Dill wrote:I have heard about reseting ECU's on higher octane fuel, do you know if it works, or if its a load of bolx???This will only work if your ECU is tuned for 98RON fuel. I believe the latest 911s have this feature and will use the knock sensor to retard timing on lesser fuels. However unless your ECU is mapped/designed this way, using higher octane is pointless. THe additives will help to keep your engine clean though.....
Its supposed to work like this,
1 Run till nearly empty, then fill a couple of times with 98 RON fuel
2 Now reset your ECU, this is supposed to re-adjust itself to the higher octane fuel, (advance ignition timing etc i think)
Now you're supposed to get marginally more power! Obviously keeping on Shell optimax (98 RON)
Like I said I've heard about this, Is it true though?
I also believe that knock is more likely when engine temp gets high - could it be that use of 98 RON in the summer/trackdays might give some advantages.....?