Yes, Yang is correct we run on asphalt here in San Antonio with a approx. 150 foot straight. I ran an 81 mm rollout and it was HOT.....but the temps here are 90+ with track temps approx 120.....I will check to see what I run this weeken, we may have to run a lower rollout......

Does anyone know if the Novak XBR ESC will fit under a 12th scale body? It is the same height as a GTB.

XBR didn't fit under my 1:12, So i cut a hole for the Heatsink to poke out.

I have the GTB 4-cell now

are you able to remove the heatsink or cut it in half? if you cut it, i dont see a problem with heat too much.

I removed the height sink and made a custom one out of aluminum. looks really factory.

If you're only going to run it 4-cell and know someone with a mill just have 'em buzz the fins off. OR...if you've got a lot of spare time and a Dremel... Mind your fingies though as it'll get HOT while you're grinding.

You need the "plate" that's left though as it is potted to the electrical bits inside and seals the crap out. Won't be enough cooling for 6-cell use after that though.

so everyone is in favor of peeling the top off the orange...

Yes, before the 4 cell GTB was available I used to take the heatsink off of the GTBs and replace it with an .032" plate. Now you can get the 4 cell version which has an .063" plate, and it works very well. I've never used an XBR but I would expect the same results

Those same GTB plates will fit the XBR. Just doesn't use the center screw.

With a little tinkering you can make the XBR pretty thin actually. I cut the pins to make the two boards closer with mine and cut the case all up to make it thinner. Just needs some tape between the boards to keep them from shorting out and it works great for 17.5/13.5 in 12th. Saves about .3 ounces over the GTB 4cell.

I read somewhere that the Futaba Fasst receivers work only with 6 volt.
Does somebody use Fasst receivers on 1/12 scale with 4.8 volt?

And work the Fasst system with analogue servos such as the Futaba 9602?

Thanks...

works in 1/12 and you can run analog or digital. based on the 3pks' mode (pcm/ppm)

I've set up numerous cars with the futaba 2.4 ghz system and 9602 servos and they work great. You cannot run in HRS mode with the analog servo, though.

does anybody forsee a lipo battery being made for the 1/12th scale market?

If you mean LIPO saddle packs I think MAXAMPS already has them.

well it would need to be a battery that comes close to 4.8 volts wouldnt it?