Shot using the GoPro HD with the "open" back on the housing. Someone was sitting in the middle of the back seat, and I think this helped minimize the wind noise, so you can hear the engine.

The engine is running great, with the exception of the "hole" when you open the secondaries. Right up to 5,000 rpms.

http://www.youtube.com/watch?v=FHwy4sg5Hco