Compression test results wet vs dry

This topic has 1 reply, 2 voices, and was last updated 4 years, 8 months ago by KamiWolf93.

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March 10, 2020 at 5:04 pm #159440
Joshua
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I wanted to know the compression test results of my Toyota Celica 2005 1.8 VVTI,
This has a 1zz engine with 10:1 compression ratio. Results were 165psi within less than 10 psi between cylinders.

I then tested it with oil and it shot up to 225psi.

Do you think this is normal for the large increase in wet compression? The car has 82,000 miles.
March 11, 2020 at 10:11 pm #160015
KamiWolf93
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I also have the 1.8 VVTI in my mr2 roadster, 165psi is okay. For reference my engine is at 65k and has 180psi compression. Your piston rings are worn but not bad. When the engine was new it will have had around 225psi compression.
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