In SAE correction on a dynojet the VF570 kit put down a respectable 450 wheel horsepower at 9 psi with Evosport headers and an exhaust system. The issue with many of these supercharger kits is that they are a one size fits all but not call motors are equal. Break in, fuel, how it is driven, elevation, etc., all affect it. Apparently the default VF tune which comes with the kit on this particular car was running a bit too rich.
How rich? Well, apparently quite a bit on the rich side as look at those gains through the curve. It would be nice to see the air/fuel graph not blocked out but that might open up a can of worms and create friction between the two companies. Regardless, the owner said he is happy and that he now understand why the fuel tank would empty so quickly with the VF tune. Nice work by [email]Sal@evolve .
Graph is below.