ATI Procharger blow off?
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From: Federal Way, WA
ATI Procharger blow off?
does a procharger have a blow off sound to it like a turbo??? lol sorry for being a noob! I just thought I read that it sounds likea supercharger with the whine but also has a blow off sound to it??? any sound clips?
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Centrifical superchargers can have a blowoff valve. Works about the same as a turbo, but the valve itself has to be a little different (some won't work as well as others).
The ProCharger comes with a "bypass valve" stock, that will vent the air, kind of makes a "swoosh", but not like a turbo. I have a GReddy Type S BOV on mine and it sounds like a regular "psshhh" BOV that turbos have, it just doesn't do it as often while driving, but revving it will blow off everytime.
As far as I know, no one has a BOV on a Vortech or ProCharger that makes the chirp sound, like a cricket, when the air is expelled.
The ProCharger comes with a "bypass valve" stock, that will vent the air, kind of makes a "swoosh", but not like a turbo. I have a GReddy Type S BOV on mine and it sounds like a regular "psshhh" BOV that turbos have, it just doesn't do it as often while driving, but revving it will blow off everytime.
As far as I know, no one has a BOV on a Vortech or ProCharger that makes the chirp sound, like a cricket, when the air is expelled.
Originally Posted by HomieG35
Centrifical superchargers can have a blowoff valve. Works about the same as a turbo, but the valve itself has to be a little different (some won't work as well as others).
The ProCharger comes with a "bypass valve" stock, that will vent the air, kind of makes a "swoosh", but not like a turbo. I have a GReddy Type S BOV on mine and it sounds like a regular "psshhh" BOV that turbos have, it just doesn't do it as often while driving, but revving it will blow off everytime.
As far as I know, no one has a BOV on a Vortech or ProCharger that makes the chirp sound, like a cricket, when the air is expelled.
The ProCharger comes with a "bypass valve" stock, that will vent the air, kind of makes a "swoosh", but not like a turbo. I have a GReddy Type S BOV on mine and it sounds like a regular "psshhh" BOV that turbos have, it just doesn't do it as often while driving, but revving it will blow off everytime.
As far as I know, no one has a BOV on a Vortech or ProCharger that makes the chirp sound, like a cricket, when the air is expelled.
Originally Posted by rockd
if you put a BOV on a supercharger (lets say the HKS SSQ), it won't just make a single "pshhh" sound. It'll make a long sequence of "pshhh" sounds, getting quieter and quieter until it disappears. My stock bypass valve already does that, but it'll be much more pronounced with another BOV.
stick with bypass valves like Tial and the Vortech. A BOV is meant to stay closed all the time and opens only to vent. A bypass valve on a S/C stays open all the time and only closes when you hit atmospheric pressure. Regarless, every BOV and Bypass valve makes different noises depending on the brand. The chirping noise is specific to HKS.
I don't even know where to begin with the kit you bought Arcady
Last edited by 617G; Jan 30, 2008 at 03:53 PM.
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Originally Posted by rockd
if you put a BOV on a supercharger (lets say the HKS SSQ), it won't just make a single "pshhh" sound. It'll make a long sequence of "pshhh" sounds, getting quieter and quieter until it disappears. My stock bypass valve already does that, but it'll be much more pronounced with another BOV.
I don't really hear mine
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<object width="425" height="355"><param name="movie" value="http://www.youtube.com/v/tkf4myXymQI&rel=1"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/tkf4myXymQI&rel=1" type="application/x-shockwave-flash" wmode="transparent" width="425" height="355"></embed></object>
An old old old school vid of mine. That's the stock bypass valve, you can hear it ''blow off'' for a second or two after the gas is let off...
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Another old vid, with the stock valve. Vid got cut short.. but you can still hear it a little.
An old old old school vid of mine. That's the stock bypass valve, you can hear it ''blow off'' for a second or two after the gas is let off...
<object width="425" height="355"><param name="movie" value="http://www.youtube.com/v/Y5-TiFK_LYU&rel=1"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/Y5-TiFK_LYU&rel=1" type="application/x-shockwave-flash" wmode="transparent" width="425" height="355"></embed></object>
Another old vid, with the stock valve. Vid got cut short.. but you can still hear it a little.
Originally Posted by SUSPECT
does a procharger have a blow off sound to it like a turbo??? lol sorry for being a noob! I just thought I read that it sounds likea supercharger with the whine but also has a blow off sound to it??? any sound clips?
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Originally Posted by Lawy'dU
you can install an aftermarket one if you like. There is a writeup on one of the G35/350z forums that I found a while back. You remove the stock bypass valve and you replace it with a regular bov
Originally Posted by 617G
You cannot use a regular BOV with a Centrifugal supercharger because it's always making boost. There a few exceptions such as the Tial that can be used as a bypass valve, though.
Originally Posted by Lawy'dU
Re-attach the vacuum line and start engine to make sure valve opens under vacuum. It will close under loaded boost conditions.
It's not a traditional Blow-off valve 
Racing Bypass Valve Type H34 vents excess pressure back into the car’s air intake making the valve ideal for Mass Air Flow (MAF) metered cars where venting to atmosphere can create a "rich" air/fuel ratio right after the valve goes off. The Racing Bypass Valve Type H is CNC machined out of billet aluminum and brass. Valve operation, while louder than most stock valves, is quiet compared to a BOV that is vented to atmosphere like our BOV-H or BOV-H-RFL.
Last edited by 617G; Jan 30, 2008 at 08:49 PM.
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