Topic: Crank case pressure (Read 12945 times)

d-rail · « **on:** April 17, 2009, 04:30:30 AM »

I'm cunt hair close to finishing my turbo setup, but before calling it good on my D16Z6 I'm wanting to make sure my thoughts on venting the crank case are ok. If I just run a like from the black box on the back side of my block to my vent case is that enough ventilation? Thanks.

BoostForLife · « **Reply #1 on:** April 17, 2009, 04:37:08 AM »

remove the black box and find a 1/2" hose fitting or a plug for it. There usually 2 more big plugs on the back of the block, remove those and find a 1/2" barbed fitting for them. Run at least 1/2" hoses for each, tap one or two more hoses into the VC. Either make some shit like a catch can to collect the oil from gases, or run all the hoses to the ground.

Do your catch can / crank ventilation setup before you put the motor in the car, because it's a PITA once the motor is in the car.

trevor72 · « **Reply #2 on:** April 17, 2009, 04:53:21 AM »

IMO even a catch can is not sufficient for a boosted app, anything racey should have close to neg crank case press driven by the exhaust/vac pump or what ever your budget allows. its horsepower and ring seal we're talking about here boys.

BoostForLife · « **Reply #3 on:** April 17, 2009, 05:13:05 AM »

I hate the exhaust setups,
only ballers run vaccum pumps, and guess what. We're not baller on RHMT, nigga. We make shit work.

onlyflash944 · « **Reply #4 on:** April 17, 2009, 07:33:41 AM »

Quote from: BoostForLife on April 17, 2009, 05:13:05 AM

I hate the exhaust setups,
only ballers run vaccum pumps, and guess what. We're not baller on RHMT, nigga. We make shit work.

but what if we found a cheap as shit vac pump. then we could make baller shit work. research time

Logan76 · « **Reply #5 on:** April 17, 2009, 11:49:07 AM »

I'm sure one of you guys could find a way to nigger rig this and make it work lol.

http://www.dream-models.com/eco/vacuumpump.html

92CXyD · « **Reply #6 on:** April 17, 2009, 12:28:38 PM »

Quote from: BoostForLife on April 17, 2009, 04:37:08 AM

remove the black box and find a 1/2" hose fitting or a plug for it. There usually 2 more big plugs on the back of the block, remove those and find a 1/2" barbed fitting for them. Run at least 1/2" hoses for each, tap one or two more hoses into the VC. Either make some shit like a catch can to collect the oil from gases, or run all the hoses to the ground.

Do your catch can / crank ventilation setup before you put the motor in the car, because it's a PITA once the motor is in the car.

Any picts on this?

I'm about to button up d16z6/y8 before putting it in my car I would like to get done.

BoostForLife · « **Reply #7 on:** April 17, 2009, 04:02:12 PM »

I don't know the exact location of these on the d-series, only the b18 blocks I know.
Just look on the back side of the block, there will be a couple of huge plugs screwed in there. Take them out and find a fitting or two to put a hose on them. It's actually very simple once you get the idea of it.

89hatchsir · « **Reply #8 on:** April 17, 2009, 08:33:02 PM »

I'll post this for the pics only. Shit is too expensive to buy. These take the place of the 14mm plugs on the backside of the block.
http://www.z10eng.com/catalog/product_info.php?cPath=22&products_id=42

Or you can buy prelude fittings from honda. That's what I did. #2 and #17 in the picture. Look to be 1/2in. You need to get a fitting and a washer for each. Part #'s 11107-PK2-003 plug and 12207-634-300 washer

http://www.hondaautomotiveparts.com/auto/jsp/mws/prddisplay.jsp?inputstate=5&catcgry1=PRELUDE&catcgry2=1994&catcgry3=2DR+SIVTEC&catcgry4=KA5MT&catcgry5=CYLINDER+BLOCK-OIL+PAN

Joseph Davis · « **Reply #9 on:** April 18, 2009, 09:31:19 AM »

boostforlife, NEVER run your block vents to the ground. The block vents are centered on the oil drains from the head, and it takes about two high rpm pulls to dump all your oil onto the ground.

All vents should be baffled, and any block vents should have drain(s) T'd in. Stock valvecover vent is semiadequately vented inside the valvecover, but unless you PUT a baffle in there's not going to be one so choose (modify) your catchcans wisely.

imburne · « **Reply #10 on:** April 18, 2009, 02:59:23 PM »

What do you mean by a baffle JD?

Joseph Davis · « **Reply #11 on:** April 18, 2009, 04:48:51 PM »

Who knows? I'm pretty baffled by what comes out of my mouth sometimes, too.

imburne · « **Reply #12 on:** April 18, 2009, 05:39:27 PM »

Baffle Mouth

BoostForLife · « **Reply #13 on:** April 19, 2009, 12:22:10 AM »

Quote from: Joseph Davis on April 18, 2009, 09:31:19 AM

boostforlife, NEVER run your block vents to the ground. The block vents are centered on the oil drains from the head, and it takes about two high rpm pulls to dump all your oil onto the ground.

