Hey guys, I am just looking in to purchasing a tial 50mm bov, but noticed that there are 4 different spring settings which relate to different vacuum pressures on idle. The only problem is it's been well over a year since I have had my car running and can't remember what vacuum they pull...

I am running a gt3076, so would really appreciate if someone could put up the figure for me so I can get the correct spring.Please put the figure up in 'in.Hg'

Much appreciated.