Originally Posted by Cabocuts
Which pinion would you advise?
hate to say this, but I don't know. it'll all depend on the layout - is it tight/technical or wide open/flowing - so there isn't a 'run this and you'll be good everywhere' pinion.
its not like running the M03, you have multiply options for gearing in the TCXX
that's why I said its better to ask the guys running there what they would advise as a good FDR (final drive ratio) to start with. the FDR is something that can be passed from one chassis to another, as long as you know the calculation:
spur gear/pinion gear * 1.95
to find the pinion you'd need, do this calculation:
spur gear * 1.95 / FDR -- that will tell you the number of teeth you need on your pinion
that way, for example, a xray driver can tell you they're running a FDR of 4.5 - so you just need a calculator (or app on your phone) to figure out what'll get you close to that