There seem to be different sound levels that u can do.

What are the pros and cons?

 

Theres a sound adjustment?

i thought it only adjusted spring stiffness?

 

nope, it's the blow off valve

 

Pros: The louder the BOV, the more teenyboppers you will attract at high school parking lots
Cons: You may also attract the child safety committee

mike

 

I know of the nut and bolt out on the back that's used for adjusting the spring tension or whatever. Tighter - holds more boost, loose - blows off at lower boost.
Mine isn't that loud either. I think it's adjusted too tight. My friend has the same one on his Supra and it's LOUD.

 

what's with the mode that flutters?

 

wouldn't that be "too tight"?

 

Doesn't it "flutter" when you have compressor surge? Isn't that a bad thing?

 

but it sounds cool man! screw turbo life!

- PJ (why bother having a BOV at all...)

 

i think when it's hard, the pressure wave heading back to the turbo has to be stronger to push it open, hence the BOV opening less.. less open = more hiss!

 

What's the best setting for the Spring Adjustment (default seems about midway).

My unit came with only Jap instructions and I don't want to cause any damage to the turbos!

 

my buddy adjusted it so that it makes no noise.

so he must be doing damage...