| 11. | In 1998 the compression ratio increased for a total of and.
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| 12. | Compression ratio increased to 8.5 : 1 and power increased to.
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| 13. | The maximum compression ratio that teams will run is about 15 to 1.
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| 14. | Bore is and stroke is with a compression ratio of 10 : 1.
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| 15. | Charles Kettering developed a lead additive which allowed higher compression ratios.
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| 16. | Compression ratios vary from 6 : 1 to 7 : 1.
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| 17. | This is where the term " compression ratio " comes from.
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| 18. | This means the compression ratio is smaller than the expansion ratio.
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| 19. | Bore is and stroke is with a compression ratio of 9 : 1.
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| 20. | The engine compression ratio is increased to 14 : 1.
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