Say SuperJ:
Here's another piece of data for the HP wars. On the Amelung Modellbau website, they've posted some dyno tests of the ZDZ-160 with various K&S tuned cans. From memory, it's about 12 BHP. They also posted results from some German mag test of a 3W-150 - similar power. So the manufacturers kind of put a wild guess in the ads for power rating....kind of like Detroit did in the 1960s. You know....horsepower measured at the wristpin.

I assume that ZDZ will send you a new motor to replace the one that fragged. Plan to test that one too?

And ^Kris:
The definition of a good engineer is one who knows in which book to find the answer. Usually it's not the engineers that screw up the design, it's the bean counters.