BuellerPilot
Well-known member
- Joined
- Jul 19, 2010
- Messages
- 1,226
Depends on your goals. If you goal is to have a fun streetable bike then YES!
We spend 90% of our time in the low and mid portions of our RPM range. It only makes sense to optimize this portion of the power band for a street bike that is enjoyable to ride.
If your goal is maximum acceleration then NO. Again, HP is a function of torque times RPM. The cool thing about HP is lets say you have an engine that make total flat torque from idle to 8,000 RPM. Now take an engine that makes the exact same torque but has an RPM limit of 10,000 RPM's. Well engine #2 is going to make a LOT more HP because the multiplication factor is higher (more RPM's, doing the same work, but more times in a given time frame). So, realizing this, that having the same torque, but using it at higher RPM gives you MORE POWER) it makes sense to shift your torque higher in the RPM band because the multiplication factor grows. Also, being that the intent here is acceleration only, we are going to not give a hoot about any RPM's that we are not going to be in while maximizing our acceleration, so any RPM below our dropping point when we shift doesn't matter. In this case, your going to want to shift torque higher in the RPM range to make benefit of the higher RPM multiplication factor and too hell with any unused RPM's other then what we are trying to accomplish (GOING FAST AS STINK).
If we throw out traction issues and driver error, the higher horse power car (bike, go cart, plane, etc.) all other things being equal will ALWAYS kick the low RPM high torque cars ass in a drag race. Now lets throw real life issues in this mix like TRACTION and it's a different story as to what the result at the end of the track will be. But on paper, HP rules, high torque at low RPM has more fun factor and gives a much wider range for error such as missing a down shift, or even not having to down shift, and it is easy to modulate steady torque at low RPM then it is explosive torque/power that comes on abruptly at higher RPM (READ: TRACTION ISSUES).
Sorry for taking this thread off topic (but not really [confused]). If you want a hollow muffler, then go for it, these engines have enough torque down low that the power loss won't be missed. And it's important that we all love our bikes, be it visually, the way it rides, and the WAY IT SOUNDS. I've blown a big part of my day so that peeps understand whats going on, not too change their minds on what exhaust to run, just so they understand how it works, the correct terminology, and understand the gains and losses.
I should have made a seperate thread lol.
~Mike.......
