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105 Posts
Anyone catch the Monte Carlo WRC last night? Awesome!! Anyway,
as I'm sure most of you already know, the cars are always making this kewl little chirping noise. I always assumed it had something to do with a belt, a suspension component, or even possibly the turbo.
As I was watching a stage last night, the announcer said something like "yeah..you can hear him decelerating (his words) as the blow off valve chirps...".
So this lead me to the conclusion that the strangely alluring chirping noise was the BOV letting off excess pressure when the throttle was released. I thought this was odd as all aftermarket BOV's I've heard make a prolonged sound like a woosh or a whistle. Now to the heart of the post:
Is that chirping noise on the WRC cars actually the BOV and if so, why does it make that type of noise? Extremely reactive solenoids? A vent muffler of some sort?
Would love to have the STI (once acquired) make the same announcement coming into a 25MPH corner at about 80....chirping and downshifting and drifting and left foot breaking and e-brake sliding and hooking up with all 4 biting leaving nothing but a bit of tire smoke and a 2.5 rasp in my wake (and maybe the echos of cheering air horns) !!!!!!!!!!
ok...got carried away there. (I know you know the feeling!!) Seriously, is the chirping the BOV and can we get a set up like that?
Cheers,
Scott
as I'm sure most of you already know, the cars are always making this kewl little chirping noise. I always assumed it had something to do with a belt, a suspension component, or even possibly the turbo.
As I was watching a stage last night, the announcer said something like "yeah..you can hear him decelerating (his words) as the blow off valve chirps...".
So this lead me to the conclusion that the strangely alluring chirping noise was the BOV letting off excess pressure when the throttle was released. I thought this was odd as all aftermarket BOV's I've heard make a prolonged sound like a woosh or a whistle. Now to the heart of the post:
Is that chirping noise on the WRC cars actually the BOV and if so, why does it make that type of noise? Extremely reactive solenoids? A vent muffler of some sort?
Would love to have the STI (once acquired) make the same announcement coming into a 25MPH corner at about 80....chirping and downshifting and drifting and left foot breaking and e-brake sliding and hooking up with all 4 biting leaving nothing but a bit of tire smoke and a 2.5 rasp in my wake (and maybe the echos of cheering air horns) !!!!!!!!!!
ok...got carried away there. (I know you know the feeling!!) Seriously, is the chirping the BOV and can we get a set up like that?
Cheers,
Scott