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Chris H
Forum Moderator
Joined: 02 Mar 2004
Posts: 19978
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| Posted:
Tue Apr 20, 2004 9:30 am |
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Whilst doign the hoovering today my mind wandered as ones mind does, and the formula came to me.
CCV = CV/CR - 1
Where ccv is the combustion chamber volume, CR is the compresion ratio and CV is the cylinder volume.
for example,
1764/4=441CC
CR=10:1
CCV=441/10 - 1
=49CC
Thats stock.
So for a CR of 11:1 it would be 44.1cc.
Jimbo super unleaded pah, why bother gone into it before.
No 2 fuels are the same and a 95 ron fuel may be far superior economy wise, response wise and power wise than another fuel rated at 98RON.
Stan will no doubt know what I am on about. |
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JB
Mr Quoter-vator
Joined: 16 Feb 2004
Posts: 7405
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| Posted:
Tue Apr 20, 2004 1:17 pm |
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eh? am i bein stupid but isnt 441/10 - 1 equal to 43.1??? |
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Neal
Forum Moderator
Joined: 18 Feb 2004
Posts: 7432
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| Posted:
Tue Apr 20, 2004 2:03 pm |
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JB
Mr Quoter-vator
Joined: 16 Feb 2004
Posts: 7405
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| Posted:
Tue Apr 20, 2004 2:37 pm |
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ah...makes sense now....got murderd in school for leaving out the brackets its like leaving out .......(words) |
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JB
Mr Quoter-vator
Joined: 16 Feb 2004
Posts: 7405
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| Posted:
Tue Apr 20, 2004 2:59 pm |
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i have a different sum....
CR = (C-P+G+D+V) / (C-P+G+D)
CR = comp ratio
C = comb. cham. vol
P = pisotn dome volume [N/A]
G = gasket volume
D = Deck height [N/A]
V = Swept volume
all in cc's
wont put all the workings but i end up with 48.9cc ish (rounding) for the Comb. Cham. at 10:1.
note this is inc. the gasket vol as this is above the piston TDC
so we all agree YEY! |
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