zero Posted October 7, 2011 Share Posted October 7, 2011 So I was reading about KTM's new 250cc Moto3 engine just now. This engine, like many high performance 4 valve singles, has one exhaust outlet per valve, or two per cylinder. As seen below. Since all of the talk on here about 180 degree headers and the like, I was wondering whether it would be beneficial for an engine like this to have different length primaries. This thing is tuned for a pretty specific, high rpm being a pure race engine, so you could tune the length to evenly space the pulses for a relatively narrow rpm range. Would this speed up the average exhaust velocity? Could some scavenging effect be achieved? Would it sound like a twin? Just some thoughts. Quote Link to comment Share on other sites More sharing options...
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