This could also be a good option instead of the Powertec
http://www.rst-v8.com
They are claiming 400bhp on mountune's dyno for the 2.4ltr, plus its 20kgs lighter.
Neither engine (like the 2.5 opel) can be stressed it seems
Will, I'll keep with the Hayabusa for the time being, but we have a few developments planned for it over the winter, as i'm sure nobody else in the class will be standing still on development
Dave