engine size
05-07-2007, 12:51 AM
#12
5th Gear Member
Join Date: Mar 2006
Location: CO
Posts: 3,095
RE: engine size
to get the "physical size" of the engine, you'd have to do some measuring....nobody rates that. Displacement is actually the volume of air/fuel mixture that is brought into the engine during one cycle. So when the piston is at top dead center, then moves down and the valves open up, however much air is brought in before the piston reaches bottom dead center, multiplied by the number of cylinders, is the displacement of the engine . This is measured in volume of the air at 14.7psi or one atmosphere.
05-07-2007, 02:11 AM
#13
2nd Gear Member
Join Date: Jan 2007
Location:
Posts: 215
RE: engine size
The math is something like this (I think - its been a while since I've taken a math class):
displacement = pi x r^2 x s x n
where pi is pi (approx 3.14), r is the radius of the cylinder, s is the stroke length (bottom dead center to top dead center) and n is the number of cylinders
It doesn't matter if you measure in inches or centimeters. If you use inches you come up with 281 cubic inches and in centimeters its about 4600 cubic centimeters (4.6L)
To convert between liters and cubic inches is easy 1L = 61.02ci for example 4.6 x 61.02 = 280.69, or rounded, 281 cubic inches
displacement = pi x r^2 x s x n
where pi is pi (approx 3.14), r is the radius of the cylinder, s is the stroke length (bottom dead center to top dead center) and n is the number of cylinders
It doesn't matter if you measure in inches or centimeters. If you use inches you come up with 281 cubic inches and in centimeters its about 4600 cubic centimeters (4.6L)
To convert between liters and cubic inches is easy 1L = 61.02ci for example 4.6 x 61.02 = 280.69, or rounded, 281 cubic inches
05-07-2007, 02:27 AM
#15
3rd Gear Member
Join Date: Feb 2006
Location:
Posts: 523
RE: engine size
ORIGINAL: buddha211
The math is something like this (I think - its been a while since I've taken a math class):
displacement = pi x r^2 x s x n
where pi is pi (approx 3.14), r is the radius of the cylinder, s is the stroke length (bottom dead center to top dead center) and n is the number of cylinders
It doesn't matter if you measure in inches or centimeters. If you use inches you come up with 281 cubic inches and in centimeters its about 4600 cubic centimeters (4.6L)
To convert between liters and cubic inches is easy 1L = 61.02ci for example 4.6 x 61.02 = 280.69, or rounded, 281 cubic inches
The math is something like this (I think - its been a while since I've taken a math class):
displacement = pi x r^2 x s x n
where pi is pi (approx 3.14), r is the radius of the cylinder, s is the stroke length (bottom dead center to top dead center) and n is the number of cylinders
It doesn't matter if you measure in inches or centimeters. If you use inches you come up with 281 cubic inches and in centimeters its about 4600 cubic centimeters (4.6L)
To convert between liters and cubic inches is easy 1L = 61.02ci for example 4.6 x 61.02 = 280.69, or rounded, 281 cubic inches
Do we add the volume of the space remaining in the combustion chamber when the piston is at TDC ?
05-07-2007, 03:38 AM
#16
2nd Gear Member
Join Date: Jan 2007
Location: Virginia
Posts: 337
RE: engine size
ORIGINAL: ratnacage
Exactly correct.
Do we add the volume of the space remaining in the combustion chamber when the piston is at TDC ?
ORIGINAL: buddha211
The math is something like this (I think - its been a while since I've taken a math class):
displacement = pi x r^2 x s x n
where pi is pi (approx 3.14), r is the radius of the cylinder, s is the stroke length (bottom dead center to top dead center) and n is the number of cylinders
It doesn't matter if you measure in inches or centimeters. If you use inches you come up with 281 cubic inches and in centimeters its about 4600 cubic centimeters (4.6L)
To convert between liters and cubic inches is easy 1L = 61.02ci for example 4.6 x 61.02 = 280.69, or rounded, 281 cubic inches
The math is something like this (I think - its been a while since I've taken a math class):
displacement = pi x r^2 x s x n
where pi is pi (approx 3.14), r is the radius of the cylinder, s is the stroke length (bottom dead center to top dead center) and n is the number of cylinders
It doesn't matter if you measure in inches or centimeters. If you use inches you come up with 281 cubic inches and in centimeters its about 4600 cubic centimeters (4.6L)
To convert between liters and cubic inches is easy 1L = 61.02ci for example 4.6 x 61.02 = 280.69, or rounded, 281 cubic inches
Do we add the volume of the space remaining in the combustion chamber when the piston is at TDC ?
