[DeTomaso] Electric oil pump?

Thomas Tornblom Thomas.Tornblom at Hax.SE
Wed Nov 4 15:40:09 EST 2009


Yes, I thought about using a dry sump pump with an external motor, but  
I'm not convinced that they are suitable for  many years of trouble  
free service, just as I'm not convinced about the longevity of the  
Meziere electrical water pumps either.

I'm amazed at how much power you need to drive the standard oilpump.  
I've used my trusty mains powered 400 watt drill when priming the  
oiling system, and it struggles really hard when the the pressure  
builds. That is around 1/2 hp and it would be around 30 amps at 12  
volts, which sounds excessive.

I would have more faith in something that a major car maker installs  
as standard components in a standard car. A Bosch logo would probably  
also help. ;-)

Thomas

4 nov 2009 kl. 21.05 skrev "Tomas Gunnarsson" <guson at home.se>:

> This doesn't sound too hard. Running a single stage external pump of  
> the same type as dry sump engines use would cover the pump part.  
> I'll leave finding a variable speed motor and driver to you. I tried  
> calculating the theoretical need for power and came up with a  
> surprisingly low number, only a few hundred watts. On the other hand  
> priming an engine through the distributor hole with a power drill is  
> standard procedure and those drills aren't overly powerful either.
>
> Tomas
>
> ----- Original Message -----
> From: "Thomas Tornblom" <Thomas.Tornblom at hax.se>
> To: "DetomasoList" <detomaso at realbig.com>
> Sent: Wednesday, November 04, 2009 9:07 AM
> Subject: [DeTomaso] Electric oil pump?
>
>
>> With all the talk about the benefits of electrical water pumps, what
>> about the oil pump? I've read somewhere that new, energy efficient
>> engines will use electrical oil pumps to reduce engine drag.
>>
>> Are there any commercially available electrical engine oil pumps that
>> are suitable for a low maintenance ordinary car?
>>
>> I'm looking for something similar to the high pressure fuel pumps  
>> that
>> all cars have had for the last 30 years, which provides years of  
>> trouble
>> free use.
>>
>> Having electrical instead of mechanical pumps would allow running  
>> them
>> at optimal working conditions. No oil pump relief valve, just  
>> reduce the
>> pump RPM if the pressure is too high, and regulate the water pump to
>> obtain desired engine temp, no need for a thermostat, other than
>> possibly for warm-up circulation.
>>
>> Now that I have a roller everything valve train, and potentially  
>> usable
>> electrical water pumps, it would be nice to have just the alternator,
>> A/C compressor and valve train as power robbers, and being able to  
>> run
>> the pumps independent of the engine gives advantages like pre-lube,  
>> easy
>> bleeding, after cooling. Removing the water pump also allows a flat  
>> bulk
>> head cover.
>>
>> Maybe I should look into a return-less fuel feed also. No need to run
>> the fuel at full RPM while cruising at low load...
>>
>> Thomas
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