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post #6 of (permalink) Old 01-16-2000, 07:56 AM
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Re: 93 octane in stock engine

I run 93 in my 305 TPI all the time and I still get a pinging cruising at 75 MPH. I can accelerate or
decelerate and it stops but if I continue to maintain the same speed it pings.

My understanding was that the higher octane retarded combustion and caused it to burn longer, rather
than in a quick flash, not hotter. Kind of like one of those time released 12 hour cold medicines.

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