Thanks Deckhand. I didn't feel like repeating myself

 

This topic is like kicking a dead horse! The MAF descreen doesnt to a dam thing. UNLESS you are getting up there in the HP numbers. Not worth the time to disassemble the intake. I logged with a stock screened MAF and with a descreened MAF. THE DESCREENED MAF MADE THE TRUCK RUN LEAN!!!! How much more proof do you need than that? The MAF table needs to be adjusted ACCORDINGLY to compliment the descreened MAF. Again, I will emphasize. Do what you wish!!!

 

As an engineer I will tell you that it minimally hampers airflow, and that there IS turbulence.

 

i can tell you one thing. i know people that are running radix and whipples are have the screens in. your na engine will and cannot out flow the mass with the screen in it. man if a radix can work with a screen then it is not going to help you out. it does fluctuate in readings without the screen. and i had a Z06 mass air for a while. guess what. same times as a stock mass air. so if you think you are going to gain it for yourself then tear it out. its yours. but what we are trying to say is the experiences of the majority have found that a stock mass air works better. to straighten out the air is to get a better reading for the pcm to make changes.

 

Straight from the horses mouth. Holy hell that little screen actually has a purpose! Who would have thought....

 

Thats why i asked. Im glad i did because maf will remain stock. THANKS ALL!!!

 

yeah your not gonna see big enough gains to even mess with it.

 

hmmm

Everyone is right .. can i say that?

The MAF will cause a "leaner" that usual condition but how lean? Well, ask any tuner who works with bolt on motors and you will find few or none that will not lean your fueling by 3-5% to reach maximum power. I dont think I have ever read A-F changes caused by a MAF descreen cause more change than that in fueling. If you are still worried you have the ability to richen the condition using your factory adjustable fuel regulator - I love bypassing fuel systems.

The MAF is calibrated for the "stock" vehicle ... i.e. all stock components. By changing anything such as headers, intake tract, filter, etc you are in fact altering the ability of the MAF to work in its preset perameters. Descreening it is no different.

I have found a screened MAF is a bad thing when using dry nitrous. Creates a freeze point in front of the metering element causing too much timing to be held and prolonged artificially inflated fueling ... minor issues, none of which I think will cause problems with 100 Hp jetting but bigger this will become an issue.

Location of the MAF seems also to have some effects on its performance ... I have seen less total timing by placing the MAF on the TB as it tends to more readily absorb engine heat (soak) but in turn it allows for a nice timing buffer on the bottle. When running N/A you will loose about 1-2* of WOT timing depending on your selcted engine operating temp. (160-195 thermostats will effect this number.)

 

i do talk to tuners. daily. leave it in. a stock mass air can and will flow plenty of air.

 

The descreened MAF will help performance, but te way it does it is not good. You don't want to do it because if you are already running lean from other mods, you stand the chance to mess something up.

A correction I saw somewhere, positive fuel trims signal a lean condition I believe. The positive number means it's adding that percentage of fuel, same as a negative number, it's pulling that percentage of fuel. Tuners tune a little on the rich side, that's why they say run just barely in the neg's.