It is for if you do not have a SC. Increase of N/A engine.
I did mine with adding 3psi and it says I got 766 rwhp increase. Does not work for us.
HP Loss due to timing adjustment: 40
Est. flywheel HP with supercharger: 1769.0739875
Est. rear wheel HP with supercharger: 1415.25919
Total HP Gain: 766.25919 rear wheel HP
Percentage Gain: 118.067671802773 %
Agreed...too many variables too. Such as heads, cams...things people do when they put on a blower too. According to that I'm about 50RWHP shy of where I should be.
It gives you a ball park figure +/- about 100RWHP. :kaboom: