nice truck ;) looks like you had a lot of fun at the beach.
how fast is it and how many cells were you using

I havnt GPS'd it yet, but I was running 14/66 on 14 cells. I would estimate it to be high 30's.

14/66? seems kinda low huh? im gonna be running me evo on 16 cells on a 8xl/9920 and kind need to know were to start. i was thinking about 16/66 or maybe 18/66....help please!!

Well keep in mind the size of the tires I was running. If you are running standard size maxx tires expect to bump the pinion at least two teeth. (so yes 16/66 would be a good starting point)

I actually thought I would be geared WAY too low with the 14/66 setup, but actually ran the entire time with that setup as it ran pretty well, and the top speed was plenty fast.

what about temps?

I didnt bring my temp gun with me, but temps seemed just a tad on the hot side. I am not very accurate guessing temps so I wont guess, but the motor was pretty toasty, while the controller wasnt too bad. Hopefully it will all be back together soon and I can do some more testing and have more accurate answers for you.

I could bet with one or two more teeth on your pinion the motor temps should come down. (even with the mashers, you run an 8XL after all) Give it a try.

I'm running a 9xl with 18 cells and my motor is blazing. I've tried a 14/66 and it was hot shortly, then I went to a 18/66 and it's still burning up, but not as quickly as the 14/66. I think I have to use a fan, there's no way around it.

try a 16 and if that doesnt work you might have to go higher than a 18. i have heard of people running 18/66 on a 7xl with 18 cells...

Slow-pede, I say you are still undergeared! A 9XL should not sweat on 18 cells in your maxx. Try a bigger pinion or smaller spur.



Edit: Squee, that's right. I have heard people run up to 20/51 on a 9XL. I have no experience with the 9XL, but I would say 18/66 is way undergeared.

Whoa, really?! At 18/66 the motor is blazing hot, speedo is pretty hot, and the batteries are warm. Hmmmm, maybe I'll have to go smaller on the spur.

I hope somebody confirms my info!

Coolhand has a 9XL. Leroy, watyousay?

It's actually a revo...might weigh more, but just for FYI.

yea, if im not mistaken leroy runs his on 18 cells with a 22 tooth pinion. although im not sure.

I have ran the 9xl with a 20 51 mod 1 on 18 cells. It did run warm. I have ran a 7xl on 22 66 gearing on 18 cells to. It also ran warm. I have not problems with running a 9xl on 16 51 gearing 1/8 diffs and 16 cells or 18. I can run the gearing with a 9xl on 12 to 18cells with no heat problems in 90 f temps. no fan.