put my bov on and i noticed i got about 1.5 psi out of it:naughty: but when i baught it the gentleman i talked 2 said that it wouldnt do n e thing except spool the turbo faster???? i was just curious about the bov. i am 15 n new in the supra game and i love it:love: , and was wondering what the bov does... it sounds wonderfull and spools quite quickly i am very pleased with the model.