Super charger flutter
 

After installation had excessive flutter noise seemed to be coming from by pass
Valve. changed vacuum set up and thightend by pass all the way and backed off 1 turn .it does not flutter at idle anymore but can hear it when accelerating and when it shifts it stop for a second and then starts again
Has anyone got ideas what's going on?

what kit are you running?

running a bypass valve? which one, and what pressure is it set at?

what pressure are you seeing the flutter at?

stage 1 and i don't know which bypass it is I got it last month from gtm and as soon as I accelerate it starts to flutter until it shifts and then starts again .
before it would clatter at idle we got that to stop.
I am a little disappointed , it really sound horrible.

ps the pressure is 8 I belive the flutter stats at 1

Mine was doing that, had to lossen it a bit more. I hardly hear it now, ever so slightly sometimes when on cruise control.

You've got the adjustable Turbosmart bypass valve. You need to adjust the knob until there is no flutter.

Also, make sure that you have a clean vacuum source for the bypass valve. If the vacuum source is on the wrong side of the EVAP solenoid (which opens and closes in a pulsating fashion), then you will have problems like you are describing.

another thing to add is, if you're running a boost gauge be sure not to use the same evap hose