The two links I posted were not intended to resolve the question of flame speed relative to octane rating, but rather to get back to the question of the choice of octane rating for an engine - the purpose of octane and its effect on fuel mileage.

Frank <img src="/forums/images/graemlins/cheers.gif" alt="" />

'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum