Its funny how I find myself very protective of our 3cly 1.5liter engines. Things like always switching it on in advance when stationary at lights to give the oil pressure/temp a chance, when I know I’m going to be using later in that trip. I also wouldn’t dream of trying to eek more bhp out of the unit…..as it seems so highly stressed as stock.
However, if you simply doubled the unit to 3.0L straight 6 with 460bhp, so with exactly the same power/litre, bizarrely I’d be much more relaxed about tuning despite it being no less stressed.
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