Subject	How is the redline limit determined?
Posted by	shirow on July 15, 2003 at 12:40 PM
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Message	I was thinking about this the other day. My guesses would be: 1. Run multiple engines through life testing at various RPMs and determine which max RPM will still meet reliability goals for component wear and failure. 2. Run multiple engines through short duration high RPM testing and see what max RPM will result in component failures. 3. Run the engine at high RPM, detemine at what RPM the engine destroys itself, and subtract 2000 RPM.
Follow Ups	How is the redline limit determined? - shirow 12:40:33 07/15/03 Dependent on cylinder configuration, bore/stroke, valvetrain - U ZCREAM 12:49:10 07/15/03 Don't forget tolerance and balance of parts (n/m) - NytWolf 13:11:19 07/15/03 I think trial and error woudl be too slow: - therinL 12:57:20 07/15/03 'valve float' is first most common problem. - nixit 13:27:35 07/15/03 Umm... - therinL 14:41:58 07/15/03 Not always smashing a valve. true valve float begins - RT 15:00:07 07/15/03 Actually, it has more to do with the valvetrain design >> - ChristopherTheOne 15:44:10 07/15/03 Thanks guys, great answers. (n/m) - shirow 18:08:41 07/15/03 You also have resonant frequencies to worry about - NATAZ 14:36:05 07/15/03 The Tacoma Narrows Bridge comes to mind (n/m) - U ZCREAM 16:09:24 07/15/03 when you stop making power ;) (n/m) - Sweet Z(UTAH) 16:22:15 07/15/03
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