Hello all,
I just installed the Greddy Type-S bov with single spring mod but somehow I barely hear the whistle sound. It's not that as loud as I expected. Any infos/help would be highly appreciated.
Thanks~

 

Put the other spring in and the sound will be times 10. I recently took the second spring out and I cant beleive how quiet it made it.

 

watch you dont get flutter doin that....

 

I used the larger spring and now take out the larger one and put in the small spring?

 

Try tightening up the spring... that will help, but i will be the first to chime in, you dont need it for the sound. As long as its working properly, who cares about the sound

 

..

 

No I meant if you want the sound, use both springs. Mine used to be really loud but now with only the large spring its pretty quiet.

 

put the other spring back in.
ie , use 2 springs
https://www.evolutionm.net/forums/sh...d.php?t=113527

 

What is considered "flutter"?

 

turbo flutter cause the bov is to tight and not opening under slight throttle changes.. give works a call.. they seem to be the only company thats addressing this prob.. they recommened the the single spring mod with the second vacuum line hooked up..

 

Gotcha, I thought you meant bov flutter.

 

I have mine in with the stock airbox and single spring mod and since I put on my test pipe and cat-back its quite loud
not deafening like it would be if you run open air box or have an intake but its loud

but you definitely want to do the single spring mod
as long as it works.....who cares about the sound

 

While we are on the subject what is the appropriate sound for this bov? A whoosh squeak or a chute chute?

 

sorta like a whistle

 

So does the chute chute sound mean it's to tight?