Compression ratio and pressure:
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From: Mid-Missouri
Compression ratio and pressure:
If an engine has an 8.5:1 compression ratio, and you do a compression test, it reads to be about 170 psi or so.
Atmosphere pressure is 14.7 psi. The volume decreases 8.5 times the amount given initially. When you multiply 14.7 psi by 8.5, you're only getting 125 psi. Where did the extra 45 psi go?
Atmosphere pressure is 14.7 psi. The volume decreases 8.5 times the amount given initially. When you multiply 14.7 psi by 8.5, you're only getting 125 psi. Where did the extra 45 psi go?
