[Gustav]

Sounds like your 9l may be geared too low?

These motors need a certain load to run efficiently.I was noticing how dramatic a temp difference i get from changing rear tyres on a ST(less traction less load).It was way hotter without decent traction compared to the same gearing with good traction.

I'm going to be trying a basic XL soon in a touring car on the basis that the very high gearing and air resistance will provide enough load for this motor.