Originally Posted by OriginalOpelGTOwner
Thanks Bob. My vacuum gauge measures in inches of Hg as well. I have no idea why I typed mm of Hg.
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No problem. It amazes me sometimes at the fact we still use Imperial measuring units. Metric really is easier, and all but 4 countries in the world use it. Funny how we as a nation seem to universally embrace new technologies at the drop of a hat (computers/phones/TV) but are scared of counting by units of ten...
BTW, a bump of the ignition timing and a fine tune of the carburetor and I'll bet you're right at 20-21" with that engine.