Re: Alternative pistons and rods for V-8

Posted by Craig Hendrickson On 2010/1/23 20:15:03
Update on the rod side clearance difference.

I cannot think of any reason why extra rod side clearance would be a problem, even 0.100. The oil flow is determined by the bearing clearance, not the rod side clearance. Both the pin end and the bearing end are floating, so they are NOT dependent on the side clearance for anything but keeping the rod somewhat captured within its nominal position.

For instance one source I found on the internet says:

Quote:
some Nextel Cup engines have over a .100 side clearance when they are pin guided. Some have MUCH more. The oil flow is really only determined by the bearing clearances anyway.


On edit: "pin guided" probably means that the rod bearings are pinned rather than using normal end slots. For a HiPo street engine, pinned rod bearings are not needed.

A call to Eagle or one of the other manufacturers would be in order to help resolve this question.

Craig

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