My 06 530xi after a weekend of polishing the paint.

 

 

Sweet ride ucsbwsr!

Side question: I've read about this RB PCV thing on the E90 forums a lot. What is it exactly and why is the upgrade to it worth doing?

 

Thanks Lotus. Regarding the PCV Valve. My amateur understanding is the upgraded PCV valve helps our N54s by keeping excessive crankcase pressure (including unburnt fuel and oil) from escaping back into the intake.

I consider this modification more of a preventative measure more than performance and although it can benefit a stock n54 engine based on the condition of the stock valve, it really helps with cars running performance mods and higher boost. I am running my PCV valve in addition to the oil catch can in hopes of keeping oil out of the intake system.

Of course after all this I notice oil dripping from the charge-side of my rear turbo. Oil residue was visible on the metal belly tray and small stalactites of oil where on various engine parts leading up to the turbo. I was noticing massive amounts of white smoke out of the exhaust normally while decelerating. Car is still under CPO and they replaced my valve cover gasket but fingers crossed the smoking persists so I get some new snails. Interestingly the originals were replaced at ~60k and my current ones only have ~20k.

Anyway, I recommend the PCV valve if you are running any performance mods.

Evan

 

Thanks for the reply. Now I understand it a bit better!

 

Hmmm... I should maybe look into this PCV thing. I'm running stage 2+ Cobb maps (DP's and FMIC + intake) on my 335 for a year, but don't have an upgraded valve. What does it take to replace it? I'd have to take it to a shop to get it done.

Since Rob makes the upgraded turbos, I'd figured that most of the people using this valve were those who had gone with the upgraded turbos too.

So you think those with stock turbos, but higher stage mods, should do it too? I've got only 35,000 miles on my 2008 335.

 

I would reach out to Rob to confirm the benefit of running the PCV valve on different mod stages. There is reason to believe this PCV would be an upgrade even if the car is bone stock. I have a picture showing my stock PCV vs the RB unit in a thread elsewhere, I don't feel it is appropriate to post it here and take a detour on this thread but search my threads and it should be there.

Personally I would say anyone with a piggyback ECU (Cobb AP, JB4, etc. "Stage 1") will be running higher boost and therefore capitalize on the PCV benefits. Although there are other variables in the mix; eliminating carbon build up is probably the best attribute of the upgraded PCV valve

At any level of performance the PCV valve will only help. I love the performance mods but I have found a new appreciation in timely maintenance and mods which extend the life of my car; I have put a lot of time and money in my wagon and I want to enjoy it for a long time!

Evan

 

What modifications have you done to rear suspensions, to get that low?

I´m hitting to "suspension limiter" (right word?), on much higher stance..




And not so much off-topic, than there will be some on-topic
Few shots from last weekends bimmerparty;

 

535D Vtech Stage II - 380hp/750nm
0-100km/h under five seconds

 

My 535d M-Sport 2008
Looking for coilovers.. looks a bit to high atm