Quote:
Originally Posted by Crunk81us
I mean does anybody know the volume of the combustion chamber and the piston dome? I am trying to ascertain the variance from factory in the "12.5:1" ratio claimed.
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Combustion chamber 40.3cc
That's total volume
including the standard piston dome... but not the headgasket...
Standard size piston dome 2.7cc, but that's just trivia at this point, and Head only is 37.6cc, trivia as well.
Headgasket standard thickness 0.5, volume of gasket area 2.905 cc
Total swept volume @
86.0 stroke, @
86.0 bore, 499.758 cc
499.758 + 40.3 + 2.905
40.3 + 2.905
542.963 / 43.205
"12.56 : 1"
There ya go
Standard piston sizes, 86.00, 86.25, 86.50 if you want to calculate the maximum variance, but I don't have the dome CC for the overbore pistons, so the combustion chamber volume will not be correct.
This doesn't factor the piston to wall volume above the first ring either, because I'm just not doing that. Y'all have to deal.