25 years of sportbike development

Tmall · 08-23-2009, 12:29 PM

Cylinder filling is just about as efficient as it will get.

It has a giant pump pulling the air in. Aside from forced induction, you don't get too much more power from head work.
If all it took to increase tq was to polish your intake ports and have the intake velocities be spot on, wouldn't the manufacturers be doing it?

I suppose decreasing losses would count, suzuki did it on their bikes by reducing pumping losses in the cylinders themselves.

Falls under the law of diminishing returns.

Dave · 08-23-2009, 12:34 PM

i actually was referring to forced induction. and kawasaki already hand finishes their intake ports

08-23-2009, 12:34 PM	#2
Dave Chaotic Neutral Join Date: Feb 2008 Location: Cherry Hill NJ Moto: GV1200 Madura, Hawk gt Posts: 13,992	i actually was referring to forced induction. and kawasaki already hand finishes their intake ports __________________ TWF Post whore #6

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08-23-2009, 12:29 PM	#1
Tmall Aspiring Rapper Join Date: Nov 2008 Location: Halifax, NS Moto: '12 CB1000R Posts: 3,569	Cylinder filling is just about as efficient as it will get. It has a giant pump pulling the air in. Aside from forced induction, you don't get too much more power from head work. If all it took to increase tq was to polish your intake ports and have the intake velocities be spot on, wouldn't the manufacturers be doing it? I suppose decreasing losses would count, suzuki did it on their bikes by reducing pumping losses in the cylinders themselves. Falls under the law of diminishing returns.