Does it not make enough torque or power on the low end to get the snap off the line in RC cars and trucks need (or that people want)?
I remember when there was a RCCA review of an RC10-Gt with a converted CZ-R engine in it. They said it had crazy torque and tended to kill the clutch shoes. I think it didn't catch on for two reasons.
1. Limited RPM range (1000-18,000 for the CZR I think)
2. Fuel was expensive and hard to ship since it contains ether (I think it has ether).
someone correct me if I am wrong.