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What's the rated compression ratio ?

Edit ... mymopar.com says rated at 8.8 so it's closer to 8.0 , you should be able to run it on 87 ...




Maybe carboned up cause of the 91 it couldn't burn?

A carboned up engine can run bad. I bet a dose of Seafoam in the PCV would put on a real show.

I want my fair share