Recently acquired an Optima - seeking some opinions

[doublfelix]

Have an 80 tooth spur gear, and 75mm tire diameter. Looks like a 22 or 23 tooth pinion would put me in the neighborhood of 1 for my rollout ratio? Feel free to double check the math for me.

[Coelacanth]

Have an 80 tooth spur gear, and 75mm tire diameter. Looks like a 22 or 23 tooth pinion would put me in the neighborhood of 1 for my rollout ratio? Feel free to double check the math for me.

23T looks almost as close to 1.00 as you can get, but 22T and 24T are both within 10%, so I'd start with a 23T, monitor motor & ESC temperatures...if temps are fine, use a 22T if you want quicker acceleration, and a 24T if you want a higher top speed...or stick with the 23T. Let me know how it goes, and which pinion you chose. A few members have used my calculator and the feedback has been positive.

If you change your tires and the diameter changes, simply re-calculate for a new pinion that gets as close to your desired ratio as possible.

[EvolutionRevolution]

A one-way front diff...nice option. Those are pretty pricey on eBay these days!

Kyosho one-way diffs use the gear diff housing.

[doublfelix]

I found a bumper and the battery holder on ebay, so those should be arriving sometime in the next week. I still need to source a lower belt cover and spur gear cover. I see that Team Bluegroove offers a repro set that includes the upper/lower belt covers and the gear cover (this set now apparently is in Version 2). Does anyone have experience with these sets? The other option I've found is an original gear cover, and then a JG1516 belt cover set. Option 2 is considerably more expensive, but I can get pinion gears from that seller as well....so once I decide which route to go here, I should only need to add electronics and a body to get up and running finally.

[doublfelix]

Can someone with knowledge confirm for me: the pinion / spur for the Turbo Mid SE is 0.6 module / 32 pitch, correct? Hoping to make one more order of parts and add some electronics before I'm able to take it for a test drive.

[DennisM]

MID is running 0.6M std.

0.6M doesn´t equal 32dp - not even 48dp!
0.8M and 32dp are almost the same.

[doublfelix]

That's right DennisM, too much late night browsing / posting by me. Thanks!