All vents should be baffled, and any block vents should have drain(s) T'd in. Stock valvecover vent is semiadequately vented inside the valvecover, but unless you PUT a baffle in there's not going to be one so choose (modify) your catchcans wisely.

Thanks for more info. This is what makes me spend all of my free time on RHMT and get info from JD, mostly.

Here's a good DIY on a homemade catchcan. The only problem I see with it is that the pressure has nowhere to, which means he should replace the cap with a filter.
http://www.aaronreedbaker.com/oil.html

Here's an example of the baffle. Pretty much baffle filters out oil from the vapors. That's the whole purpose of the catch can is to catch the oil
Source: http://forums.vwvortex.com/zerothread?id=4289230

Joseph Davis · « **Reply #14 on:** April 19, 2009, 06:21:02 AM »

So a plug is a baffle?

MTZ · « **Reply #15 on:** April 19, 2009, 10:09:36 AM »

Quote from: Joseph Davis on April 18, 2009, 04:48:51 PM

Who knows? I'm pretty baffled by what comes out of my mouth sometimes, too.

this thread is 2 funny

jarebear667 · « **Reply #16 on:** April 19, 2009, 02:15:06 PM »

use your turbo inlet as a vacuum source. after the can.... its what i did. everything worked well. except the dirty air it would draw in.. defeating the purpose in a way.

VW bugs (old school ones)have 12 volt vaccum pumps

optimal vacuum should be 12-15 inches of mercury.

LIST OF CARS WITH PUMPS
http://users.sfo.com/~eagle/figs/vacpump/vac.html
http://www.evconvert.com/article/electric-vacuum-pump

idea on what kinda of volume they can pump i am not sure.

discuss?

Joseph Davis · « **Reply #17 on:** April 19, 2009, 02:25:19 PM »

No vac pump shizzle, please. That is a form of failure.

92CXyD · « **Reply #18 on:** April 19, 2009, 02:36:17 PM »

Quote from: Joseph Davis on April 19, 2009, 02:25:19 PM

No vac pump shizzle, please. That is a form of failure.

How is that when some racecars use them to stabilze ring sealing. (NeckCar ;D)

Plus if you have less mass of air under the pistons you have less hp required. ;D

Joseph Davis · « **Reply #19 on:** April 19, 2009, 07:49:06 PM »

Did you read any of the SDRAWEROF vac pump shizzle thread? Where he touted a pump that couldn't evacuate a toddler's pee hole, with the toddler helping? Failure.

It's been said for years, but you refuse to listen: slashcut in the exhaust. Since the era of carbs has died no one understands venturi effect.

Conceptz-X · « **Reply #20 on:** April 19, 2009, 08:23:02 PM »

How about http://www.jegs.com/i/Moroso/710/97800/10002/-1

I have dry sump shit layin around for my future projects.

d-rail · « **Reply #21 on:** April 19, 2009, 10:54:13 PM »

I think what I'm going to do is take the black box off, the run a half in nylon line to a steel tube that is slash cut to the exhaust. After reading all the input I believe that'll work best.

MantisX · « **Reply #22 on:** April 20, 2009, 10:08:04 AM »

Wont a slashcut fail track inspections if the can fills up and it spits oil out the exhaust?

Robb · « **Reply #23 on:** April 20, 2009, 10:12:44 AM »

Quote from: MantisX on April 20, 2009, 10:08:04 AM

Wont a slashcut fail track inspections if the can fills up and it spits oil out the exhaust?

If your engine is in semi-decent shape you wont fill the catch can in the amount of time it would take to get the car thru inspection...

d-rail · « **Reply #24 on:** April 20, 2009, 10:38:05 AM »

It'd be alot of oil to fill up my catch can.

patsmx5 · « **Reply #25 on:** April 20, 2009, 10:44:09 AM »

I gotta do some more vents and shit one day. I will say it's important that your catchcan isn't too restrictive, else it will cause too much backpressure and it will accumulate with oil quicker.

MantisX · « **Reply #26 on:** April 20, 2009, 10:55:58 AM »

Quote from: Robb on April 20, 2009, 10:12:44 AM

Quote from: MantisX on April 20, 2009, 10:08:04 AM
Wont a slashcut fail track inspections if the can fills up and it spits oil out the exhaust?

If your engine is in semi-decent shape you wont fill the catch can in the amount of time it would take to get the car thru inspection...

Cool so just drain it after each run for good measure. Im going to talk with my exhaust guy and give this a go. I guess if I hate it I can just hack it off and seal up the hole.

MantisX

jarebear667 · « **Reply #27 on:** April 20, 2009, 11:08:36 AM »

has to be a 45 degree angle (or so) i believe into the exhaust with the tube having an angle cut on it

turbob16hatch · « **Reply #28 on:** April 20, 2009, 02:03:20 PM »

i'm guessing you angle the slash towards the outlet on the exhaust?

onlyflash944 · « **Reply #29 on:** April 20, 2009, 02:20:35 PM »

the angle points down stream

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---------------------> exhaust flow

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Author Topic: Crank case pressure (Read 12945 times)

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