mpi supercharger

[rockapex]

I bought stage 2 mpi super charger I'm having trouble with pulleys coming off and tried different pulleys and never got over 10 psi of boost any suggestions

 

[nate007]

They've got a service builetin for their pulleys listed on their website I believe, and it includes heating the pulley, installing it hot and torquing it before it cools or something..
That style of pulley hub isnt generally designed to handle the rpms of a snowmobile application, so pay close attention to that service buletin or risk losing an oil tank...

 

[rockapex]

thanks