Join Date: Nov 2001
Thanked 5 Times in 5 Posts
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.