what is proper adjstmnt for blowoff vlv?
11-28-2002, 02:45 PM
#1
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what is proper adjstmnt for blowoff vlv?
I recently purchased and installed a Turbosmart dual vent adjustable blow off valve. Unfortunately, I don't have any idea what the best way to adjust it is.
It seems to me that too much spring tension will keep the valve closed for too long (creating pressure surge against the turbo) but too little spring tension will let the valve be pushed open during high boost.
Any suggestions?
ps. the suposedly "application specific" BOV that I bought doesn't fit on the stock WRX without some modifications. The "horn" must be removed in order to clear the grey rigid emissions lines that run along the front of the intercooler, and the factory bypass flange has an o-ring inside it that doesn't seat well against the Turbosmart housing. Just an FYI to potential shppers...
It seems to me that too much spring tension will keep the valve closed for too long (creating pressure surge against the turbo) but too little spring tension will let the valve be pushed open during high boost.
Any suggestions?
ps. the suposedly "application specific" BOV that I bought doesn't fit on the stock WRX without some modifications. The "horn" must be removed in order to clear the grey rigid emissions lines that run along the front of the intercooler, and the factory bypass flange has an o-ring inside it that doesn't seat well against the Turbosmart housing. Just an FYI to potential shppers...
10-24-2005, 02:36 AM
#2
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Join Date: Apr 2003
Location: Orange County, CA
Posts: 846
Car Info: 08 WRX - 401whp/408wtq
that info is much appreciated... I'm actually looking between that and the Worx... Although I dont know what the Turbosmart sounds like.. Any sound clips by any chance? could you describe the nature of its blow off???
Also, regarding adjustment, I would have it set so that it doesnt vent atmospherically until maybe 3500-4000 rpm, to allow it to recirculate enough, and only vent out the excess amount of air... but also consider the driveability, and the characteristics of how it feels during shifts... does your rpm drop? hows your idle? if your idle is consistent, and youre only blowing off under higher boost, then you should be fine, nothing to worry about!
Also, regarding adjustment, I would have it set so that it doesnt vent atmospherically until maybe 3500-4000 rpm, to allow it to recirculate enough, and only vent out the excess amount of air... but also consider the driveability, and the characteristics of how it feels during shifts... does your rpm drop? hows your idle? if your idle is consistent, and youre only blowing off under higher boost, then you should be fine, nothing to worry about!
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