on 10/28/00 5:13 PM, Peter Balsam at [EMAIL PROTECTED] wrote:
> I have believed that the redline is a point beyond which metal starts
> "scraping" metal and damage is done. Can anyone explain this to me? How do
> engineers determine where the redline is? Is it by design or trial and
> error? Thanks.
>
> Peter Balsam
> Titusville, FL
Hi Peter,
Redline is generally regarded as the highest rpm the motor can safely be
revved on a regular basis without damage. For most motors the limiting
factor is not "scraping" - it's valve float, or the point at which the
valves give up on following the cam lobes up and down and just stay up. The
downside is collision between valve head and piston, resulting in mutual
rudeness.
They use a combination of design, trial and error and SWAG.
best,
Sat Tara
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