Cool Collar, 12% reduction in oil temperature Options

[thomasotten]

What do you think? Gimmick? I find the 12% figure a little hard to believe. Maybe they were just measuring inlet/outlet temperature of the filter, not OVERALL oil temperature.

(IMG:http://content.madirect.com/img300/fr2423.jpg)

From the Tweeks website:

Tests have revealed a 12% reduction in oil temperature thanks to the Cool Collar, a finned aluminum cooler that increases the surface area by four times, allowing it to radiate heat faster and more efficiently. Unit fits all air and water-cooled Porsche oil filters with a simple slip-on, clamp down installation.

[phantom914]

QUOTE (gregrobbins @ Oct 8 2005, 02:43 PM)

............ Summary: With a constant heat source applied to the oil, the temperature dropped to 202ºF. (from 220ºF.) within five minutes. This translates to a 12% temperature decrease of the heat added to ambient temperature. .......................... They are playing with the math. 12 degrees is only 5.45% of 220. Still, lower temps are better.

They are trying to say that without the collar, the oil is 150 degrees above ambient(220-70) and with the collar, the oil is 132 degrees above ambient (202-70) or 18 degrees less. 18 degrees is 12% of 150.


The lab test is not too real world in the sense that you will not have 50mph, 70degree air blowing across your filter. Also, the rate that their test setup put heat into the oil may not be the same as the rate that your engine puts heat into the oil. Actually, I would bet on it.



They don't seem to understand the difference between heat and temperature either.


Andrew