Roller Rotary

[low compression]

Im not an expert on bearing technology, but im not sure a bearing of that kind can handle the load against it as well. If it was a good idea im sure the small block chevy would of had a crank bearing like this a long time ago. Only reason i meantion a s.b.c crank is because we all know that engine gets all the minds in the world wanting to better it.

[vex]

Originally Posted by low compression

Im not an expert on bearing technology, but im not sure a bearing of that kind can handle the load against it as well. If it was a good idea im sure the small block chevy would of had a crank bearing like this a long time ago. Only reason i meantion a s.b.c crank is because we all know that engine gets all the minds in the world wanting to better it.

I don't think that's correct. Racing teams look to do this for removing friction, however using such bearings causes another issue: Survivability. This is an interesting read: Link

If it goes, what's to stop it from having the needle bearings clogging the oil passages? Where as compared to a regular journal bearing, if it fails, what's going to clog the oil passages?

[C. Ludwig]

Originally Posted by low compression

If it was a good idea im sure the small block chevy would of had a crank bearing like this a long time ago.

They are. Needle bearings for cams and crank shafts are common place in high end circle track engines.

[sickofpistons]

Originally Posted by low compression

Im not an expert on bearing technology, but im not sure a bearing of that kind can handle the load against it as well. If it was a good idea im sure the small block chevy would of had a crank bearing like this a long time ago. Only reason i meantion a s.b.c crank is because we all know that engine gets all the minds in the world wanting to better it.

The reason they didnt have one for the S.B.C or any other piston motor was because they couldnt hold oil pressure because they were a two piece design. They have them now in high end sports cars like the {bugati} i geuss is how its said? I think this needle bearing design would increase response and horsepower do to less friction. Its like hydraulic cam vs roller cam. If there was a way to machine these bearings for the 13b, would you have to mill down the e-shaft or bore the rotors and stationary gears?