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blow off valve


HPballer76
02-11-2007, 10:21 AM
this is kind of a dumb questian but if i put just the blow off valve in my s10 without puting the turbo will i get the sound of a turbo without actully having one?

silicon212
02-11-2007, 10:31 AM
No.

The turbo is what produces that whine - the very high RPM of the turbine/compressor is specifically what produces the whine. Remember that those things can top 90,000 RPM.

Why would you want that sound without the power that goes with it? That's a lot like some of the ricers that you see that have air-powered shifters - cars that my Caprice will blow out of the water, yet they still have those air shifters - they sound COOL! not

ponchonutty
02-11-2007, 11:13 AM
No, the blow off valve doesn't make the "whine" but the psst sound when the gas pedal is released.

Anyway, no it won't

HPballer76
02-12-2007, 07:01 PM
i would want the power to go with it but i dont have the money for the full turbo kit so i didnt no if i could just get the sound.

ponchonutty
02-12-2007, 07:56 PM
Well sorry but you can't do it. That sound is the sound of pressure being released off of the turbine.

Blue Bowtie
02-13-2007, 02:31 PM
Is that the same thing as a "wastegate?"

I have seen what will make that sound listed in some of the "import tuner" catalogs and sites. A turbine blade-type "spinner" mounted in one of those fart can exhaust tips. That's the epitome of Radically Improved Car Equipment. It was probably within the last year or two I encountered those.

ponchonutty
02-13-2007, 07:24 PM
well, yes and no. The blowoff valve is part of the wastegate but actually isn't needed. The idea of it to release pressure is but like on my SRT4 from the factory bled off inside the downpipe and you didn't hear it. Once I added stage 1 I got a block off plate which causes it now to make that pssst sound when I shift.

That "turbine" thing you see that you clip to your tailpipe doesn't make that sound either but instead makes a swirl sound sort of like what a turbo sounds like when you are building pressure. They are simular to those little hand whistles that have that little propeller inside.

turbotwo1
02-25-2008, 08:02 PM
The blow off valve is not part of the wastegate. Some cars like the old GT-4's never came with a blow off valve. The blow off valve realeses air preaserue when you lift off the throttle so the resulting shock wave of the air hitting the throttle plate dosent bounch back to the turbo and atop the blades from spinning. The wastegate allows air to bypass the hot side turbine to limit the amount of boost the turbo produces. The only way to cange the way a wasegate sounds is to get a divorced gate and dump it to atmosphere.

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