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Old 01-14-2018, 11:12 AM   #15
biggy238
 
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Name: biggy238
Title: Too Much Time
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Join Date: Aug 2008
Location: Just North of Wrong
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Quote:
Originally Posted by Chassisman View Post
Hmmmm, strange it makes 25 in lower gears but 40 in OD?
Not entirely strange. Mechanical advantage (resistance) to the piston travel is greater in OD, so heat rejection in the cylinder is higher. The EGT is higher so more work can be done across the turbine.

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