Originally Posted by ZAHANMA
Well it's been proven that you don't need a piggy back for a turbo setup on these cars. Eurocharged/LET has a turbo SRT6 at over 500rwhp. So I would go with no, you don't need a piggyback for your ECU...unless there is something about a rear setup that would make it any different...
The SRT has an ECU that is programed to read boost which makes it easy to change how that boost is produced. I have posted a couple of times that based on how I am going about my V8 swap, I believe you can take a used SRT ECU and preferably with the wirirng harness and send the ECU to Beckmann Technologies to be unlocked. You then use the STAR Daignostic System to program the the SRT ECU to the n/a Crossfire. When you Enter STAR DAS you would chose by car and not by VIN. You cannot chose Crossfire in Star DAS but you can choose SLK32. I have already tested my STAR sysem on my n/a by choosing SLK320 and it worked fine because the part number on my ECU is exactly the same as what comes in the SLK320. If someone sends me the MB part number on your SRT ECU that starts with "A 112 ....", I will check to see if it is the same as the SLK32. Or you could just get a used SLK32 ECU if the numbers are different. IF fine tuning is still needed Wyne form LET/Eurocharged would be able to make adjustments. Fuel pump and injectors form an SRT might be a good idea as well.