Hang on guys, the problem with Irvy's car at Dastek was this:
Car in Manu Mode with O/D off, into drive, braking force then applied to rollers by RR operator before flooring it. The car then would always kick down to 2nd (and RR power graph would instantly show the curve climbing steeply to 600bhp ). The operator (Gerry at Dastek) said there was no point taking top end power as it went into 3rd or by starting the braking force when it reached 3rd from flooring it as the figures would be meaningless.
When I had Irvy's car, in standard form, it made 323bhp at another rollers, Star Performance. Gerry at Dastek was unconvinced that reading meant anything as they would have bodged the power run to show anything.
As an aside, Star Performance recently bought Dastek's old rollers so will be a very similar setup to Dastek now, not the same rollers as when I had it there.
Cheers,
Brian.