Originally Posted by
mitsu420aT
so my next question is :
what is the difference between a recurculiated o2 housing and a o2 housing with a dump tube ? or dump tube - into exhaust ?
is there a sound difference over stock ?
a recirculating dump is quiet. an open dump is noisy. Open dump sounds like a very loud exhaust leak because that is exactly what it is. open dump sound occurs when the turbo is under boost and the wastegate has opened. it is quiet just normal driving around. the turbo whistling sounds are not heard through an open dump. turbo whistle is only heard when the exhaust pipe is straight pipe with no muffler or cat. you dont really hear any tubo whistle at full throttle its more heard at light cruise speeds. if you really want to here it have the muffler tip at a right angle to the car. that way when you drive by cars or a wall you will here the sound magnified as it bounces off. very cool sound actually. IMHO this would be cool with 2.5 inch pipe, 3.0 is too loud to deal with.
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