Most old designs have rod bearings that are too wide. Any plain bearing width
and diameter is a compromise. Excessive width and excess diameter not only
increase friction, they can actually wear faster
>
> the though of narrower rods at the big end region worries me.
>
> I run an engine shop, and know from bitter experience, that excessive side
> clearance at the big end, is a major source of engine rattles and loss of
> oil pressure. most rods have a limit of about 0.005"-0.008" and in our race
> engines, we run them down as low as we can get.
>
> there are plenty of custom made rods for TR engines, so why would one
bother
> with an concept that has an intrinsic design flaw?
>
> Terry O'Beirne
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