DOUGMO said:i believe it is caused by the oil squirters jaming open and
bleeding off oil preuuse to the crankshaft.
replace the check valves in the squirters with new genuine ones
Thats one of the causes and the other is the set up of the clutch itself.And dont sit at the lights with your foot on the clutch.
I ran numerous 9's and the best was a 9.67@147 with the 2 litre and I was running N20 back then too, im not with the 2.4 but im thinking about it