Forge BPV question

[rsvinylgraphics]

I was wondering if someone could explain why it takes much more force to open
the OEM BPV (almost impossible to push open with a finger) and the Forge takes
A LOT less force to open (opens easily when pushing on the piston with a finger) when using the recommended Blue spring.

 

[spdjnke]

if I'm not mistaken, the stock BPV has a diaphram inside and that will cause it to be more much difficult to just push open with your finger because of the difference in pressures, if you put a vacuum pump on it you will see how it opens easily...just my 2 cents.