Originally Posted by
Coheed Piston speeds on the SR at 8000rpm are getting pretty high. 10000rpm is about 5700fpm. or 1000fpm more than 8500rpm. I wonder how well a turbo vvl handles those rpm. I rev out to 8800rpm now, which is 4800fpm roughly. That's gotta be a ton of stress, considering my pauter rods can't be light.
Slightest bit of detonation will see the end of your bearings!
The problem is there are not many quality bearings availabe on the market for our SR's.
The acl race series stuff has 3 layers of material and the white babbot layer is easily damaged exposing copper which will pick up and heat up easily. Before you know it copper will ball up and spin your bearing and bend your crank.
To the O.P spinning to 10k on a square engine like the sr is not reccommended. Im not sure if you have heard a VE at sustained 9k, it doesnt sound or feel right, the harmonics just dont like to be there for too long!