Currently in 2 minds at the moment. I'm about to order a stack of go fast bits for my wagon that will see me fry standard clutches. I'm virtually set on a UFI clutch that will hold 800Nm and 300+ rwhp, not that I want to go this far. But I will be venturing into the lower area of where some have been having crank failure issues under certain conditions.

From what I've learnt and other have worked out is that the crank failures are due to harmonics as opposed to too much power. The increase in power simply lets the engine operate freely in the rev range that generates these harmonics around 3,800rpm give or take.

It appears as though there are a couple of things which influence this.

1) reducing the weight of the flywheel/clutch assembly seems to help.
2) flywheel material that helps absorb harmonics verses reflecting them back along the crank seems to help
3) upgrading the dampener on the front of the crank seems to help.

As a result you can get these wonderful sexy looking aluminium flywheels that are approx 6.5kg lighter than the standard cast item. They feature a bolt in wear plate. They're not cheap and would ordinarily fall into the "do it later" category, but I don't fancy pulling the gearbox out multiple times. I'm looking at it from an engine insurance perspective.

Thoughts?