Thanks Lou. But, I think the part about the cost remains the same, no?

As for the wording in the SSC rules; it is done that way to keep the engines involved as close in performance as possible.

Also, there are scant few pilots that do internal modification to their engines in any class. More common are cheap and/or simple things like mousse-can mufflers and bladder type fuel tanks. So, no one needs to "be friends with a machinist to compete" in any of the RCCA's classes.

D