Engine Sizes and Calculations:
Engine Sizes and Calculations: Lab – 1 Chapter 3
Name: ____________________________________________________
Date: __________________________________________________
Use the formulas on pages 63-65 in your book to answer the following:
1. Given the following;
Bore = 2”
Stroke = 4”
Cylinders = 4
1a. Size in cubic Inches _________________
1b. Size in Liters ____________________
2. Given the following;
Bore = 2.5”
Stroke = 3.75”
Cylinders = 8
2a. Size in cubic Inches _________________
2b. Size in Liters ____________________
Now calculate the compression ratio for the following:
piston = 40.5 cu. in.
combustion chamber = 5.5 cu. in.
3a. compression ratio ______________________
piston = 50.5 cu. in.
combustion chamber = 4.5 cu. in.
3b. compression ratio ______________________
piston = 60.5 cu. in.
combustion chamber =10.5 cu. in.
3c. compression ratio ______________________
Calculate the HP/Liter efficiency of the following engines:
A> 4.6L= 305 HP HP/L = __________________
B> 1.8L = 205 HP HP/L = __________________
C> 2.5L = 150 HP HP/L = __________________
D> 3.6 = 250 HP HP/L = __________________
Which engine was most efficient? ______________
Which was the least? _____________
Horsepower (hp) is the name of several units of measurement of power. The most common definitions equal between 735.5 and 750 watts.[1] Horsepower was originally defined to compare the output of steam engines with the power of draft horses in continuous operation
Brake horsepower (bhp) is the measure of an engine's horsepower before the loss in power caused by the gearbox, alternator, differential, water pump, and other auxiliary components such as power steering pump, muffled exhaust system, etc
Calculate BHP for the following engines =
a.
Torque = 200
RPM = 4400
HP = ____________
b.
Torque = 150
RPM = 2000
HP = ____________
c.
Torque = 200
RPM = 8000
HP = ____________
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