sharpshooter

iTrader: (9)

I run the new style bullet enclosed procharger bypass currently at 13 psi at my shifts. This valve is brand new. It seems to work great but if I rev the truck in park or if I run it up in the rpms and close the tb and coast.I hear the proper woosh but as the rpms come down I hear a flutter through the D1SC.This is the the same thing my normal proflo has done for years but changing to the bullet I thought it would not flutter.Also vacuum source is good and bypass opens fully. I'm thinking now it is a flow issue (bypass exit to small in charge pipe)because I can have it make the same flutter if I take the bypass totally off.

Do I need to upgrade to big red or is the flutter back through the blower not an issue?

Bob@BruteSpeed

iTrader: (16)

We've eliminated that fluttering sound by hooking up the bypass valve to the hvac (ac) line, instead of having it hooked up to the power brake booster. You might give that a shot. Bob