[SEL] OT - expansion of metals in oil pumps

bill at antique-engines.com bill at antique-engines.com
Tue Mar 29 05:56:11 PST 2005


Thanks, so for 350 horsepower I'd need 3 times 350 drops of oil per minute
or 1050 drops per minute.
How many drops in a quart?

>> For the engineers - rob, etc.
>>
>>Engine oil pump - automotive gear type. Gears are steel (or
>>some sort of steel product) housing is aluminum - timing
>>chain cover with pump body in the timing cover. The gear
>>to housing end clearance is supposed to be VERY close to
>>get the pump to put out good pressure. A lot of folks say
>>this is a weak design - that the aluminum will expand more
>>and open clearances between the gears and the housing.
>>They claim the fix is to use aluminum gears in the alum
>>housing so they expand at the same rate, meaning a more
>>accurate and tight pump, longer life, higher pressure, etc.
>>
>> Thoughts?
>>
>> Bill
>
>
>
> Under full load, about three drops per minute per horsepower.
>
> Rob
>
>
>
>
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