Need help with speed calculation

[simplechamp]

Your spur should be much larger than 15T. 15T would be the size of the pinion maybe, but the spur should be 40-50T I think, don't know the stock spur for the GTP.

Export you results from the speed calc and post them here so we can see exactly what numbers you entered in.

[Big House]

Thanks. The Spur gear is 51 and the pinion is 15.