Pro Stock John

iTrader: (34)

I've got ARE stage III heads, a 242/242//114 LSA cam, and currently run a pcv in the back of the driver's side head going into a small KN breather, the passenge side rear outlet is capped, and the front is piped into a fuel type filter and then the intake.

I am NOT going to do a 4-6-8 Caddy pump evac system, it's too noisy per my buddy zbass28@aol.com, he said I WOULD hear it over the exhaust.

I am thinking catchcan, but what would I do, have a hose go from the catch can back into the intake? I need some air going in there right? Or would you cap both the TB inlet AND the intake inlet?

Pro Stock John

iTrader: (34)

Oh, and I do have the LS6 pcv system on my car, and it's not enuff. I bought the LS6 style CAP for the driver's rear part of valve cover and blew it out first time I went WOT, I clearly have too much blowby for it... nitrous ring gap?

mjf454

How about a K&N breather in each valve cover, instead of a pcv system? Moroso makes a setup that has hoses from the breather to a check valve welded into the headers for crankcase evacuation. <img border="0" alt="[Burnout]" title="" src="graemlins/burnout.gif" /> My smallblock has a decent size solid roller {274 @ .50 with .638 lift} and is has been working good since 91.

<small>[ April 08, 2002, 06:21 PM: Message edited by: mjf454 ]</small>

Pro Stock John

iTrader: (34)

I had a KN breather in the back of the driver's side valve cover and oil slops out of it when I launch hard since the valve covers are so low. IMO it's a fire hazard, it will mist oil onto the header.

I could do a catchcan with a breather on top.

I just hate having that stupid haze of blue smoke after a dyno pull or a track run...

LS1derfull

PSJ header evac. system doesnt work with any backpressure from closed exhaust,im not too familiar with ls6 setup but, i would run stock tubes to the front(if you still can) and put a seperator in line between intake manifold port and pcv valve, i use 3/8" fuel filter, but seperator would be better.

LS1derfull

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by LS1derfull:
<strong>PSJ header evac. system doesnt work with any backpressure from closed exhaust,im not too familiar with ls6 setup but, i would run stock tubes to the front(if you still can) and put a seperator in line between intake manifold port and pcv valve, i use 3/8" fuel filter, but seperator would be better.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Also leave pass. side tube to throttle body stock,use a breather on dipstick tube or on your seperator mod.

felton316

This is the setup I had on my civic, before it was stolen. I just haven't had time to put it on the camaro yet.
<img src="http://home.houston.rr.com/bigtwink/images/Breather.jpg" alt="" />

It consists of a moroso oil catch can and breather filter. The filter was replaced with a Ford (yeah, I know ford <img border="0" title="" alt="[Mad]" src="gr_images/icons/mad.gif" /> ) PCV valve to keep it a closed atmoshpere system. Then a few barb ends and a little bit of hose, and its complete.

Here is where it was located on my civic:
<img src="http://home.houston.rr.com/bigtwink/images/intakeandcatchcan-circled.jpg" alt="" />

(not my actual car, but just like it)

I'm just trying to find a place in the cramped LS1 engine bay to mount it. <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />
Just throwing out an idea....

felton316

Sorry about the crappy pics. The ford pcv valve is the one from the Autozone Help! section for $2.00, I can't remember but I think the part # was 294. Also had to get the rubber pcv plug (also in the Help! section) it fits the hole where the little K&N sat, and allows the pcv valve to be mounted securly in the catch can.

<img src="http://moroso.com/catalog/images/85465_part.jpg" alt="" />
Part#: 85465

Remove the filter and install the pcv valve and grommet to keep it a closed system.

<small>[ April 09, 2002, 12:41 PM: Message edited by: felton316 ]</small>

Pro Stock John

iTrader: (34)

So you took the KN filter off the top, and put a Ford PCV on top. What are the other holes for?

CHRISPY

PSJ, I would hook the PCV back up like stock. Have the lines come from each valve cover, merge and go into the PCV fitting on the manifold. Reconnect the fresh air line from the top of the T-body.
If you are getting too much suction through the PCV valve install a restrictor inline till suction is adequate.
You are getting a vac leak with your current setup and not getting proper crankcase evac. This will have a negative affect on your RWHP output.
Cheers,
Chris

Fulton 1

iTrader: (9)

PSJ,
I've been running the GReddy catchcan for a while now with good results. Oil consumption is almost nil (although mine wasn't that bad to begin with) and the intake looks clear of oil residue. I just installed it inline upstream of the PCV. My SS doesn't have traction control so I just mounted it behind the battery with the sight glass visible. This way you still have a closed system and no restrictions like an inline fuel filter might create.

Here's a link showing the can. Also I'd be happy to email you some pics of my setup if you're interested (don't have a way to post them at this time).

www.roadraceengineering.com/instructions/greddycatchcan.htm

Also, here's a writeup of one installed on a C5:

www.2phast.com/Corvette/catchcan.htm

<small>[ April 09, 2002, 01:09 PM: Message edited by: Fulton 1 ]</small>

Pro Stock John

iTrader: (34)

I would rather run a catchcan than reinstall the factory pcv system.

