Where is the best place to tap the boost gauge into. When we start my buddies car right now it reads 0 lbs. on the gauge at idle. It should read -20 or so on the gauge at idle. Any help would be appreciated. Thanks

 

is it a manual boost gauge or electronic?

 

its a manual boost gauge

 

most people tap it off the intake manifold. make sure your boost gauge isn't hooked up behind a check valve

 

Anywhere after the throttle plate, but before the intake valves