I just got a digital non contact tach to verify the rpm of my supercharger..it cost $25 from this joint.
see the chart below to see the math that I have come up with to stay below the mfg max rpm for the blower. I am not sure if one can calculate boost level linearly or not, I suspect not thus I have not done it. If you have thoughts on this please let me know.
In the chart you can see the blue cell, which is my current state of 12psi at 7500rpm which currently yeilds 212rwhp with a very rich (read SAFE) tune. I am going to change to the 2.8" pulley, which I already have, next year. I just want to enjoy what I have right now
