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      09-07-2019, 11:02 PM   #40
AndyW
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Drives: '08 E93, '12 E82, '13 E93 M3
Join Date: Feb 2012
Location: Washington, USA

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Interesting observation: The design of the OFH seems straightforward but the measurements I took tonight we're puzzling:. After a 30 min drive on the street I observed the following:

Ambient:64F
Dash oil temp: 225F
Passenger side pipe temps at cooler:87/84F
Drivers side pipe temps at cooler::104/96F

Temps measured with IR thermometer.

It appears that flow is favoring the new path? Strange. Isn't the internal path in the OFH two open cylinders for the flow connections? I am just surprised at the magnitude of the difference.

Also, when does the stock thermostat start to open?

In any case, I look forward to seeing what happens when I max it on the track next week.
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