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Originally Posted by ArthurS
I look all over NASIOC for some answers, but you get so many mixed results.
Do BOV's actually help performance at all? Or are they basically just to make noise? IF they help performance, which ones are amoung the best?
I was kinda looking at the MRT GFB Bov, which says it:
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Unique design allows both venting to atmosphere to give that unique "whoosh" noise as well as part venting back to inlet to stop over fueling and poor idle.
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Are they really worth it? How loud are they? Sorry bout being such a n00b, but these are fairly new to me. |
I believe the purpose of the turbo wastegate (blow off valve) is to relieve the overpressure in the intake path that happens when you lift off the gas pedal, since the throttle plate closes up but the turbo compressor is still spinning. That sudden high pressure downstream of the compressor can slow down or even stall the compressor, so when you get back on the gas it takes more time to spin back up, hence "turbo lag". So, it helps in both reducing turbo lag and also in reducing physical stress on the turbo components. This article is fairly descriptive..
http://www.syclone.freeserve.co.uk/blow.htm