I don't know is this is a simple answer or not, but I have the treadstone turbo and in a free rev my kit does not release the pressure in the blow off valve. I thought for a while that maybe its how the tc was setup or something but on youtube theres a couple videos with tc's revving and I can here thier blow off valves going off. Any info?

 

Mine doesnt either unless i rev for several seconds at a time. so i dont do it.

 

You're not making boost, so there's no pressure to relieve.

 

You're not making any boost, a lot of turbo applications won't unless they're under a load.

 

my hks does!! haha i love um loud!

 

I can do it with an HKS if rev a few times, but eh... what for?

 

exactly i did it once when someone wanted to hear the bov.

 

Alot of my friends have evo's and sti's and I know thier blow of valve goes off when you rev, just always thought it was more intimidating than just exhaust noise

 

i personally love it when people rev at me, i rev back and when we go at it. out of nowhere you hear the BOV.

not that i race or anything...

 

haha yeah i feel you aen.. same here!

 

Well cuz evos and stis are boosting much more than us, and i believe they make boost sooner.