One of the reasons the performance of the 0-200 seems so much better is that along with the additional 15 HP increase the STC also calls for a climb prop. Great in the higher elevations, the STC was originally done up in Colorado but can be a busy down lower. Basically the 0-200 is a C-90 that has a vacuum pump and turns faster to get the additional 10 hp. The primary change is the cam to allow valve timing to work more better at higher RPM. Those with an illegal "normal" pitch still get improved climb over the 85-90 hp models. BTW the 0-200 has the same problem with 100LL as the rest of us. It's the low compression that is the real problem. Dave Hubbard 41 Charlie http://www.flash.net/~dmprosvc/dave
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