So, I have a 2002 lightning that is not making any whine/boost. I checked all vacuum lines to make sure they were good and replacedall gaskets that have to do with intercoolerand supercharger. I put a new bypass actuator on the supercharger. I then sent the supercharger off to steigmeyer to have it fully rebuilt but still doesn't work. Now, I'm thinking that it has something to do with the lower supercharger pulley that is connected to the crank pulley. So, when the truck is crunk up the supercharger belt doesn't move at all as the lower pulley isn't spinning. I have to give it a lot of gas before the supercharger belt starts moving and it moves very slowly. This of course leaves the supercharger unable to make boost as the rotors aren't turning fast enough. 😒 Does the lower pulley have a clutch that's supposed to engage or something as the crank pulley spins? Thanks

 

To my understanding all the pulleys except the crank should spin freely. Not too knowledgeable on the lightning but I know a little about the triton V8s. Take your serpentine belt off and inspect all your pulleys. To me it sounds like one is bad.

 

The belt should spin all the time, so found the following that might be helpful:
https://www.svtperformance.com/threads/00-stock-lightning-supercharger-doesnt-spin.774765/

and:

 

Thank you much

 

Could I ask why you did not feel the Crank pully had to turn the super charger before going to all the other expense and effort.
The pulley is mounted in rubber and has deteriorated after 21 years..
The charger is over geared and has to turn more than 10,000 rpm to supply enough air under positive pressure inside the intake tract to overcome the intake needs of the engine or there would be no advantage to using it.
Actually boost PSI is the excess pressure in the intake that the motor cannot consume at any given moment.
Most after market charger pullies are hard bolted to the front of the crank so this does not happen.
All vacuum lines are fitted with check valves because the intake is under pressure when the charger is making boost.
I'm sorry to bring this to your attention but you have to think more deeply and put things together a bit better..
Good luck.

 

If everyone where an expert like you, then we wouldn't need a Forum to ask questions.

 

You need to try using a little common sense!
That's all it takes.

 

Well, I just didn't feel that the crank pulley had to turn the supercharger because it just didn't come to mind🤫🤣. However, thanks for your input and the knowledge that you've provided. I appreciate it.

 

Well, problem solved. It was definitely the lower pulley that needed replacing as the rubber within the pulley separated from the pulley itself. I put on a new aftermarket metco hub/pulley and it works great again.