I had nationals last weekend, used my newly broken in SCT and had enough power to make best lap in our track which has 70m straight. It was with 2630 pipe, 6TGF plug, 18-22pinions and 59-53 spurs, yellow clutch shoe and mugen super hard spring on my NT1. It was no issue to keep up with most guys there, including some murnan modifieds. In the final, I was leading the race but had some problems with tires so finished 6th. Fuel mileage was 5m 15s.
Im totally satisfied with this engine, and no need to buy 2009 versions...