I got the bov in and its sounds great. At higher rpms it has a slight flutter but in the lower rpms it flutters really bad. Do I need to harden the spring to get rid of flutter or soften the spring I haven't really messed with it a whole lot yet because I didn't wanna do to much before asking. At peak boost it makes a real quick flutter then full release like pssh pppsssssshhhhhh is that okay or should there be NO flutter at all. BTW the valve is greddy type rs w/ anti stall attachment.

 

You might be backspinning your turbo. Check your vac lines.

 

Take a photo of your install we can better help you if we see what you've done.

 

Thats not possible, i think you mean slowing. But still not it. I sounds like it needs softened. Most valves will have some fluttler at 5psi when you are running 20+ psi since its hard to adjust for both. Some valves like the HKS SSQV have 2 adjustments that keep it from doing that. Not sure if the GReddy does or not, i know they have a dual vac line in the back

 

Anything is possible that's why I said take a photo so we can see. It could be a simple confusion of the lines.