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Saw it mentioned that the CB likes the cold weather. Not surprising given the nature of internal combustion. But I got to ride in close to freezing weather the last few days, and I really like the way it ran. Especially with the ethanol free gas. Then again, it may just be all in my head and its simply running well because its just that damned good.
Now, if it would just stop snowing, don't want to have to put chains on this thing...
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I think bikes do run a little better in cooler, less dense air too ... At least my seat dyno says so.
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Does anyone else live where they have this "winter blend" of gas? Could that be making it run differently? I know around here they have that winter blend gas
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Cooler air = denser air = more oxygen.
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Been out in the low 30's (F) here some and the bike still runs great. I believe that the fuel injection does a pretty good job of compensating for changes in temperature. One of the reasons I got the CB1100 was because of that. I rode my Maxim 550 all year round and had to fiddle with the mixture to keep it running smooth as the seasons changed. Really nice not to have to do that with the CB1100.
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Winter gas bad. Let's not open that particular can of worms. I do use stabilizer in my engines, and my snowblower that has sat for a year fired up on the third pull. And runs like a top. As does my 72 CB350, but I don't take that out near as much. Getting warmer gear and maybe the heated grips next. That will fix everything except the weather conditions.
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(11-15-2013, 08:29 AM)Deanohh_imp Wrote: Cooler air = denser air = more oxygen.
Aww crap..I had denser, then changed it to less dense. 50/50 shot and I got it wrong. Now, you know why I don't buy lottery tickets.
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As sanoke said, the "modern" fuel injection compensates air density (be it because of temperature or altitude).
Only "old" carburators had issues with more/less oxygen.
There might be a difference for our CB 1100 between hot and cold weather: maybe under very hot conditions the air cooling is at its limit and the fuel tends to more spontaneous combustions in the "overheated" cylinders. Just guessing...
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Theres no doubt that any IC engine will make more power with colder air vs. hot, all other things being equal. That includes FI engines, and its why you'll see racers doing things like putting bags of ice on their intakes / intercoolers between heats (pun intended).
How much differenence? Enough to tell, especially when you're going from the low 90s to the mid to low 70s overnight.
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(11-15-2013, 10:21 PM)ingobohn_imp Wrote: As sanoke said, the "modern" fuel injection compensates air density (be it because of temperature or altitude).
Only "old" carburators had issues with more/less oxygen.
There might be a difference for our CB 1100 between hot and cold weather: maybe under very hot conditions the air cooling is at its limit and the fuel tends to more spontaneous combustions in the "overheated" cylinders. Just guessing...
I'll bet that's why Honda recommends 86 Octane. The compression is pretty low but being air cooled and lean due to emissions, summer heat may push it towards pre-ignition.
