[hl0m4n]

can someone tell me an estimate measurement? got an idea to upgrade the rr occ. is 20 inches per hose long enough?

[scottp999]

Originally Posted by hl0m4n

can someone tell me an estimate measurement? got an idea to upgrade the rr occ. is 20 inches per hose long enough?

I can go measure. I have not put the kit on yet. Hold on a second.

[scottp999]

Both 3/8 inch hoses are 35.5 inches. That does not include the plastic connector to the large hose.

[hl0m4n]

damn 35.5 inches, didn't think it was that long. but there is alot of slack at that length, do you think 20 inches will still work or no way in hell?

and just to be sure im asking for hose 2 & 4 lengths.

thanks guys.

[scottp999]

Have not installed yet, so don't know about slack. Yes, they are 35.5 inches long.

[ThorsHammer]

I replaced mine and went with four feet each. Gave plenty of room...so no bends or kinking.

[hl0m4n]

Originally Posted by ThorsHammer

I replaced mine and went with four feet each. Gave plenty of room...so no bends or kinking.

hey man, didn't you get the mckinney? if you did, can you post pics on how you mounted it on your 335?

[ThorsHammer]

Originally Posted by hl0m4n

hey man, didn't you get the mckinney? if you did, can you post pics on how you mounted it on your 335?

Hasn't arrived yet. Riss is installed....waiting on the McKinney. He tells me it should arrive any day now.

[scottp999]

Thanks for posting this thread. I got all my clamps on now.

I also noticed that the hardware ziplock bag had a huge hole in it and one of the tiny rubber washers (O-Ring) is missing. The box for the can also has room for it to fall out. Gotta go find some better washers now.

Really for a few more $ Riss could have avoided almost all of the customer frustration.

[hl0m4n]

Originally Posted by ThorsHammer

Hasn't arrived yet. Riss is installed....waiting on the McKinney. He tells me it should arrive any day now.

you get the can man, im mad anxious to see how it turns out

[Mad335]

Originally Posted by ThorsHammer
Hasn't arrived yet. Riss is installed....waiting on the McKinney. He tells me it should arrive any day now.

Which version of the McKinney can did you order? Did they advise you on which to take? I am also about to order one as it seems to be a "professional" device.

[ThorsHammer]

Originally Posted by hl0m4n

you get the can man, im mad anxious to see how it turns out

Yep. I painted it with a thermal black paint and mounted it yesterday.

I ended up using the Riss mouting brackets, and just did some readjusting to get it to work.

Basically, I unclipped the windshield washer filler, and used it's mount as the point to bolt on the Riss mount (again, adjusted so that it would provide the proper angle). I then threaded the worm/hose clamp that came with the McKinney through that mount, and cinched it down really really tight.

Also, I folded back/down the heat-shielding that is right there so that it made a little platform underneath the can.

Finally, I used a zip tie to connect the windshield washer filler back to it's clip/mount.

Don't know if this makes sense at all, so I'll take pictures when I can. I have to buy a new camera first. Mine finally died from being dropped for the 100th time.

Oh, and to make this work, I had to re-route the windshield filler tube underneath this thin metal bar (not sure what it's for), and when I tried the first time, the filler tube "disappeared" down into the engine and washer fluid poured out...like all of it. I finally was able to find it by probing with my hand, and was able to get it back out and around that little bar.

Again, I'm sure this makes no sense, so hopefully pics will help!

Originally Posted by Mad335

Which version of the McKinney can did you order? Did they advise you on which to take? I am also about to order one as it seems to be a "professional" device.

I got the one with the 3/8 inch, 90 degree fittings. I did this because I could retro-fit it onto my Riss Racing mounting kit/hoses. I already had a Riss Racing can installed.

[longodj]

[godot]

Originally Posted by hl0m4n

hey man, didn't you get the mckinney? if you did, can you post pics on how you mounted it on your 335?

I'll chime in here b/c I got the McKinney too.

