Powerflex Mk4 - Non
Join Date: Jul 2011
Location: United Kingdom
Many people have had the work done on this forum, and yes, no downsides. Essentially, the engine is the GM 5 Cylinder block found in many cars on the road from Vauxhaul to Volvo. Its a very solid, reliable and powerful engine that the EU decided needed to be quiet, sootless and generally kind to trees. Now, I like trees as much as the next man, but if strangling my engine to save one is the answer, I say cut them all down!
The short version is this:
EGR = Exhaust Gas Recirculation Valve. It takes exhaust gas at low RPM and feeds it back into the engine to reduce the burn rate and slow it down, saving a butterfly in outer Mongolia.
DPF = Diesel Particulate Filter. It catches all your soot, stores it, slowly strangling the exhaust gas flow and engines ability to breathe until its full, then it uses your engine oil to set it on fire (regeneration), and starts again, so you always have a strangle on your performance. Most noticeable if you drive short journies often as they get clogged. This one is good for 1 tree per lifetime I think.
So, take that crap off the engine and you get better efficiency (good for 7-10MPG increase) and your able to wind up the boost on the turbo which equates to more power.
Too good to be true? or just good engineering destroyed by Brussels.