Re: Compression ratio and octane rating

Posted by hogman_2002 on March 26, 2007 at 16:55:40 from (66.196.4.200):

In Reply to: Compression ratio and octane rating posted by hogman_2002 on March 26, 2007 at 10:32:44:

My brother bought a crate engine from Jegs to put in his 81 4x4 Suburban. The spec. sheet he got with it says to run 92 octane in it. He didn't find that out until the engine was shipped to him. Now he's looking for some way to run 87 in it. I was thinking he could retard the timing a few degress and run 87 and be ok.
Like I said, the compression ratio is 9.1:1 and initial timing is set at 10 degrees BTDC.

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