"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
>
>
>
>
>
>
>
> 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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