Quote:
Originally Posted by Augustine09
@road_ripper:
Bro could you please elaborate on the changes made to the engine. I'm not that technically sound but curious to know how the power is increased by opening up the exhaust port. Is it mere enlarging the exhaust port ? or something else ? 
I presume the number of cycles would increase by doing so, there by increasing the rpm. Do you mean to say that the torque change could possibly increase the power ? Kindly bear with me if I'm not talking anything sensible here.  |
I guess you know how a four stroke engine work. Out of the four strokes( Intake, compression, combustion and exhaust) only combustion is the power stroke all the rest strokes are idle and uses the momentum created by the power stroke. As our motorcycle engine have only one cylinder, even a small reduction in back pressure can make a difference. If you are opening the exhaust port it means that you are reducing the pressure required to push out the exhaust gases and more heat is transferred out of engine.
To make this point clear, imagine if you are waving your hand in flame very fast you can hardly feel the temperature as it take a particular amount of time to transfer heat. So if the exposure time is less that means less amount of heat is transferred from the hot gases to engine.
Please correct me if im wrong.....