One thing you may want to consider is using a SRT6 ECU. The n/a Crossfire ECU cannot read boost. If you can get your hands on a used SRT ECU and then send it to Beckmann Technologies, they will unlock it so that you can program to your car. Cost to unlock is $250. Once you have electronics that can deal with the boost you may not need any other electonics such as piggy back systems. LET motorsports can fine tune the ECU if needed. You can get used ECU's pretty cheap since they are considered worthless since they store the donor vehicle VIN and antitheft data making it impossible to put a used ECU in a different car. Most people don't know they can be unlocked (returned to virgin) and programmed to a different car. This is basically the approach I am taking to get a V8 running in my car. If this approach works I don't think it makes much difference how the boost is made, such as Rotrex, turbo, or even bolting on a SRT6/SLK32 supercharger. If bolting on a OEM supercharger pulley's should be changed to limit boost to about 7.5lbs. 7.5lbs with the n/a higher compression should make some really good HP. Good luck and keep us posted. It is only a matter of time before we see a bunch of n/a Crossfires boosted. I will be looking to boost my V8 once I having it running. I don't think I will have the room for a Rotrex or turbo under the hood but have my eye on the STS rear mounted turbo. If I can get my V8 running like it came with the car, I would then install the turbo and switch to an ECU from a E or CL 55 Kompressor.