Rod failed because I was doing standing burnouts for a while. and then when I released the brakes and took a little drift turn the oil moved to much in the oil pan and it lost pressure resulting in drying out the bearing.
Note : I really did a long standing burnout and alot of drifting before it failed,
it was definitly nothing wrong with the design of the M42 in general,
I really really wanted this turbo conversion to happen, but the cost is just to high to get it all going again,
I´m starting another 1800cc Dohc Turbo engine swap into my E30,
It´s a non bmw motor and I´ll post some pics when I´m done,
the motor is really similar to the M42 .