It actually made 385bhp and 403lb.ft Tony - peaking at 34psi @ 4500rpm and holding 26psi @ 7000rpm (the only 4x803 car to achieve 172mph ), but that was in the days of the old Benzine equipped 98RON, when fuel was fuel, men were men and sheep were scared .

However, as soon as they went to the lower grade fuel, the turbo's started shitting themselves. I had a dyno confirmed 419bhp out of light blues and a 0.63 a/r T34, but it would lunch a turbo EVERY three months .

I doubt you could get any more than 365-370bhp on today's crap fuel with 803s. The poor old injector would be running flat out as well .