Actually, longer rods reduce the piston speed, and angular force
against the cylinder wall. However, They may weigh more. Shorter rods
can increase torque due to the sharper angle the rod will have to the
crank through the power stroke. However, It increases mid stroke piston
speed and the angular force against the wall. It's all a compromise.
Rich
> ----------
> From: Bill Gegg[SMTP:billgegg@ci.antioch.ca.us]
> Reply To: Bill Gegg
> Sent: Wednesday, September 10, 1997 8:23 AM
> To: rpalmer@ames.ucsd.edu
> Cc: tigers@autox.team.net
> Subject: Rod Length
>
> Bob Palmer wrote: I think a solid case can be made for
> longer rod length in terms of reducing stress and allowing higher rpm
> operation.
>
> I have a difficult time with the concept of increasing rod length for
> reduction of stress and allowing higher rpm operation. With increased
> rod length, comes increased piston speed with resultant increased
> forces
> leading to increased stress on the bottom end. Additionally the
> increased piston travel, with increased rod weight seems
> counter-intuitive to increased RPM. Enough "increases" for one day.
>
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