We should not see significant oil usage with a filtered system.

Too bad the Evac setup on my buddy's car is so damn loud, I wanted to do that... He said it's louder than an electric fuel pump.

zombiedude

iTrader: (1)

Big cammed, I duno, but I did this on a lot of motors and it 'cut down the oil useage' through the PCV valve.
Author Topic: Oil use. Another PCV mod?
zombiedude
SLP Member
Member # 6512

posted 02-24-2002 11:27 PM
--------------------------------------------------------------------------------
I've been reading on the oil use thing since I have that problem. Seems to be the PCV in most cases. Well I think I came up with another mod. I took a crankcase breather element for a older chevy. Took out the element its self and took about 1/3rd of it and put it in the tube in front of the PCV valve. Not craming, but making it fit. Since that mod, NO oil use. Still looks like stock. Change when changing oil. That's about when it's saturated(sp) with oil. Only 1 oil change on record since mod but oil use is not happening now! HOPE THIS HELPS.

--------------------
35th SS LE vert M6 TBbypass mod/homemade!CAGS
83 GMC 1500 Fleetside Longbed 454/529hp 400 trany 410 gears

--------------------------------------------------------------------------------
From: Louisiana | Registered: Jan 2002 | IP: Logged


I also 'blew' to make sure of air flow. Hope this helps <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" /> Been working out fine.8000+ miles of hard driving. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

<small>[ April 09, 2002, 09:14 PM: Message edited by: zombiedude ]</small>

qqwqeqwrqwqtq

Who said the Vacuum pump was too loud? If he ran it on a bench, and it was new, than yes it's loud.

Once the pump pulls a vacuum (and breaks in for a few hours) it's relatively quiet. If I can't hear it over my exhaust than you certainly wouldn't hear it over your exhaust.

Also, I ran dual 3inch with mufflers and turndowns on my Chevelle, and the header evac worked kickass on that car (blower car remember).

I'm also confused as to why people are running fuel filters on there PCV systems. That will stop any dirt in the oil from getting sucked in the intake, but it certainly won't slow down any oil that's flowing through there. (It's designed to seperate dirt from fluid, not fluid from air) ????????????

Pro Stock John

iTrader: (34)

Hey there Jimmy good to see you, but there is something wrong with your sig it should say "waaaay behind PSJ" because I don't remember being slower than you... <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

If the evac / caddy pump setup is not that loud I'd like to give it a whirl, tell me what I need.

Pro Stock John

iTrader: (34)

I think not Chris.

With the stock setup I can see .5 to a full quart of usage from a day of racing... A PCV system in some respects is an intentional vacuum leak.

I do not like to burn oil it reduces octane.

CHRISPY

Buring half a quart in a day of racing is perfectly normal PSJ and is often not the result of the PCV at all.

Also the PCV systems in our cars are a closed system. That is why the fresh air line and the PCV lines are after the MAF into the intake tract and not vented to atmosphere. Introducing a vac leak anywhere post MAF will cause erratic AF readings and usually a lean spike at certain rpms.
The restrictor inline will reduce the amount of vacuum the PCV sees without causing AF swings from vac leaks. The restrictor will also reduce the amount of oil consumption on race day. you can also install a drainable catch can and setup the lines on the PCV to further minimize oil consumption through the PCV. You will still burn oil past the rings however. Especially with a wider ring gap for NO2.

Cheers,
Chris

<small>[ April 09, 2002, 12:36 PM: Message edited by: Chris ARE 360 ]</small>

felton316

One hose barb on the side is for the incoming line (hose before pcv). It enters the catch can where the baffleing seperates the oil and air. Then it goes out the top (Ford pcv valve) to where the original pcv hose connected to the TB or intake manifold (depending on the car). The drain **** on the bottom is to drain the oil that is seperated from the air. I used clear tubing to connect the can to the throttle body, so I could see the oil usage going into the motor. With the can installed the tube should remain pretty damn clear.

patSS/00

iTrader: (6)

I made a catch can out of 3" ABS plastic pipe (from hardware/plumbing store), and it fits nicely in the space by the radiator on the drivers side, with hose and aluminum tubing running from there under the TB to the PCV valve. The "can" has bronze fittings on top and a copper pipe running down inside so the air has to go down this pipe and then travel back up inside the can thru filtering material (currently, foam air cond. filter). The can also unscrews (you can get the pipe pieces with threads) to change filters and empty it out - what it mostly collects is water! Anyway, you can make one of these for about $25, and then try different kinds of filter material - just an empty can will not stop much oil.

Phil99TA

Correct me if I'm wrong but isn't the car still going to suffer from oil consumption even with a catchcan or filter? It may successfully block oil from getting into the intake but oil is still getting pooled up and you will still have to add oil just like before, no?