[Land-speed] Bearing clearance

[drmayf]

"bearings are bearings"....yeah you'd think so, but them you'd probably 
be wrong!  I can loan you a good book on tribology  should you be 
inclined.  Journal size makes a difference, how the oil is delivered to 
the bearing makes a difference,  bearing whirl makes a difference.  lots 
of things can make a difference.  Had this be a 427 side oiler, I had 
some factory infor for the lemans motors they ran way back when.  alas, 
twas a ch*vy..

You headed out in the morning?  Which way you decide on? 

mayf
Skip Higginbotham wrote:

> More important than clearances is oil volume. If you run a dry sump 
> system, you're fine. But if you run a wet sump, be sure to have at 
> least 12 quarts of oil or one of the newer blocks that have priority 
> oiling. I have not so good experience...........
> On the subject of clearance, with lower viscosity oil, reduce bearing 
> clearances. And piston skirt clearances. Depending on how light the 
> oil is, 2 to 3 thou on the rods and 3 to 4 thou on the mains. At least 
> 50 psi oil pressure and even better, 10 psi for each hundred HP. Doug 
> Odom is a good source of info on engine lower ends.
>
> It matters little the brand of engine....bearings are bearings.
>
> Good luck,
> Skip
>
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> At 07:40 PM 5/10/2010, John Burk wrote:
>
>> BBC
>>
>>> John, 427 what? Chevy? Ford?  If tiz chevy and a stroked small block 
>>> then excuse the ring, lol.... I know nothing about them ch*vy 
>>> critters...
>>>
>>> mayf
>>> John Burk wrote:
>>>
>>>> For a 427 stroke , 7500 rpm and the lighter oil everybody uses what 
>>>> sort of
>>>> bearing clearance works at Bonneville .
>>>>
>>>> John Burk
>>>
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