39 psi boost

[kmkdiesel]

I was out doing some tuning the other day and watching my boost for probably the first time and this is what I found out. In 6th gear about 2250 rpms then punching it it will shoot up to about 34-35 psi everytime then drop down to about 25-26 psi and stay there. I seen it hit 39 one time. HOw much are you guys boosting on your 6.7s.