The dyno part is the issue as you can't dyno the car unless there is a 'dyno mode' that nobody on the forums knows about or you get a dyno that has the rollers connected by a belt system (Mustang Dyno I believe). The reason is the ABS sensors in the front show no wheel movement and the ECU starts to cut the engine out at about 5,000 RPM to save the engine from what it perceives as possible damage.

I will be attempting a rear wheel only dyno on my SRT6 probably next week or so and the dyno technician was born in Germany and has worked on Mercedes cars for over 30 years. If I'm lucky he can shed some light on the mystery.

Back to the ECU, I will probably be getting an Upsolute upgrade before Thanksgiving. The Upsolute dealer I spoke with says they can now program the ECU from the ODBII port! YAY!

Down side is that there are no California dealers left and I will have to drive to Utah or Washington. Either way it's going to be over a 12 hour drive each way...