V-valve

Boit4866

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What exactly is the Kawasaki V-valve? All I can is that it is for emissions, power, and a good running engine.
 

Scrubcadet10

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I'd like to know also, my grandfather's mule sx has an FJ400 engine and on the cover is says OHV V-VALVE
 

Boit4866

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I’ve searched the internet for any info and get nothing. I wonder if it refers to the valves spinning slowly as the engine runs to keep the seats clean? Just speculation.
 

StarTech

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I think it is more of a play on words than anything else. Now the valves do have dish shaped heads. But it appears to more referring that the valve train design is taken from the v twins OHV valve train design. It also can refer the way the vortexes are created by the cylinder head. Other than that I see nothing special about the valve train.
 

StarTech

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Variable valve timing?
With small engines about the only way to have variable timing is variable duration and that only changes the duration that valves open and stay open. Which give a responsive engine but I haven't that in anything under six cylinders personally.
 

cpurvis

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With small engines about the only way to have variable timing is variable duration and that only changes the duration that valves open and stay open. Which give a responsive engine but I haven't that in anything under six cylinders personally.
Just guessing. I see no use for VVT in an essentially constant speed engine.

I've never seen an engine that had variable duration but I have a 4 cylinder that has VVT (Acura 4 cylinder).
 

StarTech

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Just guessing. I see no use for VVT in an essentially constant speed engine.

I've never seen an engine that had variable duration but I have a 4 cylinder that has VVT (Acura 4 cylinder).
Well the 1979 Chevy Malibu small block V8 I had did but it also had a 700R4 transmission installed too. I won one bet with AAMCO transmission shop when I went for fluid and filter change. The manager argued with me that I didn't have one in it as they didn't come with them. Boy lunch was plus I got a free fluid and filter change out of that.

I personally knew both were true as I was the one that installed them. I actually installed a mild racing camshaft so the variable were kinda necessary to reduce the possible lope at idle. I actually was averaging 22.6 mpg with a cruise of 32 mpg. Not bad for a car that only claim 16 mpg highway.
 
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