Just for fun, I tried to calculate my compression ratio. I may have fudged it a bit though o No: heres what I got Heads- 1231109, never surfaced 69cc=3.00 Ci Head gasket- 4.5x.040 = .636 ci Deck height (guestimate o No: ) .065x4.2175= .906Ci Dish-3.5x.090= .866ci cylinder volume (430 .030) 54.48ci Volume @TDC- 5.408 cubes CV+HG+DH+D=TDC (ChamberVolume+head gasket+deck height+Dish=TDC) 3.00+.636+.906+.866=5.408 Volume @BDC- 59.88 cubes Cylinder volume+ TDC volume=59.88 59.88/5.408=11.07??? is this right??? I kinda doubt it..... I did this all with the assumption that the volume of a cylinder= pixR2xh I'm not sure on that equation though. Someone please help me!!!:ball: thanks :beer
If your pistons have a 25 cc dish and are .065 in the hole, then I come up with 10.45 on Desktop Dyno with a 69 cc head and .040 thick gasket. This is on a 455 engine bored .030.
Negative. I get 9.23:1 . The combustion cc's are where you're off. There are 16.39 cc per ci. So the heads are 4.21 ci. That gives a total of 6.62 ci unswept. Swept plus unswept is 54.48 + 6.62 = 61.1 . Then 61.1/6.62 = 9.23 .
Right right right..... Well that clears it up. If Only I knew what my deck height really is. Anyone hve any ballpark figures? So much for my 10.0:1 pistonsou:
