Re: Project Crossfire - a Rotrex Supercharged Limited!
Thanks all! I've been pretty busy as usual but still managing to get some time in on tuning. That said, the Mercedes Demons did decide to raise their ugly head one last time. While I wasn't getting any persistent CEL's, under certain conditions my AFR would go insanely rich to the tune of 9:1. It took a little while to massage it and find the right settings to make it stop that symptom without simultaneously creating a CEL.
It was a lot of work, but I did it! Now that I have that fixed, tuning is pretty much the same as it is with any car. I have highway cruise perfect, and am now working on WOT pulls and tweaking the tune for max power. Although the latter was on hiatus for a while, as I got side tracked trying to end my dependence on the SPD for data collection and dyno tuning. The AEM datalogs at a much faster rate which makes for better resolution all the way around. However, it doesn’t monitor vehicle speed. It looks like I can buy an analog converter to convert the GPS speed pulse to an analog voltage (0-5v) that I can log with the AEM. However, the mini project I started was taking too much time so I decided to move forward with what I had and keep the ball rolling. I should in fact be able to post some numbers in the next week or so!
It is actually pretty amazing. The AEM FIC works very well with the SRT tune once you compensate for the differences between the SRT twin screw supercharger and the Rotrex. I've picked up a ton of tips and tricks to make things run smoothly and I have to say, the end result is very nice. In fact, building on what I have done so far, you could use the AEM to tune pretty much any type of forced induction for the NA without much fuss in my book. Not that it wasn’t without fuss getting here, but now that I have the nut cracked, the door is wide open!