|
Doing a big end bearing is a classic sign of detonation. Ive done it before with modified Subaru STI motors. Usually caused by the motor running to lean and then detonation forces the piston down at great force and breaks the big end bearing which frequently can cause the big end itself to let go and the rod is forced through the engine block.
Its not because of the increased boost itself its because of the fuel map wasn't matched correctly and most probably leaned out at full load.
In my opinion its more likely to be caused by mail order boost increases not through custom tuning as the tuner can fully customise the fuel maps to ensure there is adequate fuel supply at all boost levels.
Its only a matter of time before these stories start to appear as is always the case with turbo cars when owners frequently with little experience modifying turbo motors get carried away with the ease at which you can get more power out of the engines. Detonation is never very far away especially with dodgy fuel but its easily avoidable with proper tuning with adequate fuel supply so the motor doesn't lean out and upgrade the injectors and fuel system if its needed.
|