[DeTomaso] Remote oil filter setup

Wed May 6 03:16:55 EDT 2009

Asa, you are on the right track here. What builds pressure
is not really the pump. If you let the pump flow out the
open air, ther will be no pressure att all. So, what builds
pressure is how big a restriction you put on the outflowing
oil.
Oilpumps is of two types the Ford "star rotor" type or the
"two gear" type. these pumping gears areallways the same
in "diameter" but cut in different length for different capacity.
So a "high volume" pump is nothing but a "longer gear" set.
If we use this "longer gear" pump, this will try to force more
to pass the same size "engine orfice", therby building greater
pressure.
Now, I did NOT involve the pressure regulator here, but this
does only recirculate some of the oil to lessen flow volume
thereby lessen the pressure.
Regards
Goran

----- Original Message ----- 
From: <asajay at asajay.com>
To: <detomaso at realbig.com>
Sent: Wednesday, May 06, 2009 1:18 AM
Subject: Re: [DeTomaso] Remote oil filter setup

> Okay, I can buy part of this, but let me throw in the piece that
> -always- confuses me...
>
> If the passages are the same size, and you try to move -more- oil
> through them at any given moment (higher volume), doesn't that by
> definition have to increase the pressure?
>
> Put simply, in a reverse kind of way.... If I increase the pressure on
> my water pressure tank (supplying the house), I can fill a bucket with
> water a lot faster (higher volume).
>
> So what is the relationship of higher volume and higher pressure and
> at what point do you get diminishing returns?
>
> To me, a "high volume" oil pump -implies- higher pressure, and...
> a "high pressure" oil pump -implies- higher volume.
>
>
> Somebody fix my brain!
> Asa Jay
>
> Quoting boyd casey <boyd411 at gmail.com>:
>
>> Isn't there such a thing as oil pressure being too high? With out really
>> knowing anything about the science behind the flow dynamics I would think
>> that higher pressure would put more stress on connections and gaskets and
>> increase the possibility of "blow by" and leaks. I would think that a 
>> higher
>> volume of oil flow would be preferential. My logic may be flawed but the
>> more oil volume flowing through the system the less time it has to get 
>> over
>> heated and the greater volume being pushed through the filtration system 
>> the
>> more often the total volume is going to be cycled through the entire 
>> system
>> and completely filtered. If the High pressure pump derives it's higher
>> pressure through the use of a high pressure relief spring,  the oil is 
>> going
>> to remain in the block longer and only move when the pressure builds to 
>> the
>> point that the relief springs limit is reached. I am pretty confident 
>> that
>> higher pressure would also result in higher temperature which is
>> an undesirable effect. Also the higher pressure will undoubtedly put all 
>> the
>> seals, gaskets , and other connections at a higher stress level and
>> increase's the chance of a failure.  It is my understanding that you 
>> can't
>> compress a liquid. When there is a fire the objective is to pump more 
>> water
>> on the fire not water at higher pressure. The advantage of a
>> greater volume of oil circulating through the system  seems to have 
>> obvious
>> advantages. If you had a pump that pushed at greater volume at a higher
>> pressure that might offer advantages over  a pump that creates high 
>> pressure
>> by using a restrictive spring valve. That concept reminds me of holding 
>> your
>> finger over the end of a garden hose. You get higher pressure but at a 
>> much
>> lower volumeBoyd.
>>
>> On Tue, May 5, 2009 at 4:52 PM, <JDeRyke at aol.com> wrote:
>>
>>> In a message dated 5/5/09 1:27:31 PM, guson at home.se writes:
>>>
>>> > Wouldn't a high pressure pump make more sense than a high volume pump 
>>> > to
>>> > compensate for inline losses?
>>> >
>>> Not sure, Thomas- maybe. Theories often confuse me and since I only 
>>> needed
>>> a stock pump for my system, I'll defer to someone who's had low oil
>>> pressure
>>> from in-line accessories and added an 'upgraded' pump. The high-volume
>>> pumps use a thicker rotor to displace more oil per revolution while a 
>>> high
>>> pressure pump has a higher pressure relief spring before the bypass 
>>> opens.
>>> Cheers- J Deryke
>>>
>>>
>>> **************
>>> Remember Mom this Mother's Day! Find a florist near
>>> you now. (http://yellowpages.aol.com/search?query=florist&
>>> ncid=emlcntusyelp00000006)
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