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Old 11-14-2011, 05:50 PM   #124 (permalink)
COcyclist
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TDi - '04 VW Golf
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Quote:
Originally Posted by CigaR007 View Post
I did some preliminary testing yesterday and the floor register opening is not effective. Coolant kept creeping up to 204F until the fan turns on.

On the way back home, I removed it, while keeping the foam casing, and the coolant temperature was rock solid at 188F. That can only be explained by a more stable air flow.

I have a feeling that the opening angle of the floor register is too sharp and the incoming air becomes too turbulent, thus affecting its cooling capability.
Ford used angled grill bars on the original Fiesta. Their testing showed that at higher speeds the boundary layer would thicken between the bars and the air would skip right over for improved aerodynamics. I hope you find a workable solution. Something that would only open after the engine is up to temperature would be very beneficial in cold weather.
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Quote:
Originally Posted by freebeard View Post
The power needed to push an object through a fluid increases as the cube of the velocity. Mechanical friction increases as the square, so increasing speed requires progressively more power.
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