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#16
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FWIW, my 617 runs better and feels stronger when I run it cooler. I used to run the 60°C Tropical Climate thermostat back when you could still get them. My Supercharged 4.6 litre 2001 Mustang GT gets equal mileage with a 195°F or 180°F thermostat. 22 mpg in California, Texas, and Florida....28 mpg in Arizona, Louisiana, Mississippi & Alabama, most likely due to the differences in fuels....FWIW
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Did you just pass my 740 at 200 kmh in a 300SD????? 1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013 100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership |
#17
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#18
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We should all remove our radiator caps and use the extra heat which is generated to propel our vehicles around.
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1968 220D, w115, /8, OM615, Automatic transmission. My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear). |
#19
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Only if it gets me 50 mpg
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#20
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I don't think these engines are capable of that kind of MPG....
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Did you just pass my 740 at 200 kmh in a 300SD????? 1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013 100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership |
#21
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If the coolant is not pressurized enough the coolant will boil, which means MAXIMUM coolant temperature will be 100 C by definition. But, coolant will be lost, obviously. By increasing pressure we increase boiling point allowing for higher coolant temperature without problem, assuming equal or increased heat power transfer into the coolant. There is no per se problem of coolant temperature, there is fire in the engine at 1000 C so these 100's are not important. The problem is if coolant boils inside the block, it can make engine overheat as the steam doesn't transfer heat properly. We want to run as hot as possible (improved efficiency) without boiling... FWIW all my MB I have seen seem to be set to have 80 C (thermostat opening) as the coldest temp and 100 as the highest (when fans start to really work) I would not consider overheating until the gauge goes to... the red |
#22
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What is counterintuitive (to me, at least) is that, if you car has a tendency to run hot, you are better off running a lower concentration of coolant in your cooling system. In other words, with pure water (assume no radiator cap for simplicity), your system would boil at 100C. As mentioned above, with 50/50 coolant (again no rad cap for simplicity), your system would boil at 107C. But you are actually more likely to overheat (boil over) with 50/50 coolant. It has a higher boiling point, but its heat capacity is sufficiently less, that you car is actually more likely to get damages from excessive temps. Of course, I am not advocating running pure water because from a corrosion standpoint and freeze protection standpoint, this is not a great decision. But I just wanted to use the limiting case of pure water since it makes the numbers very familiar.
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1968 220D, w115, /8, OM615, Automatic transmission. My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear). |
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