I was looking at my S372 at idle the other day and noticed it dosent spin to fast or at all some times, was just woundering if anyone else noticed this?

 

Its a very large turbo, and you're a small displacement engine. It's not going to allow a whole lot of rotational speed because of your small exhaust energy at idle.

Nothing is wrong and nothing is damaged, you just have a big f**kin' turbo on a small motor.