Harry Im impressed if your doing the same times as john in his 260z. He has done bathurst a few times a top bloke a good pedler and owns one awesome sounding L28.
Im not worried so much with the times I do in the supersprint Its pretty well a drag race with 3 corners the hillclimb will be more interesting I normally struggle getting the power down hopefully with the bigger tyres and lower diff should help. Time will tell
Cheers Andrew