[AMC-list] How much HP does an oil pump use

[David Crooks <david.crooks@xxxxxxxxxxxx>]

On 21-Jun-09, at 11:12 PM, amc-list-request@xxxxxxxxxxxx wrote:
> Now don't go to drastic measure to check this out (like disconnect  
> the pump or drain the oil and do a dyno test) but do you have any  
> estimate as to how many ponies and resultant MPG's are being used to  
> pump oil at highway speeds?? ? Just curious???Dean

Actually, I suspect a dry sump system consumes a little more HP than a  
wet sump, after all you've got 3-4 scavenging pumps, plus the oil pump  
all working.  Windage tray's and crank scrapers gain HP, by getting  
the oil ball off of the crank.  I suppose the scavenging pumps on the  
heads help with that as well, by preventing the oil from dripping down  
on the crank from above.  Their big advantage is in the constant  
supply of oil, in all conditions (acceleration, braking, cornering)  
and the big capacity they can hold, to allow for consumption by things  
like loose rings and bearings which do add HP.

But the basic question, how much power does an oil pump consume, is a  
good one!  Probably more than you suspect, although I agree, it's not  
the place to go looking for a little more ommph, unless you plan on a  
rebuild after every drive (like a professional race car).

Cheers , Dave 
 
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