- Mar 16, 2007
what is the difference between a mechanical powervalve and an electric powervalve? :think:
steve.emma said:the difference is in the way they are controlled, i.e. a mechanical powervalve normally use a centrifugal governor to move the valve. an electric powervalve use a electric stepper motor to operate the powervalve.
rmc_olderthandirt said:What bikes have an electric one, and why?
yep i agree with that. having a external powervalve actuator that is electronically controlled is a much better idea in terms of maintainence and performance, it also has fewer moving mechanical parts.When you control the valve electronically, you can tie it's movement into multiple events like load (usually via TPS), ignition advance, and rpm to give it a fairly sophisticated opening curve. The power could be made much more usable once you get it sorted out. With a mechanical only system it generally follows rpm, and opens the same time regardless of operating conditions. Better than no powervalve, but far from optimum.
I'm not sure that Honda ever achieved a useful advantage on the CRs, but I am sure that it was an avenue worth persuing.
HubertGarfunkleIII said:supposedly they never did get their electonic powervalves fully sorted out from all the reveiws I have read they just dogg the CR's :| . What is an RC valve and what does it do? was that something else only honda was doing?
76GMC1500 said:An RC valvle is just the name Honda gave their electronic power valve. They did get the valve fully sorted out. It is quite reliable, quite effective, and doesn't seem to give owners half the problems of mechanical valves. The thing holding the motors back is the porting, not the valves.