Need a torque spec, 986 Boxster

Anyone have the torque spec for the motor mount studs that go into the chassis? When I pulled those nuts 3 of the studs came with them. I can't find a torque spec for just the studs. 7mm heads. 
 

Background: I'm trouble shooting again. I just did the motor mount on the Boxster but I'm still having symptoms like it's bad. 3000rpm vibrations and at high load cornering the whole back half of the car is vibrating. It comes on like a light switch on higher G corners. 
I had the 3k vibration before I replaced the mount but not the cornering vibration. So I did something wrong...

I'm sure aazcd has a better answer but I'm pretty sure I always just torqued mine to whatever the nut torque was and never had any issues. Have you checked the wheel bearings and CV joints? Could also be the trans mounts maybe? A bad dual mass flywheel can cause some of that vibration too but shouldn't be sensitive to lateral acceleration.

Edit: when you replaced the mount did you replace the side travel limiter rubber spacers as well?

Good to know. I just tightened them good and tight. Maybe something slipped. 
The noise happened suddenly and I don't have wheel play so I don't think it's bearings. Could be CVs but again, it suddenly happened. 
Rubber spacers are okay, I just put them back. They were upside down before actually. 

Bump for another question: do these engine mounts need to be preloaded or anything?