EFR vs GTX
BW EFR vs GTX on how freely the turbine wheels spin. GTX spins a lot more freely than the EFR ***by hand****
Much wind from a small turbocharger
Here You can get an idea of how much air is blown through a charger of an old truck.
Big Block Twin Turbo Chevy II - Fresh Start Up
550ci Chevy with Precision Pro Mod 88's
Cosworth Subaru Borg Warner EFR Turbo Test
Cosworth USA ~ Testing of Borg Warner EFR turbocharger on the Dyno at Cosworth USA (Torrance California ) with a Cosworth Subaru EJ25 , 2.6L engine. The External wastegate in this test is blocked off and not used as the EFR features an internal wastegate.