[Joshboody]

Originally Posted by dzenno

It is that #10 gasket that deteriorated on my car over time, a plastic piece of intake tube broke thereafter and went into the compressor damaging the rear RB turbo...highly suggest people change that gasket when upgrading/changing turbos...

cool stuff dave@bsh...what about looking into an upgraded valve cover solution that integrates an oil catch can...that would be the most complete solution on the market...not cheap but definitely would be great if the valve cover and its cyclonic oil separator is analyzed by you guys to see if it can be improved upon...the other side of things that would be nice if you guys considered it in your design is trying to see if you could filter the "other" checkvalve which is open to vacuum from the manifold when the car isn't boosting...that one causes oil from the crankcase to be vacuumed out and deposited right on the intake valves becoming the #1 cause of carbon buildup on this DI platform...now that would rock!

this would be nice. The check valve can be accessed with the VC on. So maybe add a oil/air separator, drain, filter... something that can be screwed in the back of the VC instead of the cap that's there now. If needed you may have to remove the restrictor (assuming idle, cruise isn't effected) built into the VC for more flow... this would make things more complicated, but worth it. DZ probably has more insight here since he viewed everything first hand.

[MBaldi]

Hey Everyone,

Just a quick update. I cleaned my valves last weekend as we've had some awesome weather here in NJ. Since installing the AR Designs Catch Can about 10,000 miles ago (see previous post with custom bracket and pics), my intercooler is perfectly clean and the catch can is catching all oil from PCV#1! However, the PCV#2 continues to dump oil directly onto the valves. In response to the posts from BSH, I would focus more of your development time on a fully integrated system that filters blowby from BOTH check valves instead of tapping into the valve cover. If someone develops that system, I am in! Further research with some tech guys I know has confirmed that the slight vacuum added by PCV #2 is beneficial to the gravity fed oil system of our turbos (this may arguably effect the overall turbo lifespan). This was covered a while back in this forum, and I originally had my CV#2 capped but have since uncapped it. My fear of tapping right into the valve cover to capture blowby gases is that you may loose some of the vacuum generated by the PCV#2 passage. In addition, I agree that the cyclonic separators obviously suck in this car, but they definitely separate SOME oil. This may be why the BSH prototype is catching so much oil. What are your thoughts?

[pwr hungry]

Yes, I am trying to revive this thread, as it never got anywhere after all of it's attention. Has anyone looked into electronic vacuum pumps and electronic vacuum regulators to maintain a predetermined amount of vacuum throughout the rpm band and regardless of turbos used or boost, while blocking off the cv#2 that flows through the cyclone separators and back into the intake manifold?

The way it would work is, block off cv#2(intake manifold vacuum source), connect electronic vacuum regulator to cv#3(rear turbo inlet vacuum source), run hose from vacuum regulator to electronic vacuum pump, then run hose to to catch can/oil separator, place breather filter on other side of catch can. From what I have read here and elsewhere, ~10-13" vacuum is all we need to maintain for optimal conditions.

I'm going to be replacing my valve cover gasket hear in the next month or so. I plan on taking all the measurements needed to model a redesign for the valve cover to eliminate the internal pcv ports in order to redirect them externally and also to accommodate a coil on plug cover like the Honda engines have. Later part should help with noise insulation(injector tick) and be a lot better looking than the factory version. I'll post pics once it's modeled and I should be able to get all the mill work done at work(fingers crossed).

[pwr hungry]

Or possibly a wastegate style regulator using a spring to keep the valve closed to atmosphere unless the pump pulled a vacuum higher than the spring tension, opening the valve to pull outside air as well to keep the vacuum at a max and safe level.

[3000GT MR]

I'm in the middle of gathering parts for a new mod i was going to test. Basically what you said about blocking off the "NA mode" portion of the pcv and running an exhaust venturi with a regulator for the vacuum. I may keep the occ in been to help with the oil going into the exhaust. My valves look like crap after 10k miles of driving after cleaning the valves and installing a occ. My stock turbos never really leaked oil. My occ caught about 10cc's of fluid in 10k. If call that healthy. The Little holes in the intake are soaked with oil.