I got the 1/2" 90-degree version, because adding several feet of hose will add resistance to flow. I figure that the factory line is 3/4"-1" for a reason, so using 3/8" hose for such a long run might just add too much back-pressure. (Compared to 3/4" factory hose, a 3/8" hose has 1/4 the cross-sectional area, then we're taking it from a foot long to 6 feet long... so that's 4 x 6 = 24 times the resistance to airflow, not including all the couplers, bends, and whatnot.)

I got a series of brass couplers from home depot that will get me from the factory hose sizes down to 1/2", then got hose from the auto parts store. Two 6' sections of 1/2" hose should be enough.

Anyway... the McKinney can is LARGE! I haven't installed yet, but I've been playing around with placements in my engine bay. If you install it where the Riss can would go, (a) it's going to be touching the heatshields and positive battery terminal and (b) you'll probably have to remove the whole can in order to empty it.

It's looking like the best placement on a stock car may be immediately behind the driver-side headlight. It looks like it will stand up there with just enough room for the hood to close, plus it's in a cooler location and is accessible. The other option would be on the engine side of the driver-side wheel well, underneath some of the other hoses that run through there. Maybe tap a hole in that sheet metal to attach a mounting bracket.

Only thing is that I'm not sure the Riss hoses will reach this location... but you can buy plastic couplers and some extra 3/8" hose from an auto parts store for less than $10 to extend the lines.

As for me, I'm about to install a CAI, which will rearrange my engine bay a little. I figure I'll end up mounting the can in some of the space adjacent to the CAI pipe; maybe strap it to the power steering reservoir or something, or maybe to the CAI pipe itself.

I'll be installing this weekend, and will try to remember to document the process!

[longodj]

Is there any actual advantage to running the larger OD tube? Performance? Longevity?

[hun77777]

[godot]

Originally Posted by longodj

Is there any actual advantage to running the larger OD tube? Performance? Longevity?

I'm not sure, and PCV valves on older (normally-aspirated) cars I've owned were always quite small... like 1/4" or so. For whatever reason, BMW decided to make this one 3/4" (i.e., 9 times the capacity), so I'm concerned about reducing it too much.

My best guess would be that in normally-aspirated cars, the intake creates suction that actively pulls blow-by gasses out of the crankcase. In our engines, the air going into the intake is pressurized by the turbos when under boost, so there's not this constant siphoning-out of the crankcase gasses. This larger hose may allow the gasses to escape in a shorter, high-volume burst once the boost drops. Maybe a smaller hose doesn't allow the gasses to escape as fast as they enter the crankcase under sustained high-boost conditions.

If that's true, then a smaller diameter probably wouldn't hurt under normal driving... but I didn't want to take any gambles.

Just a theory, tho. I'd be curious to know the "official" reason.

[longodj]

can anyone else verify this?

[brianhn1]

Originally Posted by godot

I'm not sure, and PCV valves on older (normally-aspirated) cars I've owned were always quite small... like 1/4" or so. For whatever reason, BMW decided to make this one 3/4" (i.e., 9 times the capacity), so I'm concerned about reducing it too much.

My best guess would be that in normally-aspirated cars, the intake creates suction that actively pulls blow-by gasses out of the crankcase. In our engines, the air going into the intake is pressurized by the turbos when under boost, so there's not this constant siphoning-out of the crankcase gasses. This larger hose may allow the gasses to escape in a shorter, high-volume burst once the boost drops. Maybe a smaller hose doesn't allow the gasses to escape as fast as they enter the crankcase under sustained high-boost conditions.

If that's true, then a smaller diameter probably wouldn't hurt under normal driving... but I didn't want to take any gambles.

Just a theory, tho. I'd be curious to know the "official" reason.

For our car the crankcase vent is connected to the intake BEFORE the rear turbo. Therefore it has little effect to the crankcase. However, I have found that the crankcase has vacuum, so possibly it is connected to the intake manifold through another pathway.