Quote:
Originally Posted by serialk11r
I don't think 7psi will cut it for 300hp, and the engine probably can't take much more than that on pump gas (unless said pump "gas" is E85). 7psi assuming you could intercool it pretty well is still less than 50% more air, and you have to subtract the energy you lose from the intercooler, the inefficiency of the supercharger (higher intake pressure causes the engine to recover most of the energy provided to the supercharger though), and then the reduced thermal efficiency of the engine because the expansion stroke is not increasing. With a 100% efficient supercharger you would be lucky to see 30% more power.
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1 bar of pressure = about 14.5 psi at 14.5 psi the engines compression ratio doubles(or flow as much air as a double the liters your applying it to)
on a normal 10.5:1 compression engine 14.5 psi would equate to 21:1 and
at 7 psi would be 15:1 ratio and after losses about 30% increased efficiency
this i do understand
171 whp stock
10 whp intake
12 whp headers
5 whp exhaust
5 whp testpipe
1 whp lightweight pulleys
4 whp cat delete
208 whp after mods (underestimating gains)
X 30% from supercharger
=270 whp = 85% drivetrain loss
318 hp at the crank
302 hp at crank with I/H/E
260 hp at the crank without mods
300 crank hp is imaginable with basic supporting mods, 300 whp is my goal
