Quote:
Originally Posted by J77MYF
Hi Chris,
my Mid was running a 10.5 Orca Motor with a 20T pinion which seemed to be perfect.
When I spoke to Rob with the white Lazer ZXR, he was running a 6.5 motor (can't recall what make) with a 20T pinion. There didn't seem to be much if any difference in power/speed down the long straight.
|
The regular Optima has a different gear reduction, stock pinion is 14T for instance, while it's 20 or so on the Mid. With a 14T on the Optima, you get total reduction of 8.8:1. The smallest pinion listed in the Mid manual is a 15T and that gives a total reduction of 13.04:1. So you can't directly compare, you need to look what gear ratio you have on the Mid with a 20T, and then look at the Optima manual for the matching pinion teeth count.
@Chris: The Optima uses Mod 0.8 pinions, which tends to be very close to 32dp, I've been told. The Mid uses mod 0.6