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RE: Re: Oil feed/jets to the underside of pistons

To: spitfires@autox.team.net
Subject: RE: Re: Oil feed/jets to the underside of pistons
From: Thearthurhsmith@cs.com
Date: Mon, 21 Feb 2000 10:42:48 EST
In a message dated 2/21/00 9:25:23 AM Eastern Standard Time, 
Transmancat@aol.com writes:

> My first question upon reading your mail was to ask "why". Do you perceive 
a 
>  problem with the standard lubrication system in that area of the engine?
>  In my humble opinion drilling holes in the con-rod is not a wise idea, the 
>  rod end is subject to a massive amount of load in the form of tensile and 
>  compressive stress, not to mention the temperature changes that they go 
>  through over the period of one engine cycle.

Drilling holes is NOT a "not a wise idea" it is really really stupid. If you 
do then you have to treat each hole with a chamfer and then magniflux and 
that weakening by the holes still might fail and then your next job will be 
kiss your crank, block and other parts good bye.

The oil pumped through the con rod bearings leaks out the edges and as the 
crank spins the oil is sprayed around the inside of the block. That's why 
there are oil control rings at the bottom of the piston. They scrape the 
sprayed oil off the cylinder walls.

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