[pwr hungry]

Originally Posted by 3000GT MR

I'm in the middle of gathering parts for a new mod i was going to test. Basically what you said about blocking off the "NA mode" portion of the pcv and running an exhaust venturi with a regulator for the vacuum. I may keep the occ in been to help with the oil going into the exhaust. My valves look like crap after 10k miles of driving after cleaning the valves and installing a occ. My stock turbos never really leaked oil. My occ caught about 10cc's of fluid in 10k. If call that healthy. The Little holes in the intake are soaked with oil.

Yeah, my valves were by far the worst I have seen wen I cleaned them around 80k miles. Going back to the exhaust venturi with a vacuum regulator does soun like a nice solution. I wonder if it would pull enough vacuum at idle though? You should definitely post up what you have and/or what you are planning on trying out.

I'm also curious to see what your car is sunning vacuum wise with the single turbo setup. That's one thing I'm definitely "concerned" about for when my single gets here.

[3000GT MR]

It may be a little while. I have a lot going on in the next month but I'm doing a lot of the research and thought behind it so hopefully it's a one and done deal. My idea for it is i have 3 places i could put the venturi which is about the size of a o2 bung. One would be where the exhaust O.D. is 3" off the turbo. 2 would be where the exhaust splits to mate with the factory exhaust with the O.D. being 2.5" or 3 further aft where my VRSF goes to 3.5". Ideally. The smaller diameter the better since velocity will increase making the venturi more effective. Down side is heat. The smaller diameter the closer to the turbo it is. The venturi I'm looking at is vibrants pcv venturi. All the reviews I've read people are saying how much vacuum it's pulling. Even installed on v8's. It also utilizes an-10 so i could make a rigid line extending away from heat before it turns into a rubber hose.

http://vibrantperformance.com/catalo...oducts_id=1243

[3000GT MR]

Turbo set up should make a difference. Our main concern is off boost. Vacuum numbers should all be about the same. During boost i bet the single can pull more vacuum just due to the design. You have 1 big vacuum pump vs 1 itty-bitty vacuum. I plan on just running one pcv system for both modes, hence the exhaust idea

[pwr hungry]

Originally Posted by 3000GT MR

Turbo set up should make a difference. Our main concern is off boost. Vacuum numbers should all be about the same. During boost i bet the single can pull more vacuum just due to the design. You have 1 big vacuum pump vs 1 itty-bitty vacuum. I plan on just running one pcv system for both modes, hence the exhaust idea

That's a good idea, and I agree with you on all your thoughts so far. The trick would be dialing in a vacuum regulator or finding one that will work to limit the amount of vacuum drawn on the engine to ~12-15".

[Ed_Mitchell]

Originally Posted by 3000GT MR

Turbo set up should make a difference. Our main concern is off boost. Vacuum numbers should all be about the same. During boost i bet the single can pull more vacuum just due to the design. You have 1 big vacuum pump vs 1 itty-bitty vacuum. I plan on just running one pcv system for both modes, hence the exhaust idea

Did you ever complete this? What was the outcome?

[3000GT MR]

Originally Posted by Ed_Mitchell

Did you ever complete this? What was the outcome?

Yes, I've had it installed since September on a stock turbo'd car. I had the intake mani off after a race event I did in mid September and everything looked great then. Other than that I haven't payed much attention to it. I plan on doing a full analysis of it when I put the ST kit on towards the end of this month or beginning of January. It would at least give me 3 solid months of testing. I've just been really busy and haven't really thought about it.

[Ingeniator]

Originally Posted by 3000GT MR

Yes, I've had it installed since September on a stock turbo'd car. I had the intake mani off after a race event I did in mid September and everything looked great then. Other than that I haven't payed much attention to it. I plan on doing a full analysis of it when I put the ST kit on towards the end of this month or beginning of January. It would at least give me 3 solid months of testing. I've just been really busy and haven't really thought about it.

