hey guys i have a h22, fmax manifold gt35r, and a hks ssqv w/ the gay purple insert, and i recently installed a 4inch intake pipe and 4 inch filter, (used to have 3) and my bov sounds really odd, and i belive it's surging, so i put the three inch filter back on and it went away, any ideas of what's going on.

 

where is the bov vacuum sourced from?

 

its own deidcated line on the side of the intake manifold

 

the weird thing is it only changes with the larger 4 inch intake and filter

 

it makes a deep ba..buff sound (lol) after the bov goes off

 

I thought compressor surge was the cool but damaging sound you hear. Usally sounds like a reptitive fluttering sound. I get that sometimes if I boost part throttle and only build a little bit of boost.

 

yeah thats compressor surge, but mine make a diff sound wondering if anyone knows what it is

 

but the surge or sound goes away when you take the filter off?

 

no the sound goes way when i put the 3 inch filter back on.

 

okay i think i figuired it out, for some reason when i change either the length, or diameter of my turbo inlet pipng it changes the sound of the blow off valve, a 4 inch pipe and filter sound like a quick turkey gobble, and a 3inch pipe and filter sounds like turkey flutter, kinda like a supra, and just a filter directly on the turbo sound like a tial bov.

 

you sure its not surging but just changing the tone of your bov?

 

had the same issue, only mine happened when i went from a mini-ram to a top-mount turbo mani. correct me if im wrong, but the way i see is, if the BOV is working then it shouldnt be hurting anything right?