I have seen where a few people are running XBR's without the heatsink.

Is there any problem with that? Do you need to put the screws back in?
What about having the electrics exposed?
It would sure fit better without the heatsink.
Thanks

most people are installing a flat plate style heat sink like in the GTB 4-cell speedo.I sure wouldnt run it without something there to cover the fets and help dissapate some heat.

The GTB cover will fit the XBR , that is what i put on mine and it works fine

can anyone tell me the difference between the two if both are 13.5 with sintered rotors, and does the gtb speed control make the ss faster? xbr 13.5 vs 13.5 ss thank you.

the xbr (ex motor) is not sintered. but its a bolt in upgrade once you are ready. it alredy has thr bigger endbell/bearing.

briano my ex 13.5 didnt came with the bigger bearing on the bell end
thanks Dave

I've been running an XBR every weekend (carpet oval) without the heatsink on it since this past September with no issues. I just put the screws back into it. The air flow over the fets is adequate to cool them (just look at the Tekin G-11).

I've been running the XBR hooked up to a SS17.5 Pro motor. Most of the guys I run against run GTB's. They might have a touch more 'squirt' out of the corner but I run with them down the straights. If I could set up my chassis to get through the corners (and drive a nice consistent line!) I'm convinced I could run right up with them.

If your in the top of your class with stiff competition, get the GTB. If you're like the rest of us the XBR will not hold you back. Spend the $40-50 you save on tires.

briano my ex 13.5 didnt came with the bigger bearing on the bell end
thanks Dave

it had to have, they are not making the old thin shafted bonded rotor anymore. so are you saying you upgraded yours to a sintered rotor, and you had to buy a new endbell too ??