power valve

[james350b]

I am a newbie so forgive me for all the stupid questions i am going ask! That being said, what are power valve cylinders and if they are good for banshees?

[jbooker82]

The power valve is like haveing a varable hight exhaust port. The higer the exhaust port the more hp you can build but it will be at a high rpm. A high exhaust port causes a poor midrange. So you have this valve the closes the exhaust port and lowers the port hight. It gives a good mirange. As the RPMs raise the valve raises, raising the exhaust port wich give a better top end.

 

 

It allows an agressivly ported cylinder (Like a Drag Port) a stronger midrange. Something that isnt achievable by porting alone.

 

The Trinity Cheeta is the most common power valve cylinder. The Cheeta cub is its baby brother with no powervalve.

[fastquad02blaster]

Do some research on the RZ 350. You will learn quite a bit about powervalves and the origin of the banshee motor. I think it's the origin anyways.

[james350b]

thanks!