Way Fast and a little hot!

I just gave my first BL set up a run out of the livingroom and into the dirt.....HOLY COW! I have never controlled acelleration like that! It was about 1/4 - 1/3 throttle and when I hit it - it flipped!

The controller and motor is getting hot - I measured 120F on both, but that was after a little cool down. Here is the set up:

12020/8 XL, 20T pinion, 51T strobe slipper, 12 cell IB 3800 (which are awesome!), UBEC, stock receiver/tires/diffs/trans, MIP CVD

Do I need a smaller pinion to keep it cooler?

Wow! What power!

I forgot to mention...it is an E-Maxx

[Nick]

Still, seems hot for a 8XL on just 12cells?

[Sneeck]

Yea you need to down gear it to 18 t pinion. It'll run better when cooler.

Fan on the esc won't hurt either.

Get ready to buy some spare driveline part's. They will not last long.

[squeeforever]

Those temps are actually pretty good but i would gear down for longer runtimes.

Squee, It was actually hotter than 120, it took a minute to get the themometer out.

Will 18 do it? I was thinking 14-16 for the pinion.

As far as driveline, what should be the next purchase? I know diffs are on the list - any good recommendations for diffs? What would be next?

When I had an emaxx I loved the UE diffs, they were some beefy diffs that could take a beating.

Not to thread jack, but on my hellfire I'm running a 16t pinion and the stock gearing on the truck. The motor gets pretty warm so should I go down to like a 14tooth pinion. It's a 10l motor and a 9918 controller on 14 cells.

What brand is UE? I have looked on Mike's web site and have not seen that brand.

Most of it is out of stock by the Look.................put a search in for Supermaxx

[coolhandcountry]

Does this mean you got the cog out of it? I would fall back a few teeth and run it.

[Mike.L]

gear down

I have been running my Emax with MIP CVDs and stock diffs and havent had any problems yet. I however will NEVER buy MIP CVD again. That dumb pin they use is a pain in the butt. I ended up welding the pin holes closed so they wouldnt fall out.
I have the 8xl also on 4s lipos. Not sure about the gearing I run a RRP slipper 66t with 16t pinion and it seems like the right combo.

I would assume 66/16 is 4.125

so a 51t/20 is 2.55

try 51t/13 is 3.923
or 51/12 is 4.25.

Not sure if I got any of this correct but it seems correct to me.

[coolhandcountry]

The mip cvd for the center is a pain. Me and my brother wraped a clamp around it. That works wonders

Does mike sell 5mm pinions?

[Dafni]

Does a one-legged duck swim in cyrcles? ;) J/k

Mike's the pinion man, he fabricates, runs, sells and lord-knows-what them.
5mm is the most common here, too.