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CB Performance breather box
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aeromech
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PostPosted: Fri Oct 23, 2009 8:11 pm    Post subject: Reply with quote

Glenn,
I need to go somewhere tomorrow and have some fuel lines made to run from the hard fuel manifold I fabricated to the carbs. The fittings are 1/4 MS (or swagelock) male to 1/4 male AN and need to be about a foot long each. Where's a good place to go to have them made? Maybe stainless braid hose.
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Glenn Premium Member
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PostPosted: Fri Oct 23, 2009 8:15 pm    Post subject: Reply with quote

Honestly I didn't use any fittings... just band style hose clamps.

After all, it's just 3psi in the fuel line.

The ones I used are ABA band clamps on the right.
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aeromech
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PostPosted: Fri Oct 23, 2009 8:18 pm    Post subject: Reply with quote

Those clamps are cool. I found them on eBay yesterday for around $1 a piece delivered. My problem is that the fittings on the carbs are 3/8 AN male so I have to adapt to that.
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PostPosted: Fri Oct 23, 2009 8:21 pm    Post subject: Reply with quote

Form my IDA's I used Weber 45DCOE barbed fittings, so putting the hose on was easy. I also used the 7mm FI hose instead of the 5.5mm carb hose.
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aeromech
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PostPosted: Fri Oct 23, 2009 8:27 pm    Post subject: Reply with quote

Glenn wrote:
Form my IDA's I used Weber 45DCOE barbed fittings, so putting the hose on was easy. I also used the 7mm FI hose instead of the 5.5mm carb hose.


Thanks for the info Glenn.
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Chris Vellat
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PostPosted: Sun Oct 25, 2009 12:06 pm    Post subject: Reply with quote

Chris Vellat wrote:
aeromech wrote:
Type 5 Joe wrote:
The carb sucks all the oil through the #3-4 cylinders. Effectively lowering the octane rating of those cylinders.

Maybe he could inject oil directly into the other cylinders to lower the octane ratings there also, and even things up.


The oil lowers the octane rating? Octane is a measure of the resistance of fuel to detonation, not how much heat value it contains.


I thought it was clear what he meant...of course it'll 'increase' the octane - but with negative consequences...


I'm going to go back here and eat my words... Oil will decrease the octane by increasing the cetane...Oils are rated in cetane - or essentially the opposite of octane. Octane being the resistance, cetane being the willingness to detonate.
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aeromech
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PostPosted: Sun Oct 25, 2009 2:50 pm    Post subject: Reply with quote

Chris Vellat wrote:
Chris Vellat wrote:
aeromech wrote:
Type 5 Joe wrote:
The carb sucks all the oil through the #3-4 cylinders. Effectively lowering the octane rating of those cylinders.

Maybe he could inject oil directly into the other cylinders to lower the octane ratings there also, and even things up.


The oil lowers the octane rating? Octane is a measure of the resistance of fuel to detonation, not how much heat value it contains.


I thought it was clear what he meant...of course it'll 'increase' the octane - but with negative consequences...


I'm going to go back here and eat my words... Oil will decrease the octane by increasing the cetane...Oils are rated in cetane - or essentially the opposite of octane. Octane being the resistance, cetane being the willingness to detonate.


Thanks, I didn't know that
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dmilla
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PostPosted: Sun Dec 20, 2009 12:09 pm    Post subject: Modified CB Performance Breather Box Reply with quote

Here's my two cents...

I took "Lost In Baja's" post one step further on my 2007cc. In addition to adding 2/3 of one stainless steel Scotch Brite Scowering Pad to help collet the oil vapors to prevent potential clogging of my K&N filter, I drilled & tapped another intake fitting to the lower end of the box. Now, the oil vapors enter the lower third of the box, the full oil collection benefit of the breather is realized, and the K&N Filter shouldn't wet-out. The new intake fitting is tapped high enough to prevent oil backflowing into the valve covers when filling the case with oil. Seal it all up with some high-temp silicone sealer on both sides of the face plate rubber gasket and the pedistal gasket, and it'll stay nice, dry, & clean.

Enjoy!

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bigheadted
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PostPosted: Sun Dec 20, 2009 12:38 pm    Post subject: Reply with quote

It would sure suck big time IF a chunk of those scrubbing pads fell into the engine. I would at least add a screen over the large hole leading into the engine or would the stock louvered part do the trick ??
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dmilla
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PostPosted: Sun Dec 20, 2009 1:05 pm    Post subject: Reply with quote

You're looking at 2/3 of one pad that has been stretched and puffed up. The pad is extremely tough and cutting 2/3 of it off was a bitch, so I'm confident it won't separate.
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Glenn Premium Member
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PostPosted: Sun Dec 20, 2009 1:11 pm    Post subject: Reply with quote

Nice looking engine.
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dmilla
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PostPosted: Sun Dec 20, 2009 1:32 pm    Post subject: Reply with quote

Thanks for the compliment Glenn. You helped me with the parts to rebuild my 019.
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lostinbaja
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PostPosted: Sun Dec 20, 2009 2:12 pm    Post subject: Reply with quote

bigheadted wrote:
It would sure suck big time IF a chunk of those scrubbing pads fