Originally Posted By: supton
Originally Posted By: Miller88
Old 18 wheelers used to have mirrors pointed at the exhaust stack so the driver could watch and avoid rolling the coal on hills.
Did not know that. But was it to not roll coal, or was it to keep EGT's down?
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Originally Posted By: tdpark
Those prius owners forget the carbon footprint of their cars. The stuff in the battery has to get mined, then refined- then shipped to japan then the whole thing gets shipped back here. For awhile- the lithium was coming from Canada so basically the battery started in Canada, went to japan then back again. They have consumed a large amount of resources just getting the thing here. They start with a big negative.
Pretty sure stuff gets shipped all around, not just out of Canada, and not just for Prius.
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Originally Posted By: Miller88
There is no point. You're overfueling the engine. Black smoke = unburnt fuel. It's not a GDI engine, so it doesn't benefit from cooler cylinder temps when doing this. Drives EGTs up, soots up things everywhere.
At the moment my Jetta rolls coal above 3k. Haven't figured out why. Below 3k it's not so bad, but I think it's smoking there too. But at 4k at WOT--wowzer, it's bad right now.
I gotta convince myself to finish selling it...
Mainly avoiding higher EGTs from what I understand. That was a good way to pseudo monitor it, I guess, without a pyrometer. If it's pulling hard enough at a lower RPM and enough to start puking out black smoke, then it's likely starting to build up higher EGTs.