MMotorsports

I have a 99 ls1 t/a and was thinking of removing the screen in my MAF. Is it alright if I do this or am i going to have to make calibration changes. Wasn't sure if it was need to strighten the air flow or not on the ls1 motors.
anyone done this??????

02silvaZ

iTrader: (12)

i have, 10k miles later and still no probs

Cld069

iTrader: (2)

I wouldnt recommend it becuase your not picking up substantial HP. When I put my ported TB my MAF screen had a few pieces of debris on it ( a small leaf, a few peices of grass). Granted these things arent going to lock up my engine, Id still rather keep stuff like this out. Im not real sure how how this stuff gets up in there but none the less it does. Just my .02

ZL1Killa

iTrader: (17)

if your going to de-screen it, your gonna want to re-tune it, or at least add fuel in your PE mode. but if you are already running rich its gonna lean you out prolly by .1 or .2 AFR

ss1129

iTrader: (16)

I descreened my 98 m6 and noticed nothing. Not worth it in my opinion. The only reason I did it was to smash the screen down to see how much space it was actually taking up in the maf.....but I lost it somehow.

SSpdDmon

iTrader: (10)

Don't do it. That screen straightens the airflow path going across the MAF wires. Altering the MAF may create a leaner AFR calculation and lead to incosistent fueling. Most people won't notice a difference for two reasons: 1) While under light~moderate throttle, the car adjusts incorrect fueling based on oxygen sensor feedback. 2) Most people can't tell the difference between a 12.8:1 AFR and a 13.8:1 AFR in their "butt" dyno. But, running a motor that lean can lead to long term troubles. That's my $0.02 at least...

dpw41285

iTrader: (26)

what?!?! not gaing anything made taking 60sec of your time now worth it? im not saying i believe either way in the horsepower aspect. mines descreened, plus dont you want turbulant air it helps mix your af? I wont even comment on the af ratio that was posted causing long term problems.

ss1129

iTrader: (16)

I dont understand what you think Im saying. I descreened it and found no noticable gains or hinderances. I wouldnt do it again, it seemed like a waste of time to me.

bczee

iTrader: (12)

Descreening might only add HP on the upper end of your RPM Range.. for Daily Street Driven car.. it is not worth the effort.

As far as wanting more Turbulant, the Intake system is design to add all the turbulant is need itself (if any) and Since the Fuel is not added until it enter the head, where the injectors are, air turbulant is not really needed and might hurt HP. The Intake manifold is really trying to straigthen out the air flow before going into the heads. This is a dry system !

dpw41285

iTrader: (26)

now i understand ss1129, wasnt attacking just questioning

Quik

iTrader: (7)

anything in the way of flow is a restriction. since i been around GMs all my mafs been descreened and never had an issue. talking close to 100k in miles and nothing. for the time it takes its not bad of a mod.
its in the same park as TB coolant bypass and etc

every 1hp adds up in the end

ss1129

iTrader: (16)

I didnt think you were, just wasnt sure what you thought I was saying.

Silas2k

iTrader: (5)

thats y i did mine, i ran with it screened for a about 60k miles and saw nothing get by my air filter... its definitely not a "seat in ur pants" mod but hey all the little stuff adds up in the end

Sneakyws6

If it such a nad thing then why does the Z06 MAF not have a screen on it?

Mein has been gone since my car was new.

knight rider WS6

iTrader: (1)

I'm not for it either, but i was wondering why the zo6 doen't have one too.

SSpdDmon

iTrader: (10)

Let me clarify my statements here...

To tell the average owner to go out and pull the screen out of their MAF is wrong. The car wasn't setup with it that way and most people don't own their own tuning software. If you do pull the screen, it's virtually required to change the MAF table in the PCM. This is because the result of pulling the MAF screen is...you alter the airflow across the MAF leads/wires. That change will alter fueling calculations. It could make the car run slightly richer, but in most cases it leans the car out. That's where the extra HP comes from. The problem lies in the fact that many (not all, but many) bolt-on cars run lean without a tune. This is because the PCM can't measure AFR's at WOT. As I said before, light~moderate throttle is where the PCM can compensate with fuel trims. Those corrections *might* carry over to WOT and help to keep you from leaning out.....but, then again they might not. So, if you want to potentially lean out your AFR and run a lean 13.8:1 at WOT, be my guest. But, don't come crying to me when things go wrong.

As for the Z06 MAF not having a screen...it was tuned from the factory that way. It's not like it was tuned with the screen and then had the screen removed.

So to sum up:
Pulling off the screen without retuning the PCM - potentially BAD
Running a MAF without a screen - OK if tuned properly

Quik

iTrader: (7)

yes but leaning out a stock ride is helpful knowing that they are rich from the factory!

Z28LS1camaroguy

iTrader: (3)

its really only worth it if you have Speed Density Tuning, i deleted my MAF sensor with the straight tube going to the throttle body.