does it make a difference taking off the screen on the stock MAF with no other mods, and if so how do you get it off

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">does it make a difference taking off the screen on the stock MAF with no other mods, and if so how do you get it off
</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I wouldn't do it! I did and it initially helped but over time my truck got slower. I bought a stock maf from E-bay and my truck ran better, the way it ran before I de-screened the stock maf. Others will say it makes a difference and you should do it. The same goes for the Granatelli MAF's, I have one and it definatly helped my truck but again, other will say they don't do any thing.
Jim

 

i took the screen off mine and i didn't notice anything. MTI told me that it probably gives about 5hp. i have the granatelli also and i had very noticable difference with it. it's probably better if you just leave the screen on. if you wanna take it off you can turn it over with the screen facing down. take a screwdriver and kinda pull up on the mass air. DON'T TOUCH THE SENSORS. after one side pops out just take the screwdriver and turn it over and go around the edges, eventually you can just pull on it and the screen pulls out. GO SLOW and save up for a granatelli.

 

This debate has gone round' and round' but really never come to any conclusion.

Here's my take (and observations)...

1.By descreenng the the MAF you WILL increase airflow. This is a irreputable fact. If you take your descreened MAF and crush the screen as small as you can and place it in front of your MAF opening you will see just how much volume it occupies.

2.Descreening the MAF will require calibration changes. Since you are modifing one of the variables in fuel delivery calculation (delivered air volume g/sec) and not changing the reference tables, your tuning will not be "optimal." You will generally be running too lean as you have increased air but not fuel. This may or may not benefit you. It would depend upon what other modification you have done to determine if this leaner condition would provide some benefit. This is why some motors react beter to this than others...and lets not forget altitude in this calculation.

GMAF

1. GMAF is calibrated but it is calibrated to be lean. I have confirmed that in stock form the truck can pick-up nearly 5 RWHP is leaning out the fuel by 2-3 psi. The factory uses this buffer fuel to help keep the cats from melting down so use this power sparingly if you like your cats. On stock or near stock vehicles this adds a considerable amount of throttle response and a few HP to boot. As you engines capacity to produce more power increase so must your fuel delivery be increased. A simple addition to of good flowing mid-length to long tube headers may completely offset the benefit of the GMAF.

Richard