads by the computer...but there is a wealth of info over there...

Peace
Willfulone

 

Haven't seen any posts in a long time about this topic, but then I don't visit the tech section too much anymore. May want to post there and see what they say. I too have heard that you can get some mixed results by removing the screen.

 

I don't think it's worth the effort from what I've read.

 

I did it! it is not worth the trouble it makes it surge a little at low speed it can be reprogramed, i did not see any hp gain just my 2 cents!

 

What I understand about this topic is this. I know I'm stating the obvious here but it seems a lot of us misunderstand what this device is.

The name of the device is MAF for M*** Air Flow. It's a meter. It is a device that measures how much air is entering your motor at any given time. The computer looks at the signal that the MAF outputs when it needs to make an air/fuel/timing calculation. There is a table of values in the computer that corresponds to the frequency that the MAF puts out in reference to the amount of air it is measuring. What happens when the screen is removed? It does allow more air to enter the motor, but the extra air that enters the motor is unmetered somewhat. The MAF is precisely calibrated to use air velocity through a known volume (the amount of air inside the MAF including the screen) with the barometric pressure as a coefficient. When the screen is removed it throws the 'known volume' constant off and the calculation is skewed. This calculation is not only used to provide the proper amount of fuel to the mixture, but it is also used to calculate the load the motor is under. This load factor is then used to look up a value in an ignition timing offset table.

The downside to this is sometimes the opposite effect from what was intended. You get a leaner mixture and less timing resulting in less power to the wheels. Sometimes due to the way the car is set up it will have a positive measurable hp effect. For instance if you are running on the rich side. There is one important consideration when doing this mod. It will only be effective for part throttle driving because when you go WOT the PCM stops using the MAF and uses different means to calculate the air/fuel/timing. You can remove the screen and have it be effective but what needs to be done is the MAF lookup table in the PCM needs to be altered using a tuning package like LS1Edit or HPTuners. This will in essence recalibrate the PCM to the new airflow rate the MAF is reading.

 

Waste of time & effort......no gains....poss. problems!

 

I removed the screen no problems for and it will still measure the the amount of air into the engine as long as you don't damaged the sensors.

The Z06 MAF doesn't have a screen

 

I installed a Vararam together with my buddy. I have a 04 m6 Coupe he has a 04 ZO6 I removed my MAF Screen cause his does MAF did not have a screen from factory. So if GM went to the trouble of removing the screen on all ZO6s then there might be slight improvement, I don't think is much but whatever since I did it while installing the VR I can't tell exactly any gain or losses.

 

Thanks for the replies. I think I'll just leave well enough alone.

 

I removed mine a couple of years ago, also ported and polished the MAF housing. No more ruff edges from the screen removel. I have had no problems, but I have no numbers before or after to prove the results if any.

 

But it has has a different MAF table.

 

the Z06 does not have the same tuning,, different cam profile, different heads, different intake etc... to different animals in terms of the MAF

 

im gonna leave mine alone. i think its a waste of time

 

I removed the screens from my C4 LT1, no gains. I'll not do the same on the C5.

 

Removed mine with intake install, no problems so far.

- Matt

 

There is no gain and could cause a surging problem.

 

DONT DO IT

If you want hp...then dont pretend to get it...
Bypass tubing, screen removal, and other token gestures are equivalent to adding CAJUNY2KC5 steering wheel decals...
...and contrary to the 10hp gain he purports, there is absolutely nil

...oh ...no offence CANJUN....