Bob's Studebaker Resource Website
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How to identify cylinder head compression ratios - Studebaker Engines
| Engine type | Part # | Casting # | Location | Ratio | Gasket |
| "L" Head | 1549218 | 1549218 | Right Center | 8.0-1 | |
| "L" Head | 1548294 | 1548294 | Right Center | 7.0-1 | |
| OHV Head | 1561582 | none | none | 8.0-1 | 1558948 |
| V8 | 537571 | 537555 | Outside Center | 8.0-1 8.5-1 |
535982 1545072 |
| V8 | 536097 | 535976 | Outside Center | 7.5-1 | |
| V8 | 536790 | Use 1557580 | 7.0-1 | ||
| V8 | 1555295 | 1555294 | Outside Center | 8.25-1 | 1545072 |
| V8 | 1557580 | 1557582 | Outside Center | 7.0-1 7.5-1 |
535982 1545072 |
| V8 | 15557571 | 1557570 | Outside Center | 9.5-1 10.25-1 |
535982 1545072 |
| V8 | 1557579 | 1557581 | Outside Center | 8.0-1 8.5-1 |
535982 1545072 |
| OHV | 1561582 | none | none | 8.5-1 | 1550608 |
| Note: Gasket 535982 is .050 thick and gasket 1545072 is .020 thick | |||||
| Engine type | Part # | Casting # | Location | Ratio |
| 194 (1965) | 1564874 | 3864888 | #5 Cylinder | 8.5-1 |
| 194 (1965) | 1564875 | 3864886 | #5 Cylinder | 7.5-1 |
| 194 (1966) | 1565707 | 3872704 | #5 Cylinder | 8.5-1 |
| 194 (1966) | 1565708 | 3872708 | #5 Cylinder | 7.5-1 |
| 230 | 1565708 | 3872708 | #5 Cylinder | 7.5-1 |
| 283 (V8) | 1564859 | 3814480 | 2nd Last Cylinder | 7.5-1 |
| 283 (V8) | 1564435 | 3795896 | 2nd Last Cylinder | 9.25-1 |