Pete,
well done, when you consider that a 3.8 litre 911 GT3 puts out around 430hp - on a cubic capacity to cubic capacity comparison basis, this has to be close to kicking butt. This is without titanium con-rods, and a very high redline (8,500 rpm).
With the weight stripped out of the car - it should nearly have the power to weight of a 996 Cup car.
Interesting to see what the throttle response is like under load and whether or not some form of additional throttle area would hel pit breathe better.
Still - muchos cudos for having a red hot go. You would have to say that there are also some big cahjones involved as well.