Comments by "Golden Croc" (@GoldenCroc) on "B Sport" channel.

  1.  @288gto7  I can agree with everything you wrote here. Consumer proiducts are different to military ones after all. By the way, I currently own a BMW with the M57 diesel engine, and its normal operating temperature is 89C. The car, as many other BMWs, does not feature a temperature gauge, but I have an aftermarket one fitted that reads the onboard data from the ECU. When I drove on Nurburgring this summer, it wasnt until about (according to the gauge) 123C it threw up a warning about excessive engine temp and cautioned me to slow down. Since I wanted to keep going at full speed, I did so. At about 128C It gave me a red light and "very high temp, stop immediately". I went on a bit further at a quite fast pace, at most I saw 131C ... Funnily enough, the engine survived (at least short term, knock on wood), however, it killed the thermostat of the engine, which failed open, so after that it wont go above 60-65C during normal driving when I drove the car home. Cheers.
    4
  2.  @288gto7  The example I gave was for the BMW N52 engine, featured in various cars of the same manufacturer since mid 2000s. From the BMW TIS about the different temperature modes availible to the DME: "112 °C = Economy 105 °C = Normal 95 °C=High 80 °C = High and regulation by the map thermostat If the vehicle handling causes the engine control unit to detect the economical operating range Economy, the DME regulates to a higher temperature (112 C)." In practice, if the load on the engine isnt too high and other parameters are favorable, it tries to regulate up to the 112c to increase economy and efficiency. Cheers mate.
    3
  3. Its for looks. Most people think it looks better. Thats the long and short of it, really.
    3
  4. Since you wrote "never made high temperature cooling systems" I must say that is not correct. BMW for example have used 112c temperature as a normal operating temperature under some conditions (by way of electronic control) since many years back.
    1
  5.  @yannick7230  You are correct in that a larger diameter will have a larger contact patch. However, the wear or breakage is a non concern even with tires half the size as described in this video, on every normal consumer vehicle on the road. The modern upsizing is almost exclusively done for looks.
    1
  6.  @TassieLorenzo  If you take note of my quote above you will see it says: "The modern upsizing is almost exclusively done for looks." Key word being "almost", not "entirely". There are lot of other considerations of why you might want to upsize the wheels, the largest one being to fit larger brakes. I can think of a lot of other reasons quite easily, actually. But in the end, they all pale into insignificance compared to the amount of cars that have it just for the looks. How do we know this? Well, I can give two easily understandable examples: 1: Most cars sold are "bread and butter cars" not extreme sportscars like the example above. They are but a miniscule amount of the totalt car production worldwide. Funnily enough, even in the case above of going for fastest laptimes which is very far from what a normal consumer cars is supposed to be about there is questionable merit to what Mr AB-80X writes. I have not seen any real world lap time benefit of larger wheels for contact patch, larger rear than front wheels, or lower sidewalls. Unless I will be presented with data that shows the benefits outweighs the negatives (chiefly weight) of larger wheels than is necessary for fitting the brakes, I get the feeling that MR AB-80X have absorbed a bit too much marketing material. 2: Very few normal cars run the smallest possible wheels that can fit over the calipers, usually only the "poverty spec" version. All in all, with a few exceptions (which fit into the "almost" category, as stated above) its done for looks. Cheers.
    1