MAF Screen
Pro
Joined: Mar 2002
Posts: 632
Likes: 0
From: Enterprise AL
Originally Posted by gyoung
This is exactly what was written in the book. Just looking for other opinions. So far it looks like those that seem to know what they are talking about say to remove. Any thoughts from the speed shops that watch here? 
What "book' was that in? I had read it someplace on-line, or maybe it was in the video that came with my car. At any rate, if there's a good book out there I think I would like to get it. There seems to be lots of interesting info behind the scenes of the C5 development.
Stan
Instructor
Joined: Jun 2004
Posts: 104
Likes: 0
From: South Carolina
Originally Posted by Gordy M
We had the chief LS6 engineer at a club meeting when the 2002 Z06 came out. He was mentioning where the HP gains came from over the 01. The descreening of the MAF gave them almost 2.4 FWHP, probably 2 RWHP. He then went on to mention they had to alter the PCM code to compensate for it. When you put a Donaldson air filter on a 2002+ Z06 you run into the pig rich situation and the 01 did not have that problem. Solution, if you do it you have to retune.
I knew it!!! This is exactly my problem! My stock '01 runs great but my '02 with no MAF screen (from the factory) and a Blackwing runs like crap.
I have never tuned a car. I dont have anything like the HP Tuner but if I have to get it I will. Two questions:
1) what needs to be tuned in the car to fix my issue?
&
2) what is the cheapest/easiest way to do it?
thanks guys!
Safety Car
Joined: Nov 2003
Posts: 4,979
Likes: 5
From: San Diego, CA "leaf" "tee" "e"
1. The PCM needs to get tuned. Surely I'm answering the wrong question.
2. Find a buddy with HPTuners that has the same year C5 as your C5. HPTuners single user licenses can program any car of the same year. I just found someone local with the same year C5 as my car, and damn near exactly the same options as my car, so I'm going to hook him up with a tune when I get better.
2. Find a buddy with HPTuners that has the same year C5 as your C5. HPTuners single user licenses can program any car of the same year. I just found someone local with the same year C5 as my car, and damn near exactly the same options as my car, so I'm going to hook him up with a tune when I get better.
Safety Car
Joined: Oct 2002
Posts: 4,434
Likes: 0
From: Austin TX
Cruise-In IV Veteran
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St. Jude Donor '03-'04-'05
I've heard a lot of discussion on both sides. I thought that removing the screen increased airflow a little bit, which changed the reading on the MAF, which would cause it to run a little bit leaner. This gave some early C5's (97, 98, maybe 99?) a few extra hp because the stock tuning was a little rich, and this balanced it out.
In a nutshell, if you do it, you will need some tuning to keep it running right.
In a nutshell, if you do it, you will need some tuning to keep it running right.
