StealthNB

Hyper's car is more badass than most of the cars I have seen on the forums and according to his build thread he doesn"t plan to use his coolant re-reroute anymore.

Please don't deviate the conversation to something else, and what about debating on using a catch can with -10an breather line from valve cover - catch can to down pipe??

Sirnixalot

there was great debate on this over on the dsm forums (i used to have an evo 3)

Consensus was to swap out the pcv for a 3/8" check valve and run a baffled and filtered catch can which reconnects to the intake. Those motors dump tons of oil in the head which causes issues when venting any pressure from the valve cover, people started to vent from an inspection hole on the block as well as the dipstick. This was also just before the forward facing turbo became a craze and everyone just went with huge lines to a VTA setup.

While not the same motor the same basic principles apply.


Suction tube on turbo intake


Inside shot of the suction tube. Same concept as the vibrant piece.


I deleted the baffles in the valve cover and just ran a splash guard


Said baffled and filtered can which I am reusing on the Miata

In the end I did not get to log pressures but on a freshly built motor after 1500 miles the can was clean as was the intake.

williams805

iTrader: (2)

I run a catch can on each side. I put 6k miles on with no boost and never saw a drop of oil in the driver side can. 150 miles while boosted produced a little oil in the driver side can. So wherever you don't want oil, put a catch can.

IcantDo55

iTrader: (11)

Whats the MSM use? Its a factory turbo, how Mazda deal with PCV.

I have two but have not started taking them apart yet to see how it works but from what I remember it has a baffled tank with drain back to pan.

fooger03

iTrader: (2)

I *believe* the MSM setup is the following: The MSM uses a PCV "catch drain". Gasses are expended out of the PCV out port in the valve cover and then pass to a separator can which separates the liquids from the gasses. The gasses then pass through the PCV valve and make their way to the intake. The liquids that get separated travel downward through a pipe and make their way back to the oil pan, similar to the way our turbo drain lines return to the oil pan. I suspect that this drains to a location below the oil level though.

OGRacing

iTrader: (1)

i did a little experiment that involves the vibrant crank case evacuation kit. remember i have a ls1 and i can listen to drag racers tricks with a little more confidence.




i removed the pcv off my engine due to a ton of oil that gets dumped into the intake. i replaced it with a Joes-racing-dry-sump-catch-can. after driving around with it, i noticed the catch can would vent off some really nasty smells and fill the cab with blow by/exhaust. so i went looking for an alternate arrangement. i found on yellow bullet (drag forum) that guys where using the crank case evacuation kits to pull a vacuum. i don't care about the added hp of having a crankcase under vacuum. I just wanted the blow by to be vented somewhere not under my hood, i gave it a shot.

i welded the kit into my headers, added a check valve, and tested it. it pulled a large vacuum under deceleration. it pulled about 5 in of vac. worried i had too much back pressure i moved the kit and plumbed it 12" away from the exhaust tip. behind the muffler. same thing 5in under deceleration. under idle and driving around it would pull between 1 and .5 in. seeing the vac i felt confident that the air was moving the the correct direction and was happy to test it out on a track.

I took the car out to Daytona this weekend. thing worked great, fumes where gone. the only problem was the line was so long it filled up with oil. coming out of turn 5 i blew 1/2qt of oil threw my exhaust. huge bellow of smoke and got blacked flagged. i had to go back to the old catch can to finish my runs. i'm going to add an oil air separator and continue using the evac kit.

StealthNB

Thanks for sharing info OG Racing, I am going to attempt to build a similar setup but for a turbo car with the purpose to eliminate the nasty smells from the VTA catch can.


Quick question what size line did you use use for plumbing to the exhaust?

greeenteeee

Just to add, this is with a simple Husky catch can between the PCV and intake manifold. N/A engine, was a daily and saw regular track use (until I got a Miata).

BEFORE pic (left) was in 07/08 with ~75k miles and pulled it off recently now at 129k miles to take the AFTER pic (right).

In the BEFORE pic (left), I am not sure if I took the picture before or after cleaning it (can only clean so well inside a manifold), but regardless, 7+ years/55k miles later, it is not that dirty especially compared to some pictures I've seen of some VICS manifolds taken apart to clean the EGR passages.



It is an N/A engine, so take it as you may, but in my eyes, catch can between PCV and IM seems to work well enough. Of course, FI applications will be different.

OGRacing

iTrader: (1)

the vibrant thing-ama-bob is a -10an line. i had some aluminum hard line sitting around and ran that the rear axle, then used 12" of braided stainless that also i had lying around. i did need to use a -10 to -6 to pick up the 3/8 hose that comes off the valve covers.

Joe Perez

iTrader: (8)

While down in the basement recently, I happened to take notice of the crankcase ventilation provisions on the V-12 engine which powers one of our backup generators:






Not much to it. I'm looking, in particular, at the pipe which comes off of one of the rocker covers on each side, and just leads down to the floor. In the first picture, you can see a puddle just below this tube.

OGRacing

iTrader: (1)

you have a V12 in the basement?

Joe Perez

iTrader: (8)

Yes, I have a turbocharged Caterpillar V12 in the basement, as shown above. Why?

OGRacing

iTrader: (1)

just not a normal thing to see in a residential basement.

Joe Perez

iTrader: (8)

You'd prefer I keep it in the living room?

jmann

Me wonder also???? Must be one hell of a res. to require a 12 cyl cummins.

Joe Perez

iTrader: (8)

? The big generator uses a Cat. The little one (inline-6) is a Cummins:

sixshooter

iTrader: (12)

Cue Deezums calling Caterpillar engineers "stupid" for it being VTA instead of sucking the oil vapor and contaminants into the engine to make hard carbon deposits on the valves and pistons.

"But how does it breathe in fresh air?"
It doesn't. It is an artificial construct to say that it needs to. What it does need is to be able to release the operational blow-by pressure from the crankcase so that the seals are not pushed out.

And that Cummins in the other post is a 5.9. One version of that particular series occasionally had problems with leaky timing cover seals. Its breather tube is on the side on the pushrod cover and hangs down behind the little blue hoses. There is no inlet for "fresh air."

jmann

Since your sig is in NYC you must live in the Trump Tower to have those for backup

Joe Perez

iTrader: (8)

I don't recall that we've ever had leakage problems with the little one. It's only got about 170 hours on it, but it's been sitting there since the early 90s.

jmann

No one said that VTA wouldn't work. Those diesels are probably turning around 2000 rpm with fairly low boost compared to some race engine at 7 to 9000 with a bunch of boost. I guess all these race teams that run a vac pump don't have a clue as to what is a optimal system?