Quote:
Originally Posted by MetroMPG
What's the wattage again? (Sorry, being lazy - I know you mentioned it in your installation thread.)
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400Watts
Quote:
Originally Posted by MetroMPG
I wonder if a better measure for comparison's sake might be the weight of the engine. The Suzuki 1.0L mill weighs about 135 lbs.
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This makes me think even more....does the firefly have an iron block and aluminum head? That 135 lbs. for a 1L 3 cylinder motor is really heavy! IIRC the 1.5L block in my VX weighs in at ~140 lbs. The block and head are aluminum with an iron sleeve pressed into the aluminum for the combustion chambers. Open block design as well.
It might not be a very measurable difference for the thermal conductance between iron and aluminum blocks especially when you have coolant in the mix as well.
Oh, Oh, just found some info:
Thermal conductivity of pure aluminum:
- Temp 68°F = 118 (Btu/(hr oF ft2/ft))
- Temp 200°F = 124 (Btu/(hr oF ft2/ft))
- Temp 400°F = 144 (Btu/(hr oF ft2/ft))
Thermal conductivity of Cast Iron, gray:
- Temp 70°F = 27-46 (Btu/(hr oF ft2/ft))
Thermal conductivity of Iron, nodular pearlitic:
- Temp 212°F = 18 (Btu/(hr oF ft2/ft))
Seems strange that they aren't really comparing the metals at the same temperature. I got the info from
HERE.