" Thanks for response. I thought he was using the tial mvr 44 and it has -4an ports in the actuator for coolant. I had researched them as I was thinking of building my own st kit. Probably going Vargas Stage 3 but still haven't made up my mind yet. One way or another I'm going larger turbo/turbos in the near future. "
I am on the stock fluid and the level of noise you described is what I have found to be the norm. It doesn't get noticeable until I am in a drive through or the ac is on. It is the same noise that all manual bmw's have when they shut off and the clutch is out. It is most likely a spherical ball bearing that is causing this noise.
I like your reference to a spherical ball bearing ;-)
The explanation for the noise is in the link I provided above in post 23 .
" The same engine with 367bhp will make its way in 2015 gl450, as mercedes has been sying for a while that the v8 in gl450 will be replaced by the v6 with the same output as the v8. I was just hoping that 329bhp will be detuned in c400 and would be a bargain for some crazy bolt ons numbers. "
" @Xyruss, i just did a quick google search for the code you said had no description, its coming up as "2C6A - AfterCat O2 sensors switched." So that is likely your issue. Swap the post cat 02 sensors, reset the DME and give it another go. If it limps again, just check codes and go from there. It's unlikely anything is seriously wrong, just little things. "
I didn't say they were the same, I said outcomes can be virtually identical. It really depends on goals and setup. I'm well aware of the handful of changes they've made, they are very useful to those who need them. Cobb engineers are good at their job But not everybody needs the extras. I'm a supporter of Cobb don't get me wrong (owned one on two cars) but OP has a jb4 so many of those added lines of hex wouldn't even matter for him since many changes are for boost response and boost up high afaik.
End of the day Cobb is superior but results are results. If I was OP I'd download both and poke around.
Biggest issue with Open source flash is the missing logging parameters that allow you to dial in boost control. I stopped paying attention, but still haven't seen anyone run more boost than the standard OTS maps that Vishnu provides (without a piggy).
The trend has been to completely ignore boost control and just raise timing as much as possible... "