Interesting on that idea, soft enough to be open at idle hey, so you rigged it to kinda be like a intake/bypass valve for a moment
Yes, always used the lightest spring I could make or find. On some I was able to use the round spring found in Mikuni round slide carbs as there are different diameters and I used to have lots of old carbs laying around. Actually learned this trick from Shane Stanger (Twisted Turbos) who learned it from Brad Story. Had to make sure the boost reference was on engine side of throttle bodies to get vacuum and it would help with it quick to open on throttle chop or open at idle. Hard to get to work properly on smaller diameter BOV as the suction force on small surface area isn't as good. The larger diameter valves like the Twisted kits had worked great.
