Allmarine
Member
I had a 2013 with Roush SC and the smallest pulley from VMP, minimal whine. Then got a F150 Shelby with the Whipple, lots of whine. Just got another 2013 with a 6.6L Livernois Powerstorm engine and Roush SC, can't hear the whine at all. My understanding is that the design of the vanes in the TVS (Roush) are different to the Whipple to actually cut down on the whine. Unfortunately I like the whine. Has anyone done the cog thing recently, are these guys still around.
