1/8 Electric buggy (at truggy weight): BLS351, it has gobs of torque, is fast and quiet.
1/10 Electric buggy: BLS451, very fast, cheaper than the BLS351, though not as torquey.
I only race.
I would suggest looking at the Savox servo range, they are cost-effective (even in the UK!), and seriously high spec. They have titanium gears, and with the coreless motor versions come in three flavours:
- 1257TG : 0.07s transit time, 10 kg/cm torque
- 1256TG : 0.15s transit time, 20 kg/cm torque
- 1258TG : 0.08s transit time, 11 kg/cm torque
The 1256TG looks to be the best bet for a truggy there.
Though, an ACE/AE DS1015 is always a good bet as they're fast, reliable and strong. However the cases need to be replaced fairly regularly.