Anyone removed the screen on their MAF sensor and get results ?

Here's why I want to do this - read below :

"With the mass air flow (MAF) sensor, GM did what Registry members have been doing for years–remove the air flow straightener or "screen". What took them so long to figure that one out? LS6 is not GM’s only application of that MAF. Any use of it with an intake duct that curves just before the MAF (typical of trucks), needs the straightener for the MAF to sense accurately and conventional wisdom was to leave it on Corvettes. In part, the essence of what Juriga and his engineers call "the ruthless pursuit of power" is whipping conventional wisdom."

Link --> http://www.c5registry.com/2k2z06/page3.htm :D

 

I don't know if this is what your looking for or not but I did a little test on my own at the strip one day results.

Stock MAF best E.T. - 12.88@112.44 on a 1.955 60'
Stock MAF removed screen best E.T. - 12.82@112.66 on a 1.968 60'
Granatelli MAF - 12.65@113.80 on a 1.933 60'

This was done same day and air temp was 68` car was at 220` on almost every run. I was pretty consistant I did 2 runs with each and they were within .02 of my best except I got a 12.72 on the Granatelli @ 114.00.I have slight surging with the granatelli in second gear at 2.5K rpm's none with the stock no screen. hope this helps.

Oh I also have a 99 :)

 

Thanks AQUAMAN ! :cheers:

That's ex-cel-lent..... great reply to my post. :thumbs:

 

Hopefully, here's an even better one: :D
http://www.c5forum.com/cgi-bin/ultim...c;f=2;t=001658

See the link above; I hate posting everything twice, so go to this forum -- you'll probably find the information useful (the BPP ends are roughly equivalent to the OEM without the screen). Work was done by c4c5specialist.

:smash:


[Modified by EHS, 1:52 PM 12/19/2002]

 

I checked out that link and it looks and sounds like you had a on/off kinda thing with the throttle. I have driven Aqua's car both before and after the switch and it has better throttle response now with the Granatelli then with the stock MAF? I only see a win / win here? More power and better response. But then again every car responds a little different. I heard the 97-99's respond better to a MAF change the 00+ cars.

 

i had the graneteli and it was throwing codes. so iput the old one back and sold it :smash:

 

Your welcome :yesnod: and for what it's worth I have almost 15K miles with the Granatelli and no codes. I think my Bro was right the 97-99's respond better. But I have no proof of this. ;) Best of luck with whatever you do :)

 

I was only responding to the initial post that asked about removing the MAF end air screen, not changing out the MAS, which I didn't do. What you saw was all apparently related to the screen, and turbulence in the airflow over the wires in the MAS -- the Tech II readings actually show the turbulence.

The problem with the Granatelli (like all the MAF translators), is that at anything other then WOT, because of the O2 sensors, the PCM will relearn the trim tables and learn out any changes made with the Grantelli after about 50 miles. The air/fuel program does not operate in a closed loop on the C5, and the O2 sensor readings will also be taken into account. In other words, even if you dump more fuel in, the o2 sensors will see that in the exhaust gases, and the computer adjust accordingly. The only way to address that over the entire operating range is with a program like LS1Edit, that flashes the PCM, or something like the Predator. Both actually rewrite the fuel trim curve assumptions across the board. And that's a whole other story.

You didn't mention whether the car you drove had the screen in or out. It would be interesting to see if, in 3rd or 4th gear at 2,700 rpm, when you mash the throttle, the car intitially "bogs" a little.

Again, I was purely talking to the issue of the air screen's effect in those posts.