Inliners International Forums General Discussion Engines max substained RPN

I sent Tom Langdon an e-mail asking him about the max substained RPM and this is his reply.

"The 85% is a rough guideline but that is all. Bearing material and oil
temperature also can have a dramatic influence on the "Safe" speed."
Tom

So I still do not have any hard and fast rule for a guide line on max substained RPM for long distance driving. Probably the 10% advance at idle caused the problems.