Engine Performance Review

What is engine Bore

• The diameter of the engines cylinder

• The diameter of a piston

• TDC - BDC

• Radius of an engines cylinder

What is an engines stroke?

• TDC - BDC

• The diameter of the engines cylinder

• The radius of the engines cylinder

• The thickness of the cylinder wall

What is the cylinder displacement of an engine with a bore of 4.5 " and a stroke of 2.75" ?

Formula = .7854 X D2 X Stroke

• 43.75 cubic inches

• 43.75 square inches

• 34.75 inches

• 23.52 cubic inches

What is the engine displacement of a V6 engine with a cylinder displacement of 5.5 cubic inches.

Formula = Cylinder Displacement X # of cylinders

• 33 cubic inches

• 23 cubic inches

• 13 cubic inches

• 22135 square inches

What is the compression ratio of an engine with a clearance volume of 5 cubic inches and cylinder displacement of 30 cubic inches?

Formula = (CD + CV) / CV

• 7 : 1

• 8 : 1

• 9 : 1

• 10 : 1

What is the volumetric efficiency of an engine that intakes 40 cubic inches of air and a cylinder displace of 50 cubic inches.

Formula= Volume of air taken into cylinder/ cylinder displacement

• 80 %

• 70 %

• 60 %

• 50 %

What is brake horsepower?

• Usable HP produced by the engine

• Power transmitted to the pistons from burning fuel

• How much power goes to the wheels

• Amount of brake pressure

What is the torque of an engine that reads 178 horsepower rotating at 1850 RPM.

Formula = (5252 X Horsepower) / RPM

• 505 LB- FT

• 505 Cubic inches

• 5.25 Lb-Ft

• 5252

What does engine performance not tell us about an engine?

• Country of Origin

• Capability

• Power

• Emission ratings

Cylinder Displacement is what?

• total volume displaced during one stroke

• amount of air inside the cylinder vs how much there could be

• Piston size

• Fuel usage