Running 91/95/98 Octane - Will A Tune Remove The Flexibility

[FGED UP]

my ute is tuned to 98, the other day my old man took it out filled with 91 unknowingly. I went out the next day and could hear a ticking noise took it to my tuner straight away. He said someone filled your car up with 91(think he called it pinging), had I giving it a good squirt it could have snapped pistons or put holes in the engine.

[wa g6et]

Maybe a tuner can jump in here to answer the question.

I too would like to know how come a Late model camira tuned wirh VCM or the like has "91 and 95 fall back tables" buit in the tune. Can someone explain what this means and how come our turbos don't do the same when tuned?

[ratter]

commodores once tuned do not always have the ability to run on low octane fuel, it depends on how they are tuned, but a Late model camira has wto different spark tables that it will work from depending on knock events, the falcon ecu just pulls spark at a set amount based on a knock even

[wa g6et]

Thanks Ratter. Is it possible at all to have these multiple spark tables in our Fords?

[discostig]

Think you'd need a whole new ECU? If I'm reading things right.

[ratter]

no it can't be done to our ecu's, we do not modify things but adjust what is already there, we can not add to it