How much boost does a stock truck give ?

I installed a boost gauge and can only get 14-15 max. I also wonder since I used like all 10 foot of boost line to the gauge if that may have something to do with it? ( I have it all wrapped up by the brake booster)

I checked all the boots but wonder if/what may be going on as it seems like a low pressure.

 

15-18 I think was about right for a stock truck. Dads used all the line in the kit too n is hitting 24 pounds boost like the 96 is supposed to.

 

12-18psi for stock.

I can hit 30lbs with the 21cm lagmaster with timing bump, DennyT 2, and full power screw.

 

Guess I was a little off I can get 28 outta mine.