I've was next to an STi in traffic once that had a BOV that sounded like the pressure relief on a semi truck's air system. RICE. I never heard the BOV on my Mazdaspeed 6, so I know it can be done quietly.
MazdaSpeed 6 = 276HP, not far off of the STI's ratings. And, to clarify, the "power and size" of the turbo have very little to do with the sound of the blowoff valve. The sound created by the BOV is dependent entirely on the BOV itself.ya but the power and size of the turbo in an STi as compared to a Mazda 6 is night and day....so i guess seeing as we are now comparing a Forte Koup to an STi i guess it can be done but... i too love the sound of the BOV
Superchargers can be equipped with BOV's, and for smaller motors like what's in the Forte, a supercharger won't provide as much power as a turbocharger would for the same price point.Also another way to go if you don't want that whistle is a supercharger. It whines but will never blow off due to it being integrated into the system. also you won't have to worry about over boosting, the boost is very reliable in a supercharger, and you will get crazy low end torque and good hp.....but if you want a turbo, 1. a recirculating bov, takes the excess boost and instead of venting to the air it goes right back into the intake pipe after the filter, before the turbo, and a atmospheric vents right to the atmosphere, some of the recirculating you can hear...barely, but there is no such thing that i have heard of a "quite" atmospheric bov, so in my opinion recirculating is the way to go....the good thing with the forte is that well in my case on the 2.4 sx there is no MAF sensor so it won't mess with the fuel mixture which ever way you go... because on some cars that do have MAF sensors you have to do a blow through type MAF on the cold pipe, so that it measures the air flow coming in after the blow off valve, because you lose air when it blows out the excess...so if you do have a MAF i would stay with the recirculating .....
true .. superchargers are generally more expensive , and BOV's can only be put on centrifugal Sc'sSuperchargers can be equipped with BOV's, and for smaller motors like what's in the Forte, a supercharger won't provide as much power as a turbocharger would for the same price point.
oh you don't have to tell me thatya this is true (im a turbo kinda guy) but he said he didn't want a blow off "noise" so why would that be such a bad thing...and you can get a good amount of hp and torque if you have the right setup and pulleys....
my friend got a german BOV in his Corolla S, sounds positively mean.I just dont like the high pitched whistle I hear from some turbos. If I can make the engine sound as mean as it performs, then I'm fine with a BOV if it doesnt whistle.
I will ask him this weekend when I see him and get back to you.Awesome, thanks guys for your answers. Didnt know I'd get so many lol. Corytate, do you know what company makes that BOV, if it sounds as mean as you say and they make one for the Koup I may buy it.