Posted by Jeremy Horvath [108.162.221.175] on Thursday, September 14, 2017 at 07:11:05 :
In Reply to: OT, but flathead Octane posted by Gary in CO [162.158.69.162] on Wednesday, September 13, 2017 at 20:31:08 :
That's about the only real advantage that I see to it. It's not going to be as efficient in a low compression engine.
However, Dave's '49 got spark knock running up WV hills on low octane. High octane made it quiet right down. That was right before it blew a head gasket. I suspect that it had some carbon deposits and timing was possibly advanced a bit to far.
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