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At 02:39 AM 2/22/2006, Anne and John wrote:
So, how much extra horsepower can really be expected from this STC,
or how much bang for the buck ???
Technically, none. Given the physics of fixed pitch props and the
fact that your RPM limit doesn't change, you get the same
power. What changes is how much of that power is available at less
than full power conditions. This is due to the increased torque
capacity from the increased displacement and compression
ratio. Read: improved climb performance.
My Continental Engine overhaul manual says that cranks can be ground
10 thou under, would that not be the cheaper route to go, especially
with the extra machining that is necessary on the case.
There is also an STC to grind it .020 under if it comes to that. The
machining of the case is fairly insignificant. Cam to rod bolt
clearance is critical.
John Cooper, A&P
Skyport Services
PO Box 249
4996 Delaware Tnpk
Rensselaerville, NY 12147
518 797-3064
Fax 518 797-3865
www.skyportservices.net
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