Gearing help
 

What pinion should I run with the tekin RX8 and 2050kv buggy motor? I am running a 48t spur on a losi 8ight,running 4s. Right now I am running a 16t pinion and the motor is getting waay to hot (185F):surprised:. Am I under or over geared?:neutral:

What pinoin should I run? I cant change Motor timing because I don't have the hotwire.

You're a bit tall for a 2050. Try the 15.

Use this to calculate your max top speed and will help determin proper gearing.
http://www.scriptasylum.com/rc_speed/index.html

Well it probably is the timing that is the problem, but try lower gearing first. Even a 14 tooth w/ the 1900 is still as fast as the nitros and a 2050 will be even faster. A note on timing... Using 0 timing with my 1900, I can use ANY size pinion gear up to a 20t in my 8ight and temps will always be less than 140 at the end of the run on 4s lipo.

ran 4s 15t pinion for 7 mins with holes in body and 185F, Ran 17t pinion for 7 min and temp was 190F. Timing is zero

check for binding, and make sure the gear mesh is right...

no binding, mesh is fine!

That motor is awesome in the Losi 8ight buggy, if you replace the buggy 40/13 ring and pinions with the truggy 43/10 gearing. The 40/13 just makes the gearing to tall, imo. This is from experience, on a TRACK in RACING conditions.

Driving style could be the issue. Are you sliding around in loose dirt, powering through grass, or never letting the throttle trigger breathe? And to make sure, you aren't running a big heavy monster 8000mah+ lipo are you?

no, I am driving the buggy easy around a track. I am running 2 4s 3000mah 30c packs in parallel. I ran that with the MMM 2200 combo for 45 mins continuous with no problem, and now I cant run it with the tekin for 7 mins without overheating!

What are you running in your center diff for fluid? I had been running straight 10k and temps where a touch higher than I liked, I changed the fluid and put a little bit of 50k in with the 10k and my temps are about 10* cooler. Although I didn't think I was unloading the front a lot apparentlly it was enough to raise the motor temps.

If the MMM combo worked fine, why switch?

because the mmm burned up. I am running 15k in the center

Something sounds off here. 6000mah should not get your 45 minutes with either of these setups.

2200kv motor at best would see 20 minutes on a buggy I bet at least.

The temps say you're geared a bit tall. Do you have a hotwire?

yep, I have a hotwire, and the 45 mins I speak of was running back to back. even doing that temps were under 150, but now with the tekin, I cant go 7 mins without it overheating!