You buy a late model blower.
Just make sure you buy a good one!
What are some red flags to look for when checking out a late model super charger?
Porting for certain. You need to look at who did the porting, rebuild, ect. Your best bet is going to try and find an unmolested one and have it done right. That would be your safest bet
How easy should it be to turn by hand? Should it spin, keeping its momentum for a few rotations?
Another thing to note is that late model blowers had a spring loaded coupling between the nose and rotor pack. This means if the blower is a late model and unmolested you can turn the pulley about 1/8 of a rotation before the rotors start to turn.
I know the first time that happened to me I almost went off on the person who sold me a good condition late model.
If there is binding at a point, what are my options. New Rotors?
Another thing to note is that late model blowers had a spring loaded coupling between the nose and rotor pack. This means if the blower is a late model and unmolested you can turn the pulley about 1/8 of a rotation before the rotors start to turn.
I know the first time that happened to me I almost went off on the person who sold me a good condition late model.