exhaust temps
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exhaust temps
Can anyone tell me why the boxer motor makes what is considered extremely high exhaust temps? At what temps does it run compared to "normal temps".
04 citrus Rockster
00 XR400R ( for gettin dirty)
04 CRF150F (My son gets dirty too)
00 XR400R ( for gettin dirty)
04 CRF150F (My son gets dirty too)
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perfectstranger
- Basic User
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- Joined: Tue Oct 10, 2006 4:49 am
- Location: Hagen, Germany
To be honest - I don´t fell like my Rockster producing unusual high temperatures.... why do you think that your´s is doing?
Is anything melting back there - like bags oder the backend?
If you really thing your engine is hotter than others are you suggest to visit a dealer - usually engine get to hot e.g. when they get less gasoline...
dirk
Is anything melting back there - like bags oder the backend?
If you really thing your engine is hotter than others are you suggest to visit a dealer - usually engine get to hot e.g. when they get less gasoline...
dirk
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riceburner
- Basic User
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- Joined: Fri Mar 18, 2005 7:54 am
- Location: Hiding in your blind spot....
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Re: exhaust temps
Possibly because the engine isn't water-cooled??csalt wrote:Can anyone tell me why the boxer motor makes what is considered extremely high exhaust temps? At what temps does it run compared to "normal temps".
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boxermania
- Quadruple Lifer
- Posts: 3644
- Joined: Thu Mar 17, 2005 6:37 pm
- Location: Baton Rouge, LA.....aproaching retirement
A quick and dirty answer to your question is that air cooled engines really weren't designed to be able to cool properly at low speeds with the advent of today's pollution reducing techniques. Lean A/F mixtures, cat converters and the such are additional heat loads that have been added and the bike needs to be moving to dissipate such.
Otherwise the size of the cooling fins on the heads would be quite large and unsightly....and then there was water.......
Otherwise the size of the cooling fins on the heads would be quite large and unsightly....and then there was water.......
Last edited by boxermania on Sun Oct 15, 2006 1:51 am, edited 1 time in total.
Member #312
06 Suzuki Burgman 650 "state of flux"
79 CBX
06 Suzuki Burgman 650 "state of flux"
79 CBX
Re: exhaust temps
From what I've read about riders personal experiences, the boxer motor won't overheat even in very high abient temps as long as your're not sitting there with the high idle lever on. That will burn things up. Sitting in traffic at 1100 rpm, I don't think is ever going to harm it. I suspect the oil temps may run over 300 degrees under those conditions though. Removing the CAT will most certainly cool things off, but the only way you'll ever really know is install an EGT sensor and gage. That would be fun to do, but like the oil temp gage, only gives you base lines. You would still have to guess what temps were too high. BMW surely knows, but it's unlikely they'd ever share that information.csalt wrote:Can anyone tell me why the boxer motor makes what is considered extremely high exhaust temps? At what temps does it run compared to "normal temps".