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Re: Anyone planning to go turbo/build a motor this summer?
Improvements in production machinery has enabled less tolerance to be required in respect of bearing clearances. Previously a softer material was necessary in order to provide for a “running in” and seating of the bearing, when first put into service. This aspect could well be kept in mind when rebuilding an engine.
If the imbedding of particles, such that they are actually below the surface and beyond being abrasive, was a in fact a theory, this has nor been proven in practice. The change to less soft material, having resulted in less wear in all respects.
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Trevor, New Zealand.
As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! 
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