i guess i misinterpretted your wording.. ours uses karmen vortex Hz readigns to adjust the ammount of fuel used.. it's not really a set "map" or anything.. at least as far as i know.. chris probably knows better than i do but that's the way i thought ours worked..

 

tsi guy
I am driving the same car you are, and i vent to the atmosphere, with no problems.

 

dude is that your car on the site? it looks nice.. yeah you can vent, you will stil lrun slightly rich between shifts though.. you have a valve that's made to be able to do it.. the stock valve can't unless it's crushed.

 

my talon didn't really have _problems_ back when i tried venting mine, but the car did run rich according to the logger. the fuel trims jumped all over the place with it vented, it was a nightmare to keep up with it on the S-AFC...
no matter which BOV you use, you can't get around the fact that'll it'll run rich after it blows off. you're releasing metered air out of the system, the ECU expects it to be there because the MAF has counted it already...
my CBV is plumbed back into the intake, the sound isn't worth it to me.

marshall