Er, he possibly does. And he had 605 bhp IIRC? In that case I'll get my coat

I know someone with 568 bhp on a GT30, but most people seem to think that is beyong the normal range of a GT30, although I guess that depends on the actual spec of the turbo - seems to be so many variations around.

Hurry up Steve, give the good man some silly power turbo advice!