Thanks for the info, Andy. I thought there might be something wrong with my engine.
I need to open up the exhaust and do some more research before trying to add fuel. In fact, I really don't know how to add fuel. My Bentley's identifies the rod that sets max RPM (5050-5150), but doesn't get into tuning it.
I think there was a link recently to a page where someone identifies the major go-fast parts of the pump, but that pump looks quite different to mine... :?
In any case, I will be sending it to Giles after I pull the engine. :idea: