Here are the graphs from my 2 set's of Power Runs that were both done this week. There were no changes made to the set-up of the car leading up to or between these 2 runs. The car is exactly as it was at Brunters in November. Sorry about the Digi photo's of the graphs!!
First, SCA in Norwich........
It is clear from this run that the car lost traction as it peaked in boost, hence the high peak Torque figure. However, once it regained traction, the remainder of the run is smooth and as expected.
289.1bhp at the wheels.
and I would estimate a more believable peak of 290lb/ft of Torque and around 275lb/ft Torque at 6000rpm.
Next, todays run at Power Engineering.......
The only really odd thing about that run is the RPM point at which peak power was achieved. My car rev's to 7000rpm and it clearly hit the limiter. However, if you stand back and analyse both sets of figures, they are actually remarkably close.
So, overall I am over the moon with the results. Comfortably into the 300bhp bracket on a standard Crank, standard Head Gasket and standard Cast Exhaust Manifold.
Chris at PE commented that he thought that it would benefit from more advance at the top. This was mainly due to the fact that the Exhaust Manifold around the collector was practically transparent by the end of the run. More advance would have most likely increased the power slightly. Personally, I think it needs a Tubular Manifold.