ok, in one of these forums (can't remember which one, i think it was Prelude) someone told me that a knofe-edge crank it a bad idea w/ turbo. everything else i've ever heard/read has said it's a good idea b/c it lightens the cranks and helps reduce turbo lag like a lightweight flywheel etc etc. since thise is the FI forum, let me in on what you guys know

 

it useful for n/a applications

 

Also it cuts down on oil vapor in the oil pan.

 

but why do people say not to do it with hondas, or not to do it with turbo>?

 

any crank which sees hgih rpms like the honda vtecs, needs to be strong, by knife edging it weakens the crank considerably. Only racers usually do this since the car is not daily driven, etc.

greg

 

Its much cheaper and safer to go with a lightweight flywheel. Only do the crank if your looking to shave off every last bit of rotational mass.
Also, the crank DOES NOT run through the oil in hondas. On top of that, most Hondas have factory windage trays which just about eliminate interferance with the oil. Knife edging is popular in the domestic croud, where the actual crank runs through the oil and creates a lot of resistance and frothing of the oil. On a honda the only advantage would be weight. And really, the sharp edge of the crank does practically nothing. Its just the removed material.