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I have no doubt that this cam is worth an easy 2hp at the crank on a 200-230cc CG engine with most of the gains being made from 6000rpm and up. The intent of this profile was a bit of a compromise - to get the most power possible without requiring piston or chamber machine work.
They do have other cams with less total duration, more active duration at .050: lift, and a little more valve lift that show better total gains with little to no loss in the mid range. The catch is that they do require either clearancing of the pistons or recessing the valve seats in the head to prevent the valves from colliding with one another. Heck, they have a cam (with a dyno comparison) that improves power between 3500 and 7500 quite dramatically on a CG125 (1.8whp) and another that sees a similar power increase, but stretched across a wider RPM range to over 9000rpm, with no loss in mid range power or torque. If I were wanting to go crazy with a build, I would honestly choose a different profile with the added lift.
I chose this cam due to the simple fact that it is "bolt on" power. Designed to work with stock valve springs, pushrods, etc. Nothing extra required. In the spirit of what I call low investment power adders, or stock "optimization."
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