I've seen a breif tech article on an A series speedway engine running methanol, mechanical injection, massive compression and headwork. I'll see if I can find it...

My current L18 (1995cc) has about 137bhp at the wheels at 6700rpm when it was in the 1600. It may have a few more bhp now that its in my car with my exhaust system (and I suspect slightly more efficient drivetrain - there's alot less power sapping uni joints in my drivetrain), but we're planning on going back to the dyno soon...