Tappet has resurfaced, didn't he work there or have his car done by that mob? I thought that was his CA.

Could be completely wrong.

Fairly easy to jump on the bandwagon and say it's suspect, but I'll tell you I'd be pretty disappointed if it were completely false. For now I'm a believer, and if it is only exaggerated I'm pretty confident that I'd still be (and a lot of others) impressed with the true figures.

I wouldn't be surprised if it had fairly extensive work done internally and although it spun those numbers I seriously doubt it could do it for very long at all. All the 'extensive work' could be anything really from a custom crank, to H-beams and forgies to bigger cc's. Who knows?

I would expect to hear that it isn't an A12 and that that was never the case. I'd still be very impressed if it were a big CC A-series but that sort of power out of an A12 is pretty mind blowing.

It is seems to be a common thing for the big HP forced induction engines to have regular access to a rolling road, the thing that is common with all of the setups is (lots of) development and dedication. Perhaps a lot of people give up on their setups too early to really develop them into something really quite powerful, look at the effort that Simon has gone through. I don't think he's even used half of his tricks yet and that thing hauls ass.