[TPR] Grooved Bearings

[Asa Jay Laughton]

That was my initial reaction as well, which prompted the question. The 
only thing I remember covering in Automotive Technology (class of 1985) 
was bearing clearances.  I don't recall anything about grooved bearings.

I guess I need to continue the forensics on the 351C in my garage.  .... 
right after I do the brakes on Shelley's Jeep.  :)

Asa Jay

Asa Jay Laughton, MSgt, USAFR, Retired
&  Shelley Marie
Spokane, WA
******************************
http://www.racingagainstautism.com
http://www.teampanteraracing.com


On 1/29/2011 12:44, steve at donegan.org wrote:
> I would imagine there are a lot of factors here - ie what bearing clearance are you going to run, what oil pressure, what kind/viscosity of oil etc... My gut instinct is if no bearing company makes full grooved ones there is likely a good reason...
> ____________
> Steven Donegan
> SSCC/NORC Car #86
> www.sscc.us
>
>
>
> --- On Sat, 1/29/11, David in Durango<adin at frontier.net>  wrote:
>
>> From: David in Durango<adin at frontier.net>
>> Subject: Re: [TPR] Grooved Bearings
>> To: tpr at teampanteraracing.com, "Asa Jay Laughton"<asajay at asajay.com>
>> Cc: "Daniel C Jones"<daniel.c.jones2 at gmail.com>
>> Date: Saturday, January 29, 2011, 8:19 PM
>> 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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