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> Crankcase breather with carbs., How do you attach a hose to the filters?
Thack
post Nov 11 2007, 11:32 PM
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For those running dual carbs, how do you attach a crankcase breather hose to the filters? Especially if you have K&Ns, which I plan to replace. Do you run two hoses? Got pics? (IMG:style_emoticons/default/sawzall-smiley.gif)
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So.Cal.914
post Nov 11 2007, 11:59 PM
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QUOTE(Thack @ Nov 11 2007, 09:32 PM) *

For those running dual carbs, how do you attach a crankcase breather hose to the filters? Especially if you have K&Ns, which I plan to replace. Do you run two hoses? Got pics? (IMG:style_emoticons/default/sawzall-smiley.gif)


My K&N's had KO's on the bottom, knock them out and put in nipples.

I have seen some useing one hose to one filter with a 'Y' to bring in both sides

and tieing the oil filler breather into one of those. I didn't like that idea.
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pete914
post Mar 4 2008, 06:32 AM
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hijacking the thread here...pics anyone?
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SGB
post Mar 4 2008, 07:06 AM
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I wouldliketo see this too. I don't think I have any knock out plugs under there...
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Joe Ricard
post Mar 4 2008, 07:44 AM
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It's easy.

YOU DON'T.

Get a CB or EMPI breather box or for a real breather system one from JEGS or SUMMIT Puke can.
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pete914
post Mar 4 2008, 08:58 AM
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so just run a tube from the oil filler to the breather box and then two tubes from there into the air cleaners and you're set?

QUOTE(Joe Ricard @ Mar 4 2008, 08:44 AM) *

It's easy.

YOU DON'T.

Get a CB or EMPI breather box or for a real breather system one from JEGS or SUMMIT Puke can.
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Joe Ricard
post Mar 4 2008, 09:15 AM
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Why?

All you are doing is sucking oil into the carbs. real good way to clogg them up with gunky oil film.
Run the valve cover vents to the box and the oil filler PCV to the box and let the box breath through the cover as desiged.
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rhodyguy
post Mar 4 2008, 09:20 AM
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or...with 2.0 heads with the drain/vapor return tubes, you run a single vent line from the oil fill tower to the cb style foam filled box and lines from the outlets on the box to the heads. you need to ensure the bb is mounted high enough for the oil to flow to the heads and not puddle in the lines. with the cb bb, squeezing the dirty oil out of the foam filter and soaking up the small ammount in the bottom should be considered part of routine maintenance.

k
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pete914
post Mar 4 2008, 10:56 AM
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Do I need the valve covers to be vented? Right now they aren't. Would the oil filler PCV valve into the box be sufficient? Might just run a tube from the box to the underside of the car. Hate to put more fumes in the air though...as if dual webers aren't bad enough...


QUOTE(Joe Ricard @ Mar 4 2008, 10:15 AM) *

Why?

All you are doing is sucking oil into the carbs. real good way to clogg them up with gunky oil film.
Run the valve cover vents to the box and the oil filler PCV to the box and let the box breath through the cover as desiged.
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rhodyguy
post Mar 4 2008, 11:34 AM
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just venting to the underside of the car is not the way to go, imho. the tubes i mentioned return to the valve cover area, so venting to the valve covers is a better idea. drill a couple of holes in the engine tin and run the lines thru grommets.
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Joe Ricard
post Mar 4 2008, 11:39 AM
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Word. DO NOT vent it under the car. You will end up draining the entire sump Via vapor and depositing it on the under side of your motor.
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SirAndy
post Mar 4 2008, 11:57 AM
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QUOTE(Joe Ricard @ Mar 4 2008, 09:39 AM) *

Word. DO NOT vent it under the car. You will end up draining the entire sump Via vapor and depositing it on the under side of your motor.


(IMG:style_emoticons/default/agree.gif) the vent needs to be higher than the motor ...

(IMG:style_emoticons/default/shades.gif) Andy

PS: here's a pic of my CB setup i had on the old 2056 ...
the head-vents actually suck in air at higher rpms, so any oil that puddles up in the breather box just runs back into the heads ...


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akellym
post Mar 4 2008, 11:59 AM
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this works very well for me.

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pete914
post Mar 4 2008, 03:14 PM
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sirandy,
so you have one line from oil filler to puke box...two lines from puke box to each valve cover? what kind of fastener grommets are you guys using? it would be so, so, so bad if that came loose in there. further, must have to be a tight fit to keep the dirt out...
thanks for your help. just want to do this right the first time...

by the way...very nice looking engine bay akellym
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SirAndy
post Mar 4 2008, 04:05 PM
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QUOTE(pete914 @ Mar 4 2008, 01:14 PM) *

sirandy,
so you have one line from oil filler to puke box...two lines from puke box to each valve cover? what kind of fastener grommets are you guys using? it would be so, so, so bad if that came loose in there. further, must have to be a tight fit to keep the dirt out...


almost ... oil filler to puke box ... stock head vents to puke box ...

no need to mess with the valve covers if you have heads that have the stock vent setup. i forget which years had the head vents
(IMG:style_emoticons/default/shades.gif) Andy

green arrow points to the vent hole. it has a insert that you simply clamp the hose to ...



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orange914
post Mar 4 2008, 04:26 PM
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heres a picture with nipple. anyone got a puke can they want to sell or trade out of?
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pete914
post Mar 4 2008, 05:51 PM
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anyone know the stock years they had the vents? I'm running a '74 1.8L
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chris914
post Mar 4 2008, 06:52 PM
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Does anyone have pictures of how they added them to the valve covers? My 2 liter heads do not have the breather ports.
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So.Cal.914
post Mar 4 2008, 07:12 PM
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Now this is just me but I would rather drill the head and add a nipple then try to seal them to the valve cover. My .02
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sww914
post Mar 4 2008, 07:54 PM
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If my heads weren't already vented like the one in the picture, I would vent the valve covers. It's much easier to remove the valve covers than the heads. The way that I've done it before is to drill a hole in the valve cover in a similar location to the vent in the head and weld on a piece of steel tube with a 1/2"od at the same angle as the vent in the head.
If the heads are already off and they have a flat boss cast into them for the vent, I'd just drill it out, tap it, and screw in a piece of pipe. If I didn't have a tap, I'd JB weld a tube in there.
Let's git her done!
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