Powerflex Mk4 - Non
Join Date: Jul 2011
Location: United Kingdom
for me, or at least my car, my setup (B12 + Powerflex + Vredestein Ultrac Sessanta 245/40/19) the ride is compliant and the shocks are definitely doing the absorbing. Before I had the Powerflex and after the B12 the ride did get quite harsh which in the end turned out to be the worn bushes that I had replaced with Powerflex ones. The ride has been perfect since. Large potholes dip the steering wheel no more or less than before and post modification I have never once gone over a pothole and though "*****!! that will have broke something". It only needs to be aligned once a year at a tyre change and holds its setting perfect.
The B12 kit, despite popular belief is a very good setup on the heavy 159. The shocks are not at all harsh and they provide a great ride. I drive a 250 mile each way journey every 7-10 days and have done for the last 4 months and not once do I get out after 4 hours straight of A/M roads and think "I need to buy a soft jag". Its a true pleasure to drive, super sharp steering and impecble control that has litterally saved my life through some of the worst (hurricane) weather I have had the displeasure to drive through....
Try doing the M6 through the Cumbrian mountains during Hurricane Bertha without spinning and tell me he ride is compromised.
Yes, lateral movement once absorbed by the lower bush is translated directly into the chassis, but after 35K on this setup the chassis is not creaking, groaning or shaking, nor is the car any less compliant or does it produce more road noise than before, nor has my steering rack failed (touch wood) and the benefit of that, aside from 20K from a set of 19" performance tyres on a car that has a kerb weight o 1800+ kilo's, is super reactive, pin sharp steering and handling.
I do appreciate where you are coming from Old Engineer, but would urge you to try a car with this setup to make a proper assessment. I have done 30K without the handling mods and 30K with and if I could go back in time, all 60K would have been done with the mods.