Originally Posted by Philip
I see what you're saying - I don't know how accurate a simulation a dyno is for that, but my car has gone 170+ on the road enough times and not gone pop.
I can see that the repeatability and accuracy of something like a Dynapack has to be a huge benefit if you're mapping a car, whether you tweak it afterwards or not.
If I was doing something like TOTB etc. a few gallons of 106 is cheap insurance in any case.
Phil
God, do people not realise that running far too high an octane fuel compared to what the engine is mapped for results in a shift in peak cylinder pressures to later in the cycle, and hence the burn finished later, including potentially so late its after the end of the combustion stroke and onto the exhaust stroke thus buring the shit out of the head.
Running on the wrong fuel is NOT insurance, its fucking stupid!