You measured the vacuum/pressure on the valves yet with this. Any mods to the valve cover to seal the NA routing? You using a vacuum breaker?

[3000GT MR]

Vacuum sources all stayed the same. Only difference is the addition of a custom catch can that is really unrestricted. I don't anticipate there being a vacuum difference but will eventually measure.

[Ingeniator]

Originally Posted by 3000GT MR

Vacuum sources all stayed the same. Only difference is the addition of a custom catch can that is really unrestricted. I don't anticipate there being a vacuum difference but will eventually measure.

Yeah I meant the literal valves ie valve cover and crankcase. PWR hungry's test show positive pressure and tony's motor was blowing oil everywhere when his rings started going. I'm just not sure how much vacuum a venturi will pull on this motor.

[3000GT MR]

Who said anything about me actually using a venturi? You'd be very surprised how simple the solution could be

[Ed_Mitchell]

Originally Posted by 3000GT MR

Yes, I've had it installed since September on a stock turbo'd car. I had the intake mani off after a race event I did in mid September and everything looked great then. Other than that I haven't payed much attention to it. I plan on doing a full analysis of it when I put the ST kit on towards the end of this month or beginning of January. It would at least give me 3 solid months of testing. I've just been really busy and haven't really thought about it.

Thanks for the reply.

I'm getting ready to start assembling the parts to do this and didnt want to reinvent the wheel if a proven system was already working.

[The Convert]

Originally Posted by Ed_Mitchell

Thanks for the reply.

I'm getting ready to start assembling the parts to do this and didnt want to reinvent the wheel if a proven system was already working.

Nothing has been proven to maintain vacuum under higher power levels than stock. As far as I know, only 3 people have actually done pressure/vacuum tests with a gauge...DZenno, PWR Hungry, and myself. All showed positive pressure at elevated power levels.

Factory spec is around 5" vacuum. A proper non OEM solution would maintain 5-8" vacuum throughout the entire operating range.

[marconi118]

then we need a vacuum pump

Vargas seems to use the vacuum pump already on the engine for turbo control and brake

any more detail on this?

[3000GT MR]

Originally Posted by The Convert

Nothing has been proven to maintain vacuum under higher power levels than stock. As far as I know, only 3 people have actually done pressure/vacuum tests with a gauge...DZenno, PWR Hungry, and myself. All showed positive pressure at elevated power levels.

Factory spec is around 5" vacuum. A proper non OEM solution would maintain 5-8" vacuum throughout the entire operating range.

3 people!?

[The Convert]

Originally Posted by marconi118

then we need a vacuum pump

Vargas seems to use the vacuum pump already on the engine for turbo control and brake

any more detail on this?

Tony is relying on the stock vacuum system, yes. However, Tony is also starting to see how that is not a good idea as well. See if he'll chime in about the woes he's had.

[Segundo]

Hello folks,
I'm part owner of Velocity Performance Engineering in Dallas TX. We about to begin development of a new series of catch cans using real engineers rather than the usual junk built by a fellow that thinks he's an engineer. I would like to gather some varied data from multiple users. I have a series of data that would be beneficial to the design. Some of this we are collecting on my 2011 BMW Z4 Sdrive35is, but my Z is heavily upgraded and may not prove to be the best example. The following are the data I could use.

MIN Normal Max

Operating Temperature (F)

Operating Pressure (psig)

Gas flow rate (lb/hr)

Gas density (lb/ft^3)

Gas viscosity (cP)

Liquid flow rate (lb/hr)

Liquid density (lb/ft^3)

Liquid viscosity (cP)

Liquid surface tension (dyn/cm)


I would appreciate any help you fellows are able to give in collecting a large sampling. Thanks

[CircularMotion]

Why not integrate an oil filler cap with a pcv port?