Running your engine to the pin in gear should be limited by whatever the engine manufacturer has written for that engines rating. (assuming to the pin is the rated RPM too). Like RickB posted. Whatever that number is...you should NEVER be afraid to get it to the pin and keep it there as long as the manufacturer says is OK. Especially the single engine guys...if you can't get there or stay there...then how do you really trust you engine for the long haul?
Running your engine to the pin without the engine in gear is a trouble shooting operation. While it shouldn't hurt your engine to get it there and check a few things..I wouldn't be comfortable with it up there for more than a minute or two...but that's me and no mechanical/scientific reason to back it up...but then again ...why would it ever be there for more than a very brief time?
|