Chains tend to break at the weakest link. But what is considered the weakest part of the Rocket suspension? Is it the wishbones, the bolts, the brackets on the chassis or the chassis? Claimed big BHP is largely irrelevant, it is torque that creates the load on the suspension components. It is possible that the bones etc will take higher loads but how long for? Has the possibility of continual high force and fatigue been taken into consideration? Will say 250 ft lbs of torque cause failure at the corners after just one blast off the line or many thousands? Have the potential forces created by bigger power probably coupled with bigger brakes, sticky tyres and a heavy foot been considered?
The chassis and bones were designed and tested and analysed by a structural engineering firm using data from a 1.6 100 ft lb Focus. They passed the test but we did not continue to increase loads until something burst.