Displacement -- Nerd wanted, please
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Displacement -- Nerd wanted, please
OK, this may be a bit silly, but where am I going wrong?
I wanted to know how many cubic inches my 2015 Stingray was, so I did the following:
Chevy calls it 6.2 liters, and sometimes I see it listed as 6.2 liters (376 Cu in) but I know that a liter is 61.024837 cubic inches. If I multiply 6.2 x 61.024837, I get 378.3539894 cubic inches, not 376. But then I'm thinking that 6.2 liters is probably rounded off, so I find that the bore is 4.06 and the stroke is 3.62. If I multiply the bore x pi, then by the stroke, I get the displacement per cylinder x 8 cylinders should give me the total displacement. So, (4.06 x 3.14159265 x 3.62 x 8) =369.38092396464.
Then, if I divide 369.38092396464 by 61.024837, I get 6.05296, not the 6.2 I'm expecting.
What is the displacement of this engine, in CCs and in cubic inches, and what is wrong with my logic?
I wanted to know how many cubic inches my 2015 Stingray was, so I did the following:
Chevy calls it 6.2 liters, and sometimes I see it listed as 6.2 liters (376 Cu in) but I know that a liter is 61.024837 cubic inches. If I multiply 6.2 x 61.024837, I get 378.3539894 cubic inches, not 376. But then I'm thinking that 6.2 liters is probably rounded off, so I find that the bore is 4.06 and the stroke is 3.62. If I multiply the bore x pi, then by the stroke, I get the displacement per cylinder x 8 cylinders should give me the total displacement. So, (4.06 x 3.14159265 x 3.62 x 8) =369.38092396464.
Then, if I divide 369.38092396464 by 61.024837, I get 6.05296, not the 6.2 I'm expecting.
What is the displacement of this engine, in CCs and in cubic inches, and what is wrong with my logic?
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I've seen it listed as 6162cc. http://gmauthority.com/blog/gm/gm-engines/lt1/
Click on specifications at the link
Bore & stroke = 103.25 x 92mm
6162 = 376.028311 cu in.
Click on specifications at the link
Bore & stroke = 103.25 x 92mm
6162 = 376.028311 cu in.
Last edited by mschuyler; Aug 7, 2017 at 03:25 PM.
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OK, this may be a bit silly, but where am I going wrong?
I wanted to know how many cubic inches my 2015 Stingray was, so I did the following:
Chevy calls it 6.2 liters, and sometimes I see it listed as 6.2 liters (376 Cu in) but I know that a liter is 61.024837 cubic inches. If I multiply 6.2 x 61.024837, I get 378.3539894 cubic inches, not 376. But then I'm thinking that 6.2 liters is probably rounded off, so I find that the bore is 4.06 and the stroke is 3.62. If I multiply the bore x pi, then by the stroke, I get the displacement per cylinder x 8 cylinders should give me the total displacement. So, (4.06 x 3.14159265 x 3.62 x 8) =369.38092396464.
Then, if I divide 369.38092396464 by 61.024837, I get 6.05296, not the 6.2 I'm expecting.
What is the displacement of this engine, in CCs and in cubic inches, and what is wrong with my logic?
I wanted to know how many cubic inches my 2015 Stingray was, so I did the following:
Chevy calls it 6.2 liters, and sometimes I see it listed as 6.2 liters (376 Cu in) but I know that a liter is 61.024837 cubic inches. If I multiply 6.2 x 61.024837, I get 378.3539894 cubic inches, not 376. But then I'm thinking that 6.2 liters is probably rounded off, so I find that the bore is 4.06 and the stroke is 3.62. If I multiply the bore x pi, then by the stroke, I get the displacement per cylinder x 8 cylinders should give me the total displacement. So, (4.06 x 3.14159265 x 3.62 x 8) =369.38092396464.
Then, if I divide 369.38092396464 by 61.024837, I get 6.05296, not the 6.2 I'm expecting.
What is the displacement of this engine, in CCs and in cubic inches, and what is wrong with my logic?
area of the cylinder bore is 3.1416" X (2.03" x 2.03")= 12.9462 sq in, not 3.1416" X 4.06"=12.2374 sq in.
It's pie are square, as they say in Arkansas, not Pie diameter.
Last edited by JoesC5; Aug 7, 2017 at 03:20 PM.
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Thread Starter
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Thanks for all the help. You guys caught me using pi x the diameter, instead of pi x the square of the radius. Thought it had to be something simple I was missing.
So, based on a bore of 4.06" (103.25mm) and a stroke of 3.62" (92mm), the engine displacement is 6,162.37cc, 6.16237 liter, or 374.921 cubic inches.
If you get results very slightly different, it's because GM is not converting inches to millimeters at exactly the 1959 internationally agreed 25.4 mm=1 inch, so we have to guess whether the inches are right or the millimeters are right. Still, I'm close enough.
Thanks guys.
So, based on a bore of 4.06" (103.25mm) and a stroke of 3.62" (92mm), the engine displacement is 6,162.37cc, 6.16237 liter, or 374.921 cubic inches.
If you get results very slightly different, it's because GM is not converting inches to millimeters at exactly the 1959 internationally agreed 25.4 mm=1 inch, so we have to guess whether the inches are right or the millimeters are right. Still, I'm close enough.
Thanks guys.
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It should, but I look at it this way. The rest of the word has gone metric. The USA has not. However, lots of stuff is in metric. Cars are manufactured using metric measurements. Every mechanic has a set of metric tools and a set of inch-based tools. Measuring cups have both. Speedometers have both. All scientific work is done in metric. Most Americans know a liter is about a quart, 100 KMH is a smudge over 60 mph, and a meter is 3 inches or so longer than a yard. The only thing we really have trouble with is temperature. 30 degrees Fahrenheit is cold, but 30 degrees Celsius is hot. That's just not intuitive. But other than that Americans are bilingual and the rest of the world is not.
Bill
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ALWAYS someone to argue. I already said cars are in metric, but my major point still stands: Americans are bilingual; the rest of the world is not.
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Thanks for all the help. You guys caught me using pi x the diameter, instead of pi x the square of the radius. Thought it had to be something simple I was missing.
So, based on a bore of 4.06" (103.25mm) and a stroke of 3.62" (92mm), the engine displacement is 6,162.37cc, 6.16237 liter, or 374.921 cubic inches.
If you get results very slightly different, it's because GM is not converting inches to millimeters at exactly the 1959 internationally agreed 25.4 mm=1 inch, so we have to guess whether the inches are right or the millimeters are right. Still, I'm close enough.
Thanks guys.
So, based on a bore of 4.06" (103.25mm) and a stroke of 3.62" (92mm), the engine displacement is 6,162.37cc, 6.16237 liter, or 374.921 cubic inches.
If you get results very slightly different, it's because GM is not converting inches to millimeters at exactly the 1959 internationally agreed 25.4 mm=1 inch, so we have to guess whether the inches are right or the millimeters are right. Still, I'm close enough.
Thanks guys.
