Quote:
Originally Posted by uberwasser
It's undoubtedly true that ambient temperature doesn't make an appreciable difference in how quickly the tip of the glow plug reaches 600C, but the tip is just the tip!
The goal is to heat the pre-chamber to aide in ignition. First the glow plug has to heat the ambient air around the glow plug tip, then the air heats the metal of the pre-chamber. At -10C, all of that air and metal is going to be noticeably slower to heat than at 30C.
Using the toaster analogy, at -10C the heating elements in the toaster heat up almost as quickly but the frozen bread will take longer to toast than room temp bread.
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I really do not want to venture anymore into this subject. I am talking about the time it takes for the GP to reach temperature whether it starts at -10, 0 or 75. How much air volume it needs to heat up will be relevant but it is a function of the sensor and the battery. You can heat/glow the chambers with the battery all day long for all I care, as long as the battery can sustain it. What I am getting at is the 'scientists' comments on initial current drawn in those spit seconds. It is not significant in the grand scheme of thing. The resistance of the GP at -10 is not relevant either.
Your analogy
"The bread will eventually be toasted if you have enough electricity, or battery. It is not a function of the heating element if it is in good condition. Nor at what ambient temperature the toaster was turned on."
Enough said.