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Small Block Chevy Piston
Compression Ratio Chart
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| Combustion chamber Volume (in CC's) |
54 |
55 |
56 |
57 |
58 |
59 |
60 |
61 |
62 |
63 |
64 |
65 |
66 |
67 |
68 |
69 |
70 |
71 |
72 |
73 |
74 |
75 |
76 |
| 350 |
Flat Top -5cc |
11.75 |
11.60 |
11.44 |
11.30 |
11.15 |
11.01 |
10.88 |
10.74 |
10.62 |
10.49 |
10.37 |
10.25 |
10.13 |
10.02 |
9.91 |
9.80 |
9.70 |
9.59 |
9.49 |
9.39 |
9.30 |
9.21 |
9.11 |
| Dish -21cc |
9.70 |
9.59 |
9.49 |
9.39 |
9.30 |
9.21 |
9.11 |
9.02 |
8.94 |
8.85 |
8.77 |
8.69 |
8.61 |
8.53 |
8.45 |
8.37 |
8.30 |
8.23 |
8.16 |
8.09 |
8.02 |
7.95 |
7.89 |
| Dome +4cc |
13.40 |
13.19 |
12.99 |
12.80 |
12.61 |
12.43 |
12.25 |
12.08 |
11.91 |
11.75 |
11.60 |
11.44 |
11.30 |
11.15 |
11.01 |
10.88 |
10.74 |
10.62 |
10.49 |
10.37 |
10.25 |
10.13 |
10.02 |
| 377 |
Flat Top -5cc |
12.27 |
12.10 |
11.94 |
11.79 |
11.64 |
11.49 |
11.35 |
11.21 |
11.07 |
10.94 |
10.81 |
10.69 |
10.57 |
10.45 |
10.33 |
10.22 |
10.11 |
10.00 |
9.90 |
9.80 |
9.70 |
9.60 |
9.50 |
| Dish -16cc |
10.69 |
10.57 |
10.45 |
10.33 |
10.22 |
10.11 |
10.00 |
9.90 |
9.80 |
9.70 |
9.60 |
9.50 |
9.41 |
9.32 |
9.23 |
9.14 |
9.05 |
8.97 |
8.89 |
8.80 |
8.73 |
8.65 |
8.57 |
| Dish -21cc |
10.11 |
10.00 |
9.90 |
9.80 |
9.70 |
9.60 |
9.50 |
9.41 |
9.32 |
9.23 |
9.14 |
9.05 |
8.97 |
8.89 |
8.80 |
8.73 |
8.65 |
8.57 |
8.50 |
8.42 |
8.35 |
8.28 |
8.21 |
| Dish -28cc |
9.41 |
9.32 |
9.23 |
9.14 |
9.05 |
8.97 |
8.89 |
8.80 |
8.73 |
8.65 |
8.57 |
8.50 |
8.42 |
8.35 |
8.28 |
8.21 |
8.15 |
8.08 |
8.01 |
7.95 |
7.89 |
7.83 |
7.77 |
| 383 |
Flat Top -5cc |
12.59 |
12.42 |
12.25 |
12.09 |
11.94 |
11.79 |
11.64 |
11.50 |
11.36 |
11.23 |
11.09 |
10.97 |
10.84 |
10.72 |
10.60 |
10.48 |
10.37 |
10.26 |
10.15 |
10.05 |
9.94 |
9.84 |
9.74 |
| Dish -16cc |
10.97 |
10.84 |
10.72 |
10.60 |
10.48 |
10.37 |
10.26 |
10.15 |
10.05 |
9.94 |
9.84 |
9.74 |
9.65 |
9.55 |
9.46 |
9.37 |
9.28 |
9.20 |
9.11 |
9.03 |
8.95 |
8.87 |
8.79 |
| Dish -21cc |
10.37 |
10.26 |
10.15 |
10.05 |
9.94 |
9.84 |
9.74 |
9.65 |
9.55 |
9.46 |
9.37 |
9.28 |
9.20 |
9.11 |
9.03 |
8.95 |
8.87 |
8.79 |
8.71 |
8.64 |
8.56 |
8.49 |
8.42 |
| Dish -28cc |
9.65 |
9.55 |
9.46 |
9.37 |
9.28 |
9.20 |
9.11 |
9.03 |
8.95 |
8.87 |
8.79 |
8.71 |
8.64 |
8.56 |
8.49 |
8.42 |
8.35 |
8.28 |
8.21 |
8.15 |
8.08 |
8.02 |
7.96 |
| Dome +4cc |
14.36 |
14.14 |
13.92 |
13.71 |
13.51 |
13.32 |
13.12 |
12.94 |
12.76 |
12.59 |
12.42 |
12.25 |
12.09 |
11.94 |
11.79 |
11.64 |
11.50 |
11.36 |
11.23 |
11.09 |
10.97 |
10.84 |
10.72 |
| 400 |
Flat Top -5cc |
13.14 |
12.96 |
12.79 |
12.62 |
12.46 |
12.30 |
12.15 |
12.00 |
11.86 |
11.71 |
11.58 |
11.44 |
11.31 |
11.18 |
11.06 |
10.94 |
10.82 |
10.70 |
10.59 |
10.48 |
10.37 |
10.26 |
10.16 |
| Dish -16cc |
11.44 |
11.31 |
11.18 |
11.06 |
10.94 |
10.82 |
10.70 |
10.59 |
10.48 |
10.37 |
10.26 |
10.16 |
10.06 |
9.96 |
9.86 |
9.77 |
9.68 |
9.59 |
9.50 |
9.41 |
9.32 |
9.24 |
9.16 |
| Dish -21cc |
10.82 |
10.70 |
10.59 |
10.48 |
10.37 |
10.26 |
10.16 |
10.06 |
9.96 |
9.86 |
9.77 |
9.68 |
9.59 |
9.50 |
9.41 |
9.32 |
9.24 |
9.16 |
9.08 |
9.00 |
8.92 |
8.85 |
8.77 |
| Dish -28cc |
10.06 |
9.96 |
9.86 |
9.77 |
9.68 |
9.59 |
9.50 |
9.41 |
9.32 |
9.24 |
9.16 |
9.08 |
9.00 |
8.92 |
8.85 |
8.77 |
8.70 |
8.63 |
8.56 |
8.49 |
8.42 |
8.36 |
8.29 |
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SBC engine compression figured with
4.030 cylinder bore, 4.100" gasket bore, .040" gasket thickness, zero
deck, 377 and 400 with 4.125" cylinder, 4.155" gasket |
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