[Big Tom]

I updated my DIY OCC today.

The OCC is now connected to the intake instead of the breather which I used before.

The size on the hoses is now increased to 1" and they are super short. The internals are now 17 mm as a minimal through the WHOLE unit.

I've also installed the brass filter back again which I drilled a bunch of 2 mm holes in to achive maximum flow.

[dzenno]

^^^^^^^ sweet! Now that's an n54 OCC setup I really like! Great job Tom!!

[skim7x]

^^ sick dude...

[Joshboody]

nice Tom... are you using the OEM vent hose on the engine outlet? It has a check valve i think.

[dzenno]

Originally Posted by Joshboody

nice Tom... are you using the OEM vent hose on the engine outlet? It has a check valve i think.

Oh yeah, what happened with the checkvalve? Don't see it there...

[Joshboody]

i think this check valve is to prevent off boost pcv side from causing a vacuum in the boosted side (OCC side). Tom, you mentioned paper will stick to the outlet from suction. The cc cannot cause a vacuum. just my 2 cents

[cn555ic]

Big Tom...please list the parts that were needed and also where to buy the BIG TOM CATCH CAN!!!

[aus]

Really disappointed BSH hasn't responded yet...

.

[EastBayE90]

wow now that is what I'm talking about. BIG TOM OCC FTW!!!! That right there seems to take care of all of our gripes. It has short lines, huge 1" lines, recirculation. Yea only question is what happened to the check valve. This got me excited I'm ready to go part shopping tomorrow so I can throw one in myself. Thank you BIG TOM

[Transport3r]

Originally Posted by Big Tom

I updated my DIY OCC today.
[/URL]

Am I the only one that's worried about how that's suspended?

[turb0mik3]

Originally Posted by Big Tom

I updated my DIY OCC today.

The OCC is now connected to the intake instead of the breather which I used before.

The size on the hoses is now increased to 1" and they are super short. The internals are now 17 mm as a minimal through the WHOLE unit.

I've also installed the brass filter back again which I drilled a bunch of 2 mm holes in to achive maximum flow.

Awesome. As everyone else says, throw up a DIY with parts list and we are sold!!! I am new to this OCC idea and this thread has been a great read. I think it should be a sticky of some sort.

[Big Tom]

Originally Posted by Joshboody

i think this check valve is to prevent off boost pcv side from causing a vacuum in the boosted side (OCC side). Tom, you mentioned paper will stick to the outlet from suction. The cc cannot cause a vacuum. just my 2 cents

You will get vaccum from the crankcase regardless if the checkvalve is there or not.

My theory is that this checkvalve is there to prevent the boost spike coming from the DV's.
...and I'm using BOV's so I will not be affected by this issue.

[Big Tom]

Originally Posted by joshuo

Am I the only one that's worried about how that's suspended?

No worries. It's stuck between the engine and the firewall and is also resting on an edge behind the intake. It will not move.

[Former_Boosted_IS]

Originally Posted by dzenno

Former, you're asking questions and I'm pretty sure you know the answers to them. I said I just got the BSH OCC. I also said this isn't related to any specific OCC brand but a general issue with OCC setups given engine bay clearance in the back of the N54s...I get this strange feeling you're defending current OCC setups and I really don't get it!

Misfires were related to the tune, not OCC...AFR imbalance I was seeing WAS related to a restrictive RR OCC as it went away immediately after I removed the RR OCC...

Here's some info straight from fluid dynamic on impact of longer tubing, same diameter:

In terms of air flow through a tube and a changing length here's a GREAT reference:

http://www.newton.dep.anl.gov/askasc...9/eng99525.htm

If you go through it you'll easily see that length of tube directly impacts air flow and resistence and does so significantly...

In our case, tube is being extended from about say 5 inches to say 5-6 feet so about 15 times longer than stock. On top of that add the immediate bends at the PCV outlet and you'll quickly see where I'm coming from here...and then what about the baffle inside the can and details on flow there and how that impacts much needed vacuum coming from the other side (rear intake tube)

You keep mentioning 525whp and nitrous and running it for a long time and I know you're not putting milage on that car or racing it for extended periods of time as you've said this yourself. That sort of feedback on this topic is really inappropriate..

Dzenno, I have been your friend on here for a while, but your statements as of late are really lacking tact and quite rude. You are making tons of assumptions with no data whatsoever. This is no different than when people used to say you would blow the tranny at more than 350 rwtq or 14 psi of boost. I had a theory about whether a DCI or CAI would give noticeable IAT gains and didn't get on this forum throwing around theory. I datalogged a ton on my own time and posted legitimate scientific data. Until I see facts, this is nothing more than speculation. I am sorry that makes you angry to the point that you say my feedback is inappropriate, but you have not a single ounce of data at this point to support anything you are saying. I would love to see data and would support any of the findings.

The fact remains that I have run probably 8-10 bottles through my car at about 525 rwhp and never once had a misfire with my OCC.

[dzenno]

Former, I'm sorry if I sounded rude as that wasn't my intention and I'm sorry if I offended you, seriously..I've always respected your efforts in the past and stil do...when it comes to the OCC I just choose to disagree for now and if time permits I will do some testing...

I do have to correct you though and say again that my misfires were tune related. Shiv changed the mapping on the procede and they went away...this wasn't OCC related and I never said they were..

[Zasquatch]

I will restate the fact that while I had the BSH OCC installed I was experiencing a rough, lumpy, unhappy sounding idle. Since I've taken it out and put the stock tube back in, everything is smooth and happy. Coincidence? Maybe. But I don't think so. For now I will just be accepting blow-by until someone comes up with a proper solution

[Former_Boosted_IS]

Originally Posted by dzenno

Former, I'm sorry if I sounded rude as that wasn't my intention and I'm sorry if I offended you, seriously..I've always respected your efforts in the past and stil do...when it comes to the OCC I just choose to disagree for now and if time permits I will do some testing...

I do have to correct you though and say again that my misfires were tune related. Shiv changed the mapping on the procede and they went away...this wasn't OCC related and I never said they were..

Fair enough my friend. I do appreciate you clarifying that.

On a side note, any plan on getting a dual wideband setup? If I get some time, I may get the second to measure this for the community. Heck, I am lucky to have a wife that let's me do all this anyway.

[dzenno]

I just setup one lc-1 on bank2. As soon as Shiv provides me with a 2nd analog input i'll add it in a heartbeat...

[Former_Boosted_IS]

Originally Posted by dzenno

I just setup one lc-1 on bank2. As soon as Shiv provides me with a 2nd analog input i'll add it in a heartbeat...

So you are just using the analog input? How did you calibrate the input?

[dzenno]

Originally Posted by Former_Boosted_IS

So you are just using the analog input? How did you calibrate the input?

You calibrate the lc-1 on its own, both heater circuit and free air so tge sensor "smells" free air for oxygen...then on the procede you enter min/max values for scaling..

[Former_Boosted_IS]

Originally Posted by dzenno

You calibrate the lc-1 on its own, both heater circuit and free air so tge sensor "smells" free air for oxygen...then on the procede you enter min/max values for scaling..

Have you considered a digital output/log? It is very accurate.

[vasillalov]

Umm fellas, please stop jacking the thread....