[TPR] Grooved Bearings

[David in Durango]

All,
as I remember, grooved bearings were to supply oil to the journal (as 
stated).  I suppose some argument could be made for loss of bearing surface?

Not sure what current thinking is - would love to hear what Dan has to say 
and/or Russ (is he on the list?)

thanks for any input!

David in Durango

----- Original Message ----- 
From: "Asa Jay Laughton" <asajay at asajay.com>
To: <tpr at teampanteraracing.com>
Sent: Saturday, January 29, 2011 1:08 PM
Subject: [TPR] Grooved Bearings


> 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
> ******************************
> http://www.racingagainstautism.com
> http://www.teampanteraracing.com
>
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