Question:
It's a 2007 wrx sti.I already have installed injen intake(cold air), hks carbon ti exhaust, and high flow cats
Answers:
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Well the Sti already has a blow off valve So why would you want to intall another?/?2003 Audi A4 or A6 and 2006 Volvo S40?
Yes you can replace it with After market one which will probably be of a lesser quality but It will not add any performance so why?? If your looking for the noise you can simply divert the air from recirculating to the intake, plug the intake and the vent the BOV to atmosphere.
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Edit; Venting to atmosphere will not produce any loss of power or any change in the vehicles tune. The bov is only open when there is vacume after the buterflys and boost before them. (off throttle or durring spool depending how stiff the spring is.) durring this time the engine is either in F/C and not producing any power or it is just starting to spool in either case the recirculated pressure is in no way adding any kind of relevent pressure to the pre turbo intake track beacause the volume of air being realeased through the BOV is very small when compared to the size of the intake which is wide open to atmosphere via the air filter.
edit again; bypass valve is just another name for a BOV they are the same they both have preload spring and they both have a vacume port! and again Venting to atmospere should not affect tune because when its open you are off the gas which means the ECU is in fuel cut! and even if it wasn't it doesn't matter because the bypass valve just recirc's the air back into the pre-turbo intake which is not sealed to atmosphere it does not in anyway pressurize the pre turbo intake.
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The first answerer is 100% correct. You should also note that if you follow his procedure, you will get a cool noise, but also a reduction in power.Snail Shell Enclosure, 3Cubic Feet, will that fit in my trunk?? (92 Sentra)?
Serene is mostly right.Road & Track go behind-the-scenes at Toyota’s Calty Design Studio?
The Stock valve on your TMIC is actually a by pass valve.
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An aftermarket BOV will only help you if you are running significanlty more boost than that stock BPV can handle (I think the number is 19 or 20 PSI).
You CAN install one if you want the noise so that you can pick up chicks but you may want to take out the intake "snorkus" first. The "snorkus" is the part of the intake tract before the air hits the intake box (where your air filter is). It is inside of the fender well and basically acts to muffle any intake noise. A lot of people take it off and report being able to hear the stock BPV.
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If you do it the first answerer's way you may run the risk of running rich because the computer is expecting that extra air being recirculated back to the intake tract.
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Actually, the first answer is incorrect. The stock STi (and WRX) come with a bypass valve, not a blow off valve. They both recirculate pressured air back into the intake for emission control.How much horsepower does the Ford SVT focus have?
I would not install a BOV (blow off valve) on a stock STi, as it will cause you to run rich between shifts, idle unevenly, and hurt performance. Most "ricers" do it to show off they have a turbo, but in fact, they actually are hurting the performance of their (great) car.
Does any one know wear i cud find a pic of a 1984 toyota starlet thats modified??
You should wait to install the BOV until you've substantially modded the car, including a new turbo, uppipe, downpipe, and intercooler. At that point, you'll need the extra protection of a true BOV in conjuction with a reflash of your car's ECU (computer) to handle the modifications.
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