They are always spinning on the ones I've seen but the wastegate (valve) controls how much boost goes into the intake or maybe it lets less exhaust power the turbo in some setups.
Every one that I have ever seen (not 3.5 though) spin anytime you give them some gas.
You 'could' stop the turbine on cold side with finger but I wouldn't recommend it for finger reasons or turbine wheel etc damage.
Every one that I have ever seen (not 3.5 though) spin anytime you give them some gas.
You 'could' stop the turbine on cold side with finger but I wouldn't recommend it for finger reasons or turbine wheel etc damage.