I've found the new b2101 to be a very aggressive engine. Personally the 2090 is too much pipe in a buggy as it makes you be very careful on the gas, the 2060 i find is better suited on a buggy as it smooths out the power and makes it easier to drive. Unfortunately it's not a 10+min buggy engine and is marginal in truggy. The reds engines i ran previous were much better on fuel but lacked the brute power of the new os.