CRT Conversion Questions

[Steve182]

Cool, looks like I'll just have to make sure I check my gear mesh twice on this rig.

Another question now on battery and motor combinations. I think Im gonna go with the Castle 2200kv motor and am trying to decide between the 4s and 5s Zippys. I will be using the Kyosho 46t spur, and not sure on the pinion yet.

Any recomendations?

[lincpimp]

Originally Posted by Steve182

Cool, looks like I'll just have to make sure I check my gear mesh twice on this rig.

Another question now on battery and motor combinations. I think Im gonna go with the Castle 2200kv motor and am trying to decide between the 4s and 5s Zippys. I will be using the Kyosho 46t spur, and not sure on the pinion yet.

Any recomendations?

5s and gear it down slightly. 4s requires good batteries to perform optimally.

[lincpimp]

Keep in mind that you will ne going from a 62t spur to a 46t spur... You will need some small pinions.

Here is the setup with the 46t kyosho spur, and a cc 2200 motor on 4s lipo...

Differential Ratio: 3.3076923076923075
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 46
Pinion Tooth Count: 11
Total Voltage: 14.8
Motor KV: 2200
Tire Diameter (inches): 5.75
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0
Spur/Pinion Ratio: 4.18 : 1
Total Ratio: 13.83217 : 1
Tire Circumference (inches): 18.06 inches (458.83 mm)
Total Motor Speed: 32560 RPM
Vehicle Speed: 40.27 mph (64.68 km/h)
Effective KV Value: 2200

If you do not change the diffs you will most likely have to stick with 4s, as 5s will require tiny pinions to work. As far as 4s lipos go in the zippy line, the flightmax 5000 30c 4s pack is most likely the best bet. You really need the lsp diffs to give you some more gearing options with the kyosho spur.

Now if you stick with the stock spur, and go to 5s:

Differential Ratio: 3.3076923076923075
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 62
Pinion Tooth Count: 12
Total Voltage: 18.5
Motor KV: 2200
Tire Diameter (inches): 5.75
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0
Spur/Pinion Ratio: 5.17 : 1
Total Ratio: 17.08974 : 1
Tire Circumference (inches): 18.06 inches (458.83 mm)
Total Motor Speed: 40700 RPM
Vehicle Speed: 40.74 mph (65.44 km/h)
Effective KV Value: 2200

This would be a better setup. I would still suggest the flightmax 5000 30c 5s pack for this. It will weigh more, but you wil get longer runtimes, and the equipment should stay cooler with the lower gearing. Plus you can go up a bit on the gearing, 13 or 14t spur and pick up speed without over drawing the batt.