Originally Posted by James Sonne
I saw a dyno of the Crossfire with the Powerchip mod and its air-to-fuel ratio was totally whacked, ranging from 15.3 down to 10! Someone needs to work on programming these chips better than that! The car died slowly towards the top end at the same rate as the air-to-fuel ratio got richer. That's uber bad :-/
I had a Stage2 chip in my 93 Buick Regal G/S for 5 years and put 50K miles on it and it ran just as good the day I traded it in for the Crossfire as it did the day I chipped it.
I will be having mine Dynoed as soon as I get back in town. I am going to be out of town for about 3 weeks. But, I'm quite sure all is well. If you go to the Upsolute site or even a MB site. You can get feedback from SLK owners that have had it done and see what they are reporting. I did that and no one had any bad reports. This chip came very highly recommended and I'm very happy that I've had it done.