I have a problem with my vacum presure 17 psi for my 7 inch power brake unit because of the size cam I decided to use, I purchased a auxilary vacum canister to help with the low vacum, installed it and it helps some what but the vacum gage still only shows 17 psi, and the brake pedal is only good for one application before it is hard to apply again. Has anyone come accross this, am I over looking something ? Should I have purchased a vacum pump ?
If so, do vacum pumps provide the 25 psi I need for proper operation ?