I have a boosted gsr making 350whp. When I boost through the gears oil blows out the breather on the catch can. The catch can has two nipples one hose runs to the valve cover and the other runs to the back of the block with the z10 fitting. The black box was removed and pluded and a large plug was removed from the back of the block with a nipple installed.

Why am I getting so much blow by? Is my catch can set up bad? Should I get the black box back and run a hose from that to the catch can?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boostedteg4dr &raquo;</TD></TR><TR><TD CLASS="quote"> Should I get the black box back and run a hose from that to the catch can? </TD></TR></TABLE>

yes, but try searching next time

 

The search isnt working for some reason. Does my set up always create alot of oil in catch can? Should I use the PCV Valve on the black box? If I put a check valve inline with the line coming from the back of the block without the black box and the setup I have now, would that work? Thanks for your help.

 

you need to baffle the catch can, and also run a return line to one of those ports on the back of the block mounted to the lowest point on the can. i had the same problem and doing that fixed it.

 

Thanks man. I was just thinking I was going to do it that way. What do you mean by baffle? It might already be baffled, how can I tell?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boostedteg4dr &raquo;</TD></TR><TR><TD CLASS="quote">What do you mean by baffle? It might already be baffled, how can I tell?</TD></TR></TABLE>

check the third picture:

http://cgi.ebay.com/ebaymotors...ZWDVW

basically it allows the vapor to come out but stops the oil from sloshing out, naturally the oil will still come out if the thing fills up but thats why you use a drain back, hope this clarifies it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blinx9900 &raquo;</TD></TR><TR><TD CLASS="quote">

check the third picture:

http://cgi.ebay.com/ebaymotors...ZWDVW

basically it allows the vapor to come out but stops the oil from sloshing out, naturally the oil will still come out if the thing fills up but thats why you use a drain back, hope this clarifies it.</TD></TR></TABLE>

Thats really not that bad looking at all either...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jDMJeRk &raquo;</TD></TR><TR><TD CLASS="quote">

Thats really not that bad looking at all either...</TD></TR></TABLE>

you're right.. almost makes me wanna bid on it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jDMJeRk &raquo;</TD></TR><TR><TD CLASS="quote">

Thats really not that bad looking at all either...</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Outkast95LS &raquo;</TD></TR><TR><TD CLASS="quote">

you're right.. almost makes me wanna bid on it </TD></TR></TABLE>

x3, ive had my eye on that thing for a while, but i already have a good setup i think its excellent for the price

 

jeeze... you wonder why it blows oil out eh ???


foward acceleration = oil in the engine getting slug to the rear most point.....

the oil obviously drains downward toward your hose location, and most important, the oil is supposed to be draining back into the oil pan. your setup is just pushing the oil right out of the engine !


couple that with less than optimal sized hoses, poor hose location and you are sure for a nice oilly engine bay.


get large diameter hoses, put them on the FRONT and TOP of the engine (valve cover) the large hose will still be able to move the same or more amount of air, with less air speed, it will carry LESS oil with it.

 

thats the one I have. Im just going to run the line from the back of the block to the bottom of the catch can instead of the side.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DaveF &raquo;</TD></TR><TR><TD CLASS="quote">get large diameter hoses, put them on the FRONT and TOP of the engine (valve cover) the large hose will still be able to move the same or more amount of air, with less air speed, it will carry LESS oil with it.

</TD></TR></TABLE>
Just wondering if someone can clarify once and for all what needs to be done to the black box, if you decide to keep it and run two fittings from the front of the VC. I've searched, and read tons of threads, but everybody has a different opinion.

Here's what I have gathered as being correct for a B series:

- 2 lines from front of VC (10 or 12 AN) to a baffled catch can.
- Remove hose (that runs from black box to manifold) and has stock PCV valve in line. Disregard this hose & PCV valve.
- Run a new hose from black box to the catch can, and cap off the intake manifold port where the hose (w/ pcv valve) used to go.
- Now we have one small hose coming from black box to block. Should this be removed, and the fitting on the block be capped off, and run a new hose from the black box to the atmosphere?

 

Personally, i have that catch can posted above running 2 line of the back of the block.

I didnt have any problem with oil shooting out of the catch can, after about 10 run down the track there were a little bit of oil in it but nothing crazy.

Just make sure you mount the catch can HIGH and you shouldn't have a problem

 

That may work good for you. But is your car boosted and making 100hp per cylinder?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boostedteg4dr &raquo;</TD></TR><TR><TD CLASS="quote">thats the one I have. Im just going to run the line from the back of the block to the bottom of the catch can instead of the side. </TD></TR></TABLE>

is that goin to work?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boostedteg4dr &raquo;</TD></TR><TR><TD CLASS="quote">That may work good for you. But is your car boosted and making 100hp per cylinder?</TD></TR></TABLE>

Im making 400 HP on pump gas if it matter

Edit: I'm also running B18 81mm stock sleeve that was just hone before putting in new 81mm piston. So my piston to wall clearance is also a little looser than most, i may have more blow by then some

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boston_George &raquo;</TD></TR><TR><TD CLASS="quote">
Here's what I have gathered as being correct for a B series:

- 2 lines from front of VC (10 or 12 AN) to a baffled catch can.
- Remove hose (that runs from black box to manifold) and has stock PCV valve in line. Disregard this hose & PCV valve.
- Run a new hose from black box to the catch can, and cap off the intake manifold port where the hose (w/ pcv valve) used to go.
- Now we have one small hose coming from black box to block. Should this be removed, and the fitting on the block be capped off, and run a new hose from the black box to the atmosphere?</TD></TR></TABLE>


on our cars we plug the hole the black box attachs to (the big one on the bottom), and also plug the hole where the small nipple is.

if you were to keep the black box, leave the pcv valve in one hole, then the other hole can go to the bottom of your catch can (drain back) that is, if the line is below the bottom of the catch can. if its not, get rid of the black box, go to an auto parts store. pick up a .5 cent 34mm freeze plug, and a 1/4 npt(male) barbed fitting. install the fitting in the freeze plug, put loctite or something on the threads of the fitting, honda bond or RTV around the o.d. of the freeze plug, then run a hose from that to the bottom of your catch can. (drain back)


Modified by DaveF at 5:32 PM 5/12/2008

 

Thanks DaveF for the info.