Quote:
Originally Posted by Won35i
Seems like we need some turbo education in this forum. A wastegate and blow -off valve are totally different and worth totally different. Externally gated turbos are much much better for tuning and also instrumental for large turbos. Wastegates prevent overboosting. BOVs relieve charged air that is useless due to heat soak.
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Yes, yes, wastegates affect boost and control creep before the turbo. BOV's relieve backpressure after the turbo (typically off-throttle).
Doesn't the N54 have relatively small turbos? I don't know off-hand how much boost is produced stock, but it would seem an aftermarket BOV would be more a matter of asthetics than need.
quoted from GFB:
"This system means that about 50% of the air is recirculated.... also means that certain Audi/VW, Nissan, Mitsubishi and other cars with sensitive airflow meters can use this valve."
http://www.gofastbits.com/index.php?..._option=hybrid