power brakes not working

[chargerdon]

I installed a brake booster onto my 66 Charger that has front discs.   Not getting any power.   What is the minimum vacuum to operate power brakes ?   I read 14 bars at idle and it goes as high as 22 under throttle taking the vacuum from the vacuum port on the back of my 1406 Edelbrock carb.  .   

The brakes do operate but without any noticeable power assisst...   Feel the same with the vacuum hose disconnected as it does connected.   

I think the booster is defective.. thoughts ?

[Cuda Cody]

Was it a new or used booster you put in?

[RUNCHARGER]

What type of booster? I briefly sold parts a a Hot Rod shop and the boss did not carry the smaller boosters as they were ineffective.