R=S + P Solve for P

P=W/F Solve for F

The indicated horsepower (ihp) of an engine measures the power of the engine before friction loss. The ihp is given by

ihp=(MEP) x D x S

___________

792,000

Where MEP represents the mean effective pressure of a typical cylinder in pounds per square inch (psi), D represents displacement in cubic inches (in.3), and S represents engine speed in revolutions per minute (rpm).

a. Find the ihp of a 224 in.3 engine operating at 3800 rpm with an MEP of 170 psi. Round to three significant digits.

b. If the ihp of a 244 inch3 engine operating at 3250 rpm is 206, what is the MEP of a typical cylinder? Round to three significant digits.