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MECHANICAL
COMPRESSION RATIOS
OF SPUTHE BIG BORE CYLINDERS
95 cu inch – Compression Ratios
| CHAMBER | FLAT TOP PISTONS | DISH TOP PISTONS |
|
90cc |
8.7:1 |
7.7:1 |
|
86cc |
9.0:1 |
7.9:1 |
|
80cc |
9.6:1 |
8.3:1 |
|
76cc |
10.0:1 |
8.6:1 |
|
72cc |
10.4:1 |
8.9:1 |
104 cu inch – Compression Ratios
| CHAMBER | FLAT TOP PISTONS | DISH TOP PISTONS |
|
90cc |
9.4:1 |
8.3:1 |
|
86cc |
9.8:1 |
8.5:1 |
|
80cc |
10.3:1 |
8.9:1 |
|
76cc |
10.8:1 |
9.3:1 |
|
72cc |
11.3:1 |
9.6:1 |
Piston Balance Weights
|
95 cu inch – 3.780 Standard bore |
Flat Top Pistons – 1057 grams |
|
Dish Top Pistons – 1061 grams |
|
104 cu inch – 3.780 Standard bore |
Flat Top Pistons – 1042 grams |
|
Dish Top Pistons – 1039 grams |
Sputhe Spectre, Bonneville record holder
1650 MPG 1997
E-Mail: sputhe@hotmail.com
Tel: (530) 268-0887
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