When I start my engine up I get a rubbing or scuffing noise which can be heard inside with the windows up. Under the hood it can be heard around the valve covers but this does not sound like rockers to me since it is NOT a ticking or knocking sound.

This sound is not very loud at all and can not be heard when the engine revs above idle. The noise goes away in about 5 minutes once things warm up.

I have forged .030" Mahle pistons which some say may create piston slap.
Does this sound like piston slap to you guys?

 

posible bearing push in the clutch see if that affects it if it does could be trans input ber. pull off the belt spin your acesorys by hand feal for cruncy grit. could also start without belt see if sound goes away

 

Clutch has no affect.
Any other thoughts?