The BG would be the boost guage. And my wastegate is external and already hooked to the nipple on the compressor housing. Problem is that my BG (boost guage) is also hooked to the same nipple and it reads no vac. So I was curious where a good vac source would be

 

connected BG to the FPR vac line. i think im seeing vaccum on idle on my boost gauge, is this normal? I'll double check later today. when the turbo starts to spool should it be hitting the zero mark? and then increasing thereafter?
thanks

 

Yes, vacuum at idle is normal. Thats what you want to be seeing. And when you hit the gas pedal, it should move to 0 and as the turbo spools it should read boost.