What kind of coatings are on the rotors of our superchargers?

Epoxy.

The 5th Generation Superchargers incorporate an innovative rotor coating that allows for tighter internal clearances compared to previous applications. These tighter clearances allow for increased supercharger efficiency and performance, resulting in improved horsepower and torque at lower engine RPMs.

SUPERIOR Gen V SUPERCHARGER
The heart of the supercharger is a new "high twist" rotor design developed by GM Powertrain, in conjunction with Eaton Corporation. This design is more efficient and provides more airflow than any other OEM helical roots-type supercharger. While the revised helical rotors are new.......


I have heard that the new coating is teflon.

So the gen 3'* are epoxy and the gen v'* are teflon?

Hmmmm.....


So if water injection is bad if done before the rotors on a Gen 3 because it erodes the epoxy coating then I bet with the teflon coating it might work fine to inject before the rotor with a Gen V.

Exactly what I was thinking, because IIRC the 6-71 and 8-71'* are teflon coated, and they have fluids injected through them all day long.....

Nope guys the Gen V has abradable wear coating. You can not run water injection threw them you will loose rotor efficency

If that'* the case then I will have to abandon the water injection system. :(

BS, Paul. Inject post-rotor. Port the LIM for it. Install a temp sensor/gauge at the same time.

Sorry to bring this up again but I thought of something. If water is being injected into the Lower intake manifold and the boost bypass opens up wouldn't you have the same problem with water getting on the rotors. Or would it evaporate in time?