The title if the post is self-explanatory. What does this treatment do (besides lessing of the rotating mass). Is it soemthing like for dragcars only, or would a streetcar benefit from it? How does it affect drivability? Thank you all for the help.

 

It would allow the engine to spin up faster. Essentially knife edging the crank allows the counterweights to pass through the oil fog in the pan with less drag by decreasing resistance as they pass.

 

basicly, the crank counterweights take shape of a knife blade,, angled...

This is usefull on alot of older motors... the crank on the VQ doesnt really need it, its pretty well designed...

but it will help cut through the oil better... but it has to remain ballanced... so it can be hard to do

 

And for naturally use not FI torque goes down with this mod.If you revving 7500+ maybe it is gonna work.

 

Low End torque, sure... goes away some... Same with a light weight clutch and flywheel set ups... but, it is all made up in the high end...

Race cars arent exactly made to make power or even be at 1k-3k RPM's...

So if you are really looking at building a motor for racing... you can think about it... but, the VQ's crank doesnt have that much extra to shave off...