We have been porting the SVT superchargers for over 6 years now and through experience, and porting as many Eaton's as we have, studying them with R&D, we have found over 95% of the Lightning superchargers need front drive rebuild due to majority of you are or have been running an aftermarket lower pulley. We actually have had 100's here at our shop and had have seen several with approx 18,000 miles on the unit need a front drive rebuild (after we had put it back on the truck and heard the noise)
We fully disassemble your blower and front drive snout and evaluate it's condition. All bearings and seals are inspected, rotors are checked for flaking and tip scouring.
The blower case is ported achieving the CORRECT balance of Low pressure to High pressure. (Low pressure meaning the inlet side and High pressure the exit side)
Careful attention is paid to ALL areas to achieve the Highest Airflow rates and still Retain case rigidity ----Designs are constantly being tested and updated to assure you the Largest HP gains available-- GUARANTEED. All Airflow test data recorded with a SF 600 SuperFlow Flow bench.
All Lightning Truck blowers have rotor to case rub.
I don't think I believe the first part