Quote:
Originally Posted by Buddy Seat
Exhaust at first mimics what is happening out of the ex port, then depending on ex size OD & baffles bounces back & it then finally released out..
But I suspect you already have a good handle on this whole event...
|
OK, it was a rhetorical question, somewhat. I Feel like I have a good handle on the theory of reversion but what I know has been gleaned from reading the VTF. I'm not a builder, just an enthusiast. It's nice to hear another way of describing the complex events that make our bikes GO. Evey once in a while I'll read one of these threads and a light bulb comes on in the ol, noggin.
One thing that has been interesting to me lately is my learning that the same principles apply to intakes. There is a relation of the size/length of the intake manifold that will compliment the engine at certain rpm ranges. One problem is that in order to get maximum performance in that regard, the intake needs to be considerably longer than we see in conventional setups. I have not seen even a photo of one of these but the theory makes sense. If you can time the pulses in the exhaust, you can time (or tune) the pulses in the intake. I've read that some of the J bikes have computer controlled variable volume intake manifolds to accomplish this same idea.
Can't wait to see what the future holds. Variable intakes & exhausts. Maybe the they would have moving parts looking like a trombone playing a song as the ecm decides what is the best length for each run condition.
Add, electro-magnetic (or pneumatic) valves with variable cam timing & lift to keep the motor in it's sweet spot in all conditions of throttle settings and rpms. No cam involved, just computer controlled valves. I'd bet that would be an UGLY motor but once you ride it ...
OK back to reality, ain't never gonna happen to an HD motor. The money that it takes to develop this stuff is in Formula 1 cars.
.gif&contenttype=gif "Wheeldock.com")
