OP wrote:Hey I live in Ca, and am going to swap an RB25DET into my S14.
Wait up, you're swapping an RB25 into an S14, and the biggest tech question you have so far is how to quiet the blow off to hide from cops? I take it you haven't bought the motor or started your build/swap yet... Anyway the other guys already answered you, to minimize noise you'd recirculate your bypass valve and run a stock airbox.
madcowvert wrote:you just get a tube and weld it to your intercooler. all the air that did that wooosh sound will go back into the intercooler. so your problem is solved no more wooosh.
Way to show you don't have any clue how a bypass valve works on a turbo system. The correct way to plumb the bypass valve is to recirculate the intake charge back to the compressor inlet pipe, after the MAF and before the compressor inlet. What you wrote about dumping back to the intercooler would do nothing at all, just think about it.
^ Sorry this image isn't bigger, but it's a great, simple diagram to reference.
When I saw the exaggerated topic in caps locked I knew this'd be a great thread..
Modified by mello88 at 10:13 AM 8/16/2007