I killed a standard piston with 20PSI through the CT26. I would not "NOT" assemble one of these engines for more than about 15PSI with stock pistons (we did run a bit more with the CT20 and the stockers although it is a piss weak little pump).
I reckon that 200rwkW is a very short lived engine if it is on stock pistons.
Power figure before we broke the stock unit was 220rwhp at about 5000rpm.