[Land-speed] Bearing clearance

[Dave Dahlgren]

With all due respect I think bearing width diameter and surface speed all 
matter to clearance and oil..
Dave
----- Original Message ----- 
From: "Bryan Savage" <b.a.savage at wildblue.net>
To: "Skip Higginbotham" <saltrat at pahrump.com>
Cc: "LandSpeed List" <Land-speed at autox.team.net>
Sent: Monday, May 31, 2010 1:04 PM
Subject: Re: [Land-speed] Bearing clearance


> The closer you can get to 100% oil, the better your results will be.
> Excessive oil pressure just soaks up HP and heats the oil.
>
> Bryan
>
>
>
> 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