Unbelievable mileage - Page 4 - Triumph Forum: Triumph Rat Motorcycle Forums
Thunderbird Cruiser Chat Cruiser chat for the the Thunderbird twin

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post #31 of 38 (permalink) Old 10-19-2011, 04:59 PM
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Well, like i said, i don't get the difference between cold dense air and a more open airway to allow more air in when it's NOT cold out. Seems the latter brings on a lean condition that makes the bike run worse, having done that several times w/o changing the fuel.
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post #32 of 38 (permalink) Old 10-19-2011, 05:42 PM
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The temperature of the air has a lot to do with it. The colder the charge of air the better the fuel atomises and the better the charge burns. This will hold true up to the point where the air is so cold that the velocity of it starts iceing (formation of Frost like Ice on the insides of the intake system anyplace from the air filter all the way into the beginning of the ports)
Just opening up a port for more air dosnt make as small of a change in the air/fuel as the difference in the air quality hence why you usually just end up running too lean when you tried that.
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post #33 of 38 (permalink) Old 10-19-2011, 05:49 PM
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Maybe we need refrigeration units built into our air boxes.
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post #34 of 38 (permalink) Old 10-19-2011, 05:52 PM
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Hot air will richen the mixture,hence the motor won't run as well in HOT temps as it does in COLD temps.Cold air is light and hot air is heavy. Dave!!!
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post #35 of 38 (permalink) Old 10-19-2011, 06:08 PM
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Originally Posted by dazco View Post
Maybe we need refrigeration units built into our air boxes.
At the races (drag strip) I have seen people actually force air thew a cooler full of ice in an attemp to get colder air just to gain a tenth of a second.

Speaking oof the drag strip I would be willing to take the challenge of racing that Camaro! I enjoy a good day at the strip and will probably be doing a few runs to the fri night races next year with the thunderbird and let the kawasaki at home just to see what it will do.
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post #36 of 38 (permalink) Old 10-19-2011, 08:30 PM
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A friend of mine, Bob Smith, took his RGB Weslake to Daytona in 1983. It had been untouchable in the Battle of the Twins series in England but ran terrible at Daytona. He could not get it to carburate (?) properly even though there was no difference in altitude. The big difference was the ambient temperature. Back in the UK it ran really well.
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post #37 of 38 (permalink) Old 10-19-2011, 09:03 PM
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That's why those fancy cars that we can't afford have words like "intercooler" attached to their turbos and superchargers - get that air as cool as possible, has to do with compression and detonation and whatnot.

Dave - it doesn't get into the single digits around here - a COLD day here is a lovely frosted lawn that thaw's by 9:30 AM.

OldGreyBull - the story of getting my bike has everything to do with painting my car. I was saving to paint it - actually had the cash in hand - and decided to buy the TBird instead. It's more complicated than that, but that's the gist. AND when I finally do get to pain the car...you nailed it - matching paint schemes with the TBird - absofrickinlutely!!!!!

---Daryl

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post #38 of 38 (permalink) Old 10-19-2011, 09:08 PM
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Quote:
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Maybe we need refrigeration units built into our air boxes.
Except we all know where our air boxes are which is going to bring a whole new meaning to the term "freezing your nuts off." But I'd be willing to try if it also kept the IPA cool in my side bags.

---Daryl

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