[DeTomaso] Laminova oil cooler

[Tomas Gunnarsson]

Paul,

The opening/closing scenario you describe is not happening in real life. Take a situation where you start "cold" and start driving at highway speed. For me this is a practical reality as I live at the edge of town and can hit the open road within about 1 km. Engine temp rises until the thermostat starts to open, it will not open fully at once but gradually, then it will settle at a slower rising rate. Return water temp will over time rise to a steady reading with no overshoot if I drive at constant speed. I measure my engine temp in the block and the return water temp in the bend around the shifter rod below the water pump inlet.

Tomas

----- Original Message ----- 
From: "Paul - Home" <thedrol at pobox.com>
To: "Pantera List" <detomaso at realbig.com>
Sent: Saturday, September 06, 2008 12:56 AM
Subject: Re: [DeTomaso] Laminova oil cooler


>I get it now.  (cue light bulb going on)
> 
> With the cooler plumbed into the water line leaving the engine...
> 
> 1. We start off with engine, water, oil and radiator cold.
> 2. The engine warms up and hot water leaves the engine to the radiator 
> and on the way it warms up some oil.
> 3. Cold water cycles back into the engine, thermostat closes.
> 4. This cycle repeats until the water is warmed up enough to keep the 
> thermostat open.
> 
> The cold water heading back to the engine doesn't effect the oil at all 
> because the cooler is plumbed into the other water line.  So each time 
> the water leaves the engine, a little more heat is added to the oil.  As 
> long as the water is hotter than the oil.
> 
> With the cooler plumbed the other way...
> 
> 1. We start off with engine, water, oil and radiator cold.
> 2. The engine warms up and hot water leaves the engine to the radiator.
> 3. Cold water cycles back into the engine and on the way it cools down 
> some oil, thermostat closes.
> 4. This cycle repeats until the water is warmed up enough to keep the 
> thermostat open.
> 
> Make some sense.  The only downside is that you have less temperature 
> differential between the hot water leaving the engine vs. the hot oil in 
> the oil cooler.  This makes the cooling portion of the oil cooler not as 
> effective.  You may also get cooler water going into the engine 
> depending on the capacity of the radiator.
> 
> Thanks,
> Paul
> #9270
> 
> MikeLDrew at aol.com wrote:
>> In a message dated 9/5/08 9 43 28, JDeRyke at aol.com writes:
>> 
>> 
>>> Of course. This IMHO is a goofy idea since during warm-up in a 351C, the
>>> engine thermostat is closed and no water into/out-of the radiator is being 
>>> warmed
>>> anyway.
>>>
>>>>> Until the thermostat opens, which takes one or two minutes at most.   Then 
>> you have hot water, but still-cold oil.
>> 
>> 
>>>  I'll stick with the oil thermostat (in place for 4 yrs & working
>>> fine).
>>>
>>>>> Well, you're not hurting a thing by doing that.   You're just not gaining 
>> all the advantage you could, by fully implementing the device for both of its 
>> intended purposes.
>> 
>> Mike
>> 
>> 
>> 
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