Connecting rod length

Is there any association of tuning window to rod length?

As in, the longer rod narrows the tuning window where a shorter rod can broaden the window. Or vise versa

Some people think there is, due to the piston acceleration with shorter rods, away from TDC. However, when you do the math, it might amount to a small difference such as .003". IMO that's flyshit, and is a non issue. I would rather go with longer rods and reduce rod angularity on the cylinder side wall.
Charlie

EverySparePenny wrote:Is there any association of tuning window to rod length?

As in, the longer rod narrows the tuning window where a shorter rod can broaden the window. Or vise versa

It depends on a few things,What you are doing with the engine. Deck height, Runner lenght,and planed RPM

EverySparePenny wrote:Is there any association of tuning window to rod length?

As in, the longer rod narrows the tuning window where a shorter rod can broaden the window. Or vise versa

The difference is minimal other than where the downforce of the piston combination exerts pressure.
A shorter rod will exert more pressure on the cylinder wall and less on the main bearing saddle as a function of rod angularity in the bore where the power forces are taking place above the piston. A longer rod will do just the opposite.
Unless you are talking about an inch of difference then it will not be much.
A longer rod will move the piston very slightly slower near the top of the bore but, faster than a shorter rod near the bottom of the bore

The biggest difference will be with a stroker engine where the shorter rod will expose more of the piston to the crankcase below the bore at the bottom of the stroke.