I wasn't sure how I should tell this story but WTH, I think I'll start with a little quiz! Look at these two log screenshots, specifically the MAF readings. Both of these are at the EXACT SAME SCALES and zoom levels. Both of them are from THE EXACT SAME CAR on the SAME DAY and EXACT SAME TUNE. Only one small hardware change was made, nothing else.
The whole point of this thread is to let you guys know about a potential tuning problem on these cars specifically. Actually, this is a problem that isn't new at all, it happens on just about every engine out there to some degree. I'm sure some of you C6 guys have already dealt with this, and it's actually been said about this particular hardware change already before. But I don't think anyone has ever shown hard proof of the problem like I'm showing in these logs. This is one of those hardware changes that when guys do it they're all saying how amazing it is, but it's really not. It's also a good example of how inaccurate the "butt dyno" can be. (This isn't really about peak power, but this is something that is TOTALLY noticeable in the driveability of a car.)
Here's the screenshots. Let me know what your guesses are, or at least what you see that doesn't look right. Remember, these are scaled exactly the same. What hardware change could cause this?
Edit... It looks like it's a little hard to see the PID names. The MAF is the one in purple in the lower charts. Let me know if it's too hard to see these screen shots and I'll try to make them bigger.