Cam chain tensioners

Ernest Montague afm199 at
Sun May 17 15:33:36 PDT 2009

Not when the heat is carried off in steel and oil and dissipated by the 

On May 17, 2009, at 2:12 PM, Jim Stewart wrote:

> Beth wrote:
>> Rigorous testing, please. Many dyno runs. Same bike. I am doubtful
>> that there's truly a 2hp loss from using an automatic cam chain
>> tensioner. That seems like some serious drag on the cam chain and the
>> guides.
> Those two horsepower would all have to be lost in the form of heat.
> 1 hp = 746 watts, so those 2 hp equal 1.5 kilowatts.
> Let's see: a typical light bulb uses about half of its power 
> generating heat, so  1500 watts heat would be the heat output of 20 
> 150 watt bulbs. Or about 20% more than a typical electric space heater 
> on high.
> Anyone here ever touched a hot 150 watt bulb? Pretty hot, wasn't it? 
> And that's just one...
> -js

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