I googled a bit and found this as I wanted to understand a bit more than I currently do, maybe others will find it interesting too, sorry if it's a bit nerdy but I thought it was worth the read
http://www.contactmagazine.com/Issue54/ ... asics.html
I was saying the car's only have knock control up to 4800rpm as a stock after this RPM the car doesnt have knock control. This is all in the stock ECU. If the car see's heavy knock readings it will switch to the high detonation map which has around 5 degree's timing removed.
The car that we have here that has failed hasnt had a bottom end failure from what we can see , it has had piston failure. The car had a full service prior to dyno work. 1st pull on the dyno I noticed some wrong spoke to Scott saying I think the car is running 95 Octane fuel , he spoke to the customer that confirmed it was running on 95 octane fuel.
I have a feeling that the usage of 95 octane fuel may have caused weakening of the piston's maybe due to continual detonation over a long period.
Mark