Lari Temmes

I'm on a train and bored. So i add my experience here. Like i told before, i added turbo (and intercooler) to my VR6 3.2 Cayenne and it was good, and it was bad. Good stuff : ME7.1.1 can handle it very well and stays in closed loop mode (with stock WBO2 sensors fitted to exhausta). No codes (expect warning code for MAF "Sudden rush of air"), fuel trims can keep up, very good for normal driving giving more snappier drive experience on low speeds. Bad stuff : On high RPM (something around >5k) MAF starts to clip, still goes fine because WBO2 sensors can h

Do you mean these are modifications are that are generally made, or that i would need to do these to make use of ethanol fuel?

Right, after testing this and that i decided to use both upstream o2 sensors. It's was actually pretty easy to put them onto my chinese exhaust manifold, just like they are on HPA exhaust manifold. That solved my o2 issue and fuel trims seem fine now and i don't get error codes. It actually runs pretty well with stock ECU. On WOT and >3500 rpm it pushes 0.6bars just fine Tried with ethanol too (50%-50%) but it was too much for stock ECU.

Additional question. Can i test run this in open loop state? All components are stock, so it should be ok?

Thank! That is very interesting. I already tried to split signal from one o2 sensor to both inputs. I had 'some' success, but got 'Lambda sensors exchanged' codes and it just didn't work. Modification to ECU that is descripted here does pretty much the same thing and since input vary a little, there is still -25/+25 issue like stated in documentation. So, i quess only option to use single O2 sensor (or both sensors in same pipe) is to make software modifications. There are some information about this for commonly used VR6 ECUs, but since this is Porsche Cayenne, there

Thanks. Can't get to that guide, but yes. Dual O2 manifold is option. However, i'm going to try splitted o2 sense signal first. See how that goes.

Hello everyone, my first post. I have little project with my Porsche Cayenne that has Porsche rebranded VR6 3.2 24V and would appreciate some help and ideas. My plan is to turbo it. It's 250hp stock and i'm simply going to stick eBay turbo on it and keep it stock as possible. Stock intake, exhaust, injectors, MAF, fuel pump etc. I did some simple calculations and stock components (like injectors) should be good for around 80-90 additional horses and 6-8psi. ECU is ME7.1.1 022906032T btw. Anyway, since i'm going to start with stock ECU (don't judge me just yet, i have my