cc to cubic inches conversion
#1
Greetings,
Just out of curiosity, I wanted to convert the size of ATV engines to cubic inches (some of us are still grounded in the days when car engines were measured in cubic inches and will never get used to the metric system). I found a table that gave a conversion factor of .06102 -- that is, multiply the cc number by .06102 to get cubic inches. Is this correct?
This makes a 450 cc engine a 27.46 ci engine. Or a 432 cc is really a 26.36 ci. Sound right?
Just out of curiosity, I wanted to convert the size of ATV engines to cubic inches (some of us are still grounded in the days when car engines were measured in cubic inches and will never get used to the metric system). I found a table that gave a conversion factor of .06102 -- that is, multiply the cc number by .06102 to get cubic inches. Is this correct?
This makes a 450 cc engine a 27.46 ci engine. Or a 432 cc is really a 26.36 ci. Sound right?
#2
#5
Try 1/4 (Pi)(Diameter)(Diameter)(Stroke). I think that works.
Engineer feller down at the mill claims with calculus, you can calculate the increase (he called it, "delta," I think) only an overbore gives over the stock displacement, but he began using terms I didn't understand, like "antideriviative" and such; he lost me early in the discussion.
Tree Farmer
Engineer feller down at the mill claims with calculus, you can calculate the increase (he called it, "delta," I think) only an overbore gives over the stock displacement, but he began using terms I didn't understand, like "antideriviative" and such; he lost me early in the discussion.
Tree Farmer
#7
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#8
#9
#10
I got it! I went to www.macdizzy.com/sixtynine.htm and Rick had a link to some math stuff.
Here it is for a stock R:
Bore=66mm
Stroke=72mm
The equation for volume(in cubic centimeters) in a cylinder is:
pi*r^2*h
pi=3.14159
r=66/2=3.3cm
h=7.2cm
3.14159*3.3^2*7.2=246.32578 cc's
As far as boring out an R with stock stroke goes, for each .010" (.25mm) over piston you go up, you add roughly 2cc's. Here is a list.
Bore CC's
---------------------
stock bore 246.33
0.25mm 248.20
0.50mm 250.07
0.75mm 251.96
1.00mm 253.85
1.25mm 255.74
1.50mm 257.65
1.75mm 259.56
2.00mm 261.48
2.25mm 263.41
2.50mm 265.34
2.75mm 267.28
3.00mm 269.23
Here it is for a stock R:
Bore=66mm
Stroke=72mm
The equation for volume(in cubic centimeters) in a cylinder is:
pi*r^2*h
pi=3.14159
r=66/2=3.3cm
h=7.2cm
3.14159*3.3^2*7.2=246.32578 cc's
As far as boring out an R with stock stroke goes, for each .010" (.25mm) over piston you go up, you add roughly 2cc's. Here is a list.
Bore CC's
---------------------
stock bore 246.33
0.25mm 248.20
0.50mm 250.07
0.75mm 251.96
1.00mm 253.85
1.25mm 255.74
1.50mm 257.65
1.75mm 259.56
2.00mm 261.48
2.25mm 263.41
2.50mm 265.34
2.75mm 267.28
3.00mm 269.23