Not many people have helped that i've asked but can you get your crank knifeedged at any machine shop or is there a certain type of machine that you have to have? My buddy was telling me I should get it done if I can, what exactly takes place when you get your crank knife edged. thanks
knife edging can be done at a machine shop but you should do it as part of the balancing meaning if your going to have your crank and pistons and rods all balanced then thats the time to do it theres also theories about knife edging were oil can collect in other areas of the crank that can affect the performance do some reaserch on it before you knife edge the crank. me if rather go with a crank scrapper if its possible
Will it make a big difference performance wise if it is knife edged or not? what do you mean by crank scrapper thanks
and what the hell is knife edging anyways, also how do they lighten a crank???
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google search for knife-edging, check out the pictures...prety self-explanitory. If you want this done, you have to take it to a PERFORMANCE machine shop/engine builder, most engine rebuilders/shops don't have the necessary equipment.
For crank scraper, check out crank-scrapers.com

fortune cookie say:
better a delay than a disaster.
Balancing can be done on your rotating assembly afterward as long as the machine shop doing it knows what there doing, meaning they take off roughly the same off each counter balance. Also, I As far as oil collecting in other parts of the crank goes, thats total BS, there are no adverse effects like that. Oil is supplied to the crank throught the oil passages in the mains and the crank doesn't rely on lubrication from the wind created in the crank case at all.
i dont know how thats total B.S. this is just in theory as we both know we really cant see what happens inside the crank while actually working, if the knife edging isnt done properly it can collect on the sides of the counter weights, messing with the aerodynamics as you did post that there is windage in the crank case there has to be an aerodynamic issue there. and of course it might not mess with oil passages i didnt bring up anything about oil passages. Id go with a tear drop design if i could draw pics to show i would but thats what i mean about reaserching. im not here to contradict just to help someone who has a question if your wondering how i would come up with something like this yes i have taken engine design with a couple of other engineering classes this doesnt prove much but at least i brought out an idea so that maybe someone can go in the right direction.
IIRC when i pulled my ecotec pan it already had a winidage tray in it the crankshaft never touches the oil in the pan. knife edging would still be good yes but it would have nothing to do with the oil in the pan.

The one, the only, ME.
TOYOTA 24 S wrote:i dont know how thats total B.S. this is just in theory as we both know we really cant see what happens inside the crank while actually working, if the knife edging isnt done properly it can collect on the sides of the counter weights, messing with the aerodynamics as you did post that there is windage in the crank case there has to be an aerodynamic issue there. and of course it might not mess with oil passages i didnt bring up anything about oil passages. Id go with a tear drop design if i could draw pics to show i would but thats what i mean about reaserching. im not here to contradict just to help someone who has a question if your wondering how i would come up with something like this yes i have taken engine design with a couple of other engineering classes this doesnt prove much but at least i brought out an idea so that maybe someone can go in the right direction.
There would be no more oil on the sides of the counter balances than before the knife-edging. I've read tons on v8 forums and others and never found anything to lead to any dissadvantage of knife-edging. The crank case is much more turbulent in the crank case before and less when its knife-edged, it has a dramatic oil slap before and less when its been knife-edged. I'm not trying to be mean or rude I just dont want any rumors to start about bad things that can happen with a knife-edged crank.