Originally posted by flubyux2
harder means it puts more tension on the spring, and itll stay closed longer under higher boost. you can even adjust the CBV to stay closed at idle, like a H-K-Dollar sign SSQV.
The problem with setting it lick this is compresor surge. I know that on a t-25 if it doesn't vent at idle you will get mad surge at low boost levels. I have hooked up a boost gauge to the vacuum line and when you are on the throttle it actually puts pressure on the diaphram. So the way mine is set up right now, is that it's open at idle, as soon as I step on the gas it slams shut ans holds the boost until I let off the gas and the pressure changes to a vacuum and opens the valve....did that make sence to anyone but me???