Just wondering if anyone that has a built 2.0 or 2.3 etc, had their crankshafts knife edged, for better flow through the oil, and less splashing around, because if I get a built motor, id like to try it out, any imput is appreciated!

 

Also curious

 

Try Buschur, I think they do on their built shortblocks.

 

we did it to our race car in the 2.3L engine. we took so much rotating mass out of the rotating assembly (clutch, pulleys, accessory belt, crank), the car revved super fast. i haven't gotten to really put it to use though cause of the oil pump failure then the oil cooler banjo backing out.

 

yeah this place called borowskis racing(machine shop) showed me how they did it, and I was very interested in trying it, but wasnt sure if it was done on a 4G63 yet

 

I was thinking about having this done.....are there any con's to doing it? (i know what the pro's are)

 

http://www.ffwdconnection.com/butchercrank.shtml

 

wow good find, thanks, this answers most questions

 

Yeah good call, Darren does really good work.

 

I've done it on many in-line 4 cylinder Porsche motors and I love it. Helps with oil/windage and at the same time looses weight.

 

The other idea is to bull nose the crank but I think that was done on larger v8 cranks.

 

makes me wish I didnt rush my build. now i want to tear it down and do it all over again.

 

I have a gsc built 2.2 stroker that has a knife egded crank and love the way the car revvs with the loss in rotational mass. Only issue with this on a street driven car is the a/c kicking on slows the motor down so fast the IAC motor has a hard time keeping idle stable and its a ***** to drive with a twin disc clutch thats fairly grabby. i have to rev it up to about 2500 rpm to get it moving with the twin disc or it will grab and basically stop the motor since it has no inertia to keep it spinning.......

 

I did it on mine on my 2.3 build, as well as fully balanced my rotating assembly. I also eliminated my balance shafts, ac, power steering, and have a lightweight crankshaft pulley.

The car revs ridiculously well and I have no regrets doing it.

 

i think the main thing you have to wory about with a knife edged crank is it makes it very very hard to balance exactly right. I hade a eagle knife edged crank for one of my cars and before i used it i went to SEMA show and talked directly with eagle about the knife edge crank, they said they were a great crank but, the motor should be torn down every season to replace the bearings because since they take so much off the crank it is impossible to balance it as well as a stock crank. I dont know how much these other guys take off but that is the one thing i would be worried about, that and there is less rotating mass in the motor so lag might increase some because of the lost rotating mass and lessened load