Rundown on the situation:

Car pulls around 20in at idle. However when I'm preparing to launch the car at around 3-4k rpm, the motor is pulling around 25in (not creating boost). While I'm not too concerned about the car not creating boost, I am concerned about what sort of ramification this much vacuum created may have on a BOV and the car when I try to launch at that rpm.

The spring that was recommended to me was for an SVO running around 20. The "tech" explained this was the spring they always used for the SVO, and a stiffer spring (used on those pulling more vacuum) was "too much" for the SVO.

So...knowing that the spring was optimal for a car pulling 20 at idle, am I going to run into any problems when I try to launch the car? My concern is the vacuum pulling open the BOV and venting air when I am trying to launch the car. This is a VAM/MAF car and it will vent to atmosphere when the BOV is installed.