tbirdscwd

I never had to retune my procharger when I ran it as a BOV. If your already set up as a blow through and tuned correctly, you shouldn't have to change much. Like banned said, you will get a rich spike when going from WOT to completely letting off the gas, but the same happens when your recirculated, just not as drastically. The only benefit to a blow off setup (which is debatable) is not recirculating the hot air that has already been compressed. When you blow off the extra air, you supercharger is forced so inhale fresh air from your fenderwell that is much cooler than the recirculated air, therefore (in theory) will cause your supercharger to operate at lower temps. The real reason most people will run a BOV vs. Bypass is for the sound.

Whamo

the prochargers bov is a piece of s#!% althoe it dose have (i think) just the right noise. upgrading to a ggredy bolw through bov (make sure its a vaccume type) would prolly help your boost build a little. and keep the sound nice and subtle. loud bov's are for tubo'd 4 bangers.

tbirdscwd

Not the billet race bypass that came with mine. That thing rocks. I've seen the stock ones that look like a smashed pepsi can.