[KingLT1]

I believe the OP is complaining about the bypass being too much like a on/off switch. So it goes from nothing to kill with just the slightest increase in throttle. Placing a restrictor in the vacuum line will slow down the speed at which the bypass closes and smooth the transition from vacuum to boost.

I believe this is why the factory LT4 has a electronic bypass solenoid where the aftermarket stuff is just a mechanical vaccum operated unit.