Calculating hp with supercharger

[HellFireTA]

Alright, a way to calculate your power, is since sea level is 14.7 psi, so divide your horsepower by 14.7, thats horsepower per psi, and then multiply your horsepower per psi by the total psi(if you're boosting 4.5 then you do 14.7+4.5), so say youre getting 305 horsepower right now, and you divide that by 14.7 which is 20.748..., then you take that number, and say you're running 4.5 psi from the blower, then you multiply the 20.748 by (14.7+4.5=19), then that ends up being about 398.36.... so you will have about 398 horsepower you can figure.

Just thought you guys might think this is interesting!

[Draco]

That can get you close, but compressor maps, intercooler efficiency, volumetric efficiency, and air fuel ratio must also be considered.

With an inefficient intercooler and a compressor operating outside of its efficiency island, you could be making 1 bar of boost, but have way less then 100% more power then what would be seen running N/A

[franchuk]

two words Dyno test


baby!

[11SECRT]

A somewhat rough estimate of how much horsepower your getting from boost(for every lb of boost you getting 12-15 horsepower) depending on intercoolers,airdensity etc, but the bare minimum you should be getting from like 6lbs is like 70hp. ;D