FBD, Bill,


Chuck has been repeating himself, because of what you, Dave, have been refusing to see.

You still claim (with Brian-downunder supporting you) that no damage occurs when a tapered-bore engine is broken-in slobbery, despite Fuelman's 500 RPM deficit in the OS.32SX and the 2-3 vs. 10-12 gallon engine life in cars.

500 RPM deficit is not damage?
Would you race your (supposed) F3D racer, if RPM was down 500 RPM from the next guy???

In this day-and-age of CNC production, two identical engines will differ by no more than 100 RPM, in their performance potential.
Any larger difference can be attributed only to the break-in technique.


In tapered-bore engines there is only one right way.

This is George Aldrich's way, as compiled by me in that referred thread.


Will another way, slobbery for instance, necessarily harm all engines? No, but it still doesn't make it another right way. It is still wrong!


The tapered-bore, ring-less engine is something that only exists in model engines (although there are some full size aircraft radials that have a slightly tapered bore).
There is no 'real-life' model to go on...


So it is either George Aldrich's fail-safe way, or your supposedly harmless way.
What would you choose?