![]() ![]() This is now standard fitment to every factory turbocharged petrol engine. Sometimes the simplest mechanical parts are the easiest to confuse, especially when they are inappropriately named- as in the case of the humble blow-off valve. ![]() Thew following is pulled directly off Pole Position Motorsport forums.throw the info out there, and let people make an informed decision themselves I think is going to be the only answer in this debate.īlow-off valves have become more of a fashion accessory than a performance item- they have to make a certain sound or look cool. ![]() Mine's not plumbed back, and is positioned such that it can be very loud on full boost, but daily driving it just gives a gentle "whoosh". I personally ran no BOV for a few months at 0.9 bar, with flutter, and having now fitted a basic Blitz one opened up as far as it will go, the noticeable "performance gain" is a reduced lag in coming back onto boost after gearshifts. ![]()
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