You must like a Slo Top End Ryan is correct though. When we went from 19/46 to 19/45 and this engine really started to come alive, yet lost nothing down the bottom. We then went to 20/46 and the thing became an animal. Then thinking it couldn't possibly take any more we threw on 20/45. This is geared to blazes yet this motor took it soo easy.

With the Grenit timer hooked up this configuration bettered our fastest lap times at the Vics and ran cooler.And all this on a track that had been rained on just hours previously.