[sgtmudkipz]

Originally Posted by Sophisticated Redneck

Intakes are completely different on S63 & N63 however connections to the Catch cans are basically the same, the main difference is the cross connections from intake to intake the S63 has with the CCV lines. You can eliminate these and duplicate what I have done on the N63. I can post more pics if you need.

You will need a vacuum gauge to know where you are at with vacuum and to make sure everything is working right. you dont have to permanently install it. Just tap the oil filter cap like i did and run the line into the cabin through the door jam. (I can post pics on this too if you like) What you are looking for is to pull around negative 8-10 psi at idle, and to make sure that there is no boost leak back into the crank case so under acceleration with the turbos engaged it should read -1 or 0.

After this is set you can remove the vacuum gauge and put a small rubber cap on the tap you added to the oil cap.

I will say you may want to hold off on this a bit, I am going to take this to the next level and add an header evacuation system to this and route the CCV tubes that normally run to the intake to the exhaust. (Basically the tubes you see running to your intake will instead running to a pair of Bernoulli tubes welded to the lower exhaust collectors).

This is a very old-school way of having negative vacuum in the crank case without having to route the crankcase fumes back into the intake. It would also greatly simplify the CCV system

It should improve performance throughout the engine band and no more combustion gases being recycled back in to the intakes.

I do not know how this will effect the tuning (if at all), will know more this weekend, going to baseline the truck tonight and then do a before and after test. Will post results back then.

Thanks for the reply and all of the wonderful additional info. Will definitely pick up a vacuum gauge; great tip on tapping the oil cap for vacuum.

I've seen the bernoulli exhaust thing before on a mazdaspeed3 and on some older big horsepower hondas ("crank vents" ?).

With the header evacuation system I assume you just plug all the intake side stuff and then it's just crankcase <-> check valve <-> catch can <-> exhaust right? Only difference being exhaust vs intake for the vacuum source.
Does anything get deleted / capped / plugged? Intuition tells me I'll probably need to cap off the intake used as the vacuum source?

I did already order all the stuff in your BOM on the first post because I suspect my OEM lines are leaking and I'm doing coils/plugs soon. Do you think it's feasible/worthwhile to install your current setup then later switch to your new setup after you've prototyped it? Would it just be matter of plugging the intake vacuum source and hooking up to the newly tapped exhaust (and maybe moving/adding a check valve)? Or am I missing something more major.

I might end up holding off since I don't need the truck at the moment. Luckily Amazon doesn't mind accepting returns lol.

Thanks again for all your info; this platform is still a little daunting for me even with my experience wrenching on past e90s and M cars.