VTC_WS6
July 11th, 2009, 02:40 AM
So after having my car running very well since updating to '02 OS and performing a 'from scratch' tune, I made some small changes by adding a set of ported MAF ends and installing a FTRA setup. Now off the top I expect so see a lean swing with the additional flow of unrestricted air to the MAF, especially with the ported MAF ends which were alot larger than I had expected. I went ahead and installed them, fired up the laptop and did some preliminary logging while crusing and, as expected, I was seeing a +12-15% LTFT. I added a little to the VE map since the vast majority of the effects of change would be airflow across the MAF type, and added an additional 7-9% to the MAF scale accordigly.
What I found to be most interesting, it ended up taking an addition of about15% to the MAF to get my LTFT within reasonable -2% to -7% with room for tinkering. Now does this strike anybody esle as a little 'much' in terms of adjustment? I mean I know the differience from the factory MAF ends is rather large, but does it seem like a reasonable value based on previous experiences or might I be encountering some other problem? As always any input is greatly apprieciated.
What I found to be most interesting, it ended up taking an addition of about15% to the MAF to get my LTFT within reasonable -2% to -7% with room for tinkering. Now does this strike anybody esle as a little 'much' in terms of adjustment? I mean I know the differience from the factory MAF ends is rather large, but does it seem like a reasonable value based on previous experiences or might I be encountering some other problem? As always any input is greatly apprieciated.