[TPR] Grooved Bearings

[Asa Jay Laughton]

Hey all,

An interesting question came up from one of our guys privately and I 
thought I'd share.

It centers around the idea of having fully grooved bearing sets for the 
crankshaft.  The theory is if you have a grooved upper and lower 
bearing, then the rod can get lubrication during a full rotation rather 
than a half.  Oil has to feed from the block into the main bearing area 
of the crank, which then feeds oil to the rod bearing journals.

So, I'm aiming mostly for Russ Fulp here, who we know has built a killer 
engine for Mad Dawg but anyone who has been building engines should be 
able to chime in here.  What are the opinions of using a grooved main 
bearing for both upper and lower halves of the main journals?  What 
about the rod journals?

The question comes up as there doesn't appear to be a bearing house that 
will source a full set with both halves grooved (though apparently one 
source used to but no longer does).

Looking forward to the feedback,
Asa Jay

-- 
Asa Jay Laughton, MSgt, USAFR, Retired
&  Shelley Marie
Spokane, WA
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