SPOHN'S Journal II Track Demon Reborn

Sh0velMan · 06-21-2013, 11:15 PM

That PCV setup will make you run lean if you are still plumbing the output into the intake plenum.

Kingbaby · 06-22-2013, 12:16 AM

Love it!

I capped all of them.

wstar · 06-22-2013, 02:18 AM

Quote:

Originally Posted by Sh0velMan

That PCV setup will make you run lean if you are still plumbing the output into the intake plenum.

I don't think putting separate breathers on the valve cover intakes is going to affect much of anything on the other side. The other side will still be drawing from the crankcase (through a can I'd guess).

Quote:

Originally Posted by Kingbaby

I capped all of them.

I hope you don't mean you capped all of your PCV system. The engine needs to breathe or you'll build up crankcase pressure and it will cause oil seal leaks (e.g. at the front and rear of the crank).

SPOHN · 06-22-2013, 07:16 AM

As far as the PCV system goes I have filters on the intake side. Then I will be running a oil catch can vented to atmosphere while the manifold will be capped off. These are just some progress pics. Trust me, I know what I'm doing. Lol. I might not run a OCC. just let it vent as is directly from the Check valve.

Kingbaby · 06-22-2013, 08:00 AM

Yea...I capped off the bridge on the crankcase, and the one on the driver side. Keep the one on the passenger side going to the back of the intake manifold.

thought?

EDIT:

I'm NA

Sh0velMan · 06-22-2013, 11:53 AM

Quote:

Originally Posted by SPOHN

As far as the PCV system goes I have filters on the intake side. Then I will be running a oil catch can vented to atmosphere while the manifold will be capped off. These are just some progress pics. Trust me, I know what I'm doing. Lol. I might not run a OCC. just let it vent as is directly from the Check valve.

Air doesn't blow out of the outlet though, you have to put vacuum on it to draw it out.

That's why I said you'll run lean unless you plan on installing an electric vacuum pump to evacuate the crankcase.

I've tested this on my own car and confirmed that without vacuum on the PCV outlet, no air passes through the crankcase (other than blowby).

wstar · 06-22-2013, 02:23 PM

Well, if he were to vent both sides of the PCV system straight to atmosphere (through filters) and not use vacuum, it would *probably* work. I think the only downside there is that it's only the blowby pressure that will occasionally force a small amount of air out the breather side and/or PCV valves (whichever is least resistant). Thus pressure will be somewhat regulated and sane. But you won't really clean the ugly vapors out of the crankcase much either with no real flow or air exchange.

Running breathers on the intake side as pictured is fine, IMHO. It's really not much functional difference from the stock configuration where the intake air filters play the role of that breather (and as a bonus - sometimes there is flow reversal and/or backfire through that line - at least that won't be going into your intake). But on the other side, you should hook up vacuum through a catch can. This will actively draw negative pressure on the crankcase and keep fresh air coming in through the breathers to replace it. If you were to vent the catch can to air and cap off the vacuum, the catch can won't really do anything (you might as well be venting both sides to air as above).

SPOHN · 06-22-2013, 03:00 PM

After discussions with Sam at GTM there is absolutely nothing wrong with putting filters on the intake side and leaving the others side completely vented to atmosphere and using no catch can at all. That's my plan. Maybe put filters on them so nothing can go in the holes.

SPOHN · 06-22-2013, 03:24 PM

This is how I work

Subframe Dropped

OEM Bushings removed. Real PITA

New SPL Bushings in the freezer to be installed tomorrow

SPOHN · 06-22-2013, 03:27 PM

Brief Pics of windsplitter in progress

wstar · 06-23-2013, 12:22 AM

Quote:

Originally Posted by SPOHN

After discussions with Sam at GTM there is absolutely nothing wrong with putting filters on the intake side and leaving the others side completely vented to atmosphere and using no catch can at all. That's my plan. Maybe put filters on them so nothing can go in the holes.

Yeah I guess so long as that other side still has PCV valves on them, they should only flow outwards.

Mr&Mrs · 06-23-2013, 01:25 AM

Man you are going all out with this, I love it. My favorite track Z by far! Keep it up. If I were to ever be able to do it this is how I would want to.

sixpax · 06-23-2013, 04:31 AM

Quote:

Originally Posted by SPOHN

Brief Pics of windsplitter in progress

Looks great SPOHN ... is the windsplitter a modified APR Universal Kit ?

SPOHN · 06-23-2013, 06:49 AM

Quote:

Originally Posted by sixpax

Looks great SPOHN ... is the windsplitter a modified APR Universal Kit ?

It's a material called Alumilite. Very strong, durable, and lite weight. Can be pi Jed up at most sign shops. I got a 4x8 sheet for $120. A lot of race teams use this material.

SPOHN · 06-23-2013, 01:57 PM

New SPL Solid Subframe Bushing and Diff Bushing

I didn't get pics of the shims. But the kit comes with several shims. Four of which must be used the keep the upper portion of the subframe at OEM height.

06-21-2013, 11:15 PM	#541 (permalink)
Sh0velMan A True Z Fanatic Join Date: Jan 2012 Location: Dallas/Ft.Worth Posts: 3,349 Drives: Noisily. Rep Power: 20	That PCV setup will make you run lean if you are still plumbing the output into the intake plenum. __________________ Buy My Car! \| Build Thread

06-22-2013, 07:16 AM	#544 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 45 Posts: 14,844 Drives: Waiting on next Z Rep Power: 221	As far as the PCV system goes I have filters on the intake side. Then I will be running a oil catch can vented to atmosphere while the manifold will be capped off. These are just some progress pics. Trust me, I know what I'm doing. Lol. I might not run a OCC. just let it vent as is directly from the Check valve. __________________

06-22-2013, 02:23 PM	#547 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3594	Well, if he were to vent both sides of the PCV system straight to atmosphere (through filters) and not use vacuum, it would probably work. I think the only downside there is that it's only the blowby pressure that will occasionally force a small amount of air out the breather side and/or PCV valves (whichever is least resistant). Thus pressure will be somewhat regulated and sane. But you won't really clean the ugly vapors out of the crankcase much either with no real flow or air exchange. Running breathers on the intake side as pictured is fine, IMHO. It's really not much functional difference from the stock configuration where the intake air filters play the role of that breather (and as a bonus - sometimes there is flow reversal and/or backfire through that line - at least that won't be going into your intake). But on the other side, you should hook up vacuum through a catch can. This will actively draw negative pressure on the crankcase and keep fresh air coming in through the breathers to replace it. If you were to vent the catch can to air and cap off the vacuum, the catch can won't really do anything (you might as well be venting both sides to air as above). __________________ 7AT Track Car! Journal thread / Car setup details Last edited by wstar; 06-22-2013 at 02:26 PM.

06-22-2013, 03:00 PM	#548 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 45 Posts: 14,844 Drives: Waiting on next Z Rep Power: 221	After discussions with Sam at GTM there is absolutely nothing wrong with putting filters on the intake side and leaving the others side completely vented to atmosphere and using no catch can at all. That's my plan. Maybe put filters on them so nothing can go in the holes. __________________

06-22-2013, 03:24 PM	#549 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 45 Posts: 14,844 Drives: Waiting on next Z Rep Power: 221	This is how I work Subframe Dropped OEM Bushings removed. Real PITA New SPL Bushings in the freezer to be installed tomorrow __________________

06-22-2013, 03:27 PM	#550 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 45 Posts: 14,844 Drives: Waiting on next Z Rep Power: 221	Brief Pics of windsplitter in progress __________________

06-23-2013, 01:25 AM	#552 (permalink)
Mr&Mrs A True Z Fanatic Join Date: May 2010 Location: Tampa Posts: 4,195 Drives: RZ34 Rep Power: 25229	Man you are going all out with this, I love it. My favorite track Z by far! Keep it up. If I were to ever be able to do it this is how I would want to. __________________ Project Z <--Click - Check out the link too many mods to list!

06-23-2013, 01:57 PM	#555 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 45 Posts: 14,844 Drives: Waiting on next Z Rep Power: 221	New SPL Solid Subframe Bushing and Diff Bushing I didn't get pics of the shims. But the kit comes with several shims. Four of which must be used the keep the upper portion of the subframe at OEM height. __________________

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