Brings me to an interesting question Mat

As I recently discovered an engine I purchased which I thought was an A15 turned out to be an A14, so far all it has cost me is the respect of my "datto expert mechanic mate".

From my understanding of the difference between the two engines the A15 is just a stroked A14...which should mean that the A15 will have more torque produced at low RPM, but will not manage to reach as high an RPM as the A14 - due to this longer stroke....

I'm think this means that an A14 will rev harder and thus produce good hp at the top of its rev range...sort of balancing it with the A15.

I'd like to see a dyno print out of an A14 and A15 side by side to really see the torque behaviour.

Has anyone studied this in much depth before?