Hi !
from my experiance with roots blowers i can note :
in my personal opinion ... Roots blower need boost control with bypass-valve when used at high compression NA engines , to keep the boost low at low to medium engine speeds up to 4500 RPM , i dont like weak stock conrods looking out of the block !
the centrifugal charger like Vortech-V3 is doing exact this boost curve without external boost control !
!
So for an build engine with rods and pistons the roots charger is the better option for low end tourqe and higher power
!
Roots blowers without integrated intercoolers get high chargtemps , not good for power !
Installation is a bit tricky for external heat exchanger , water lines and waterpumps , also a + point for the Vortech Centrifugal Charger , here you can use a simple air to air intercooler in the front !
regards ASH@IPF-TUNING