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compression ratio on a stock 1985 C20 350

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06-01-2018, 05:06 PM

G-NUT

Registered User

Join Date: Apr 2014

Location: Baldwin County, Alabama

Posts: 164

Re: compression ratio on a stock 1985 C20 350

Quote:

Originally Posted by Keith Seymore

The LT9 was the base 350 engine for Federal Emissions. Compression Ratio was 8.3:1

There was also an LS9 available for California only. Compression Ratio was 8.2:1

https://www.gmheritagecenter.com/doc...olet-Truck.pdf

K

Thanks for that. I found the spec on the link you left. I have the LT9, 350 (M). Showed me my bore, stroke, compression ratio, all kinds of good stuff.

I appreciate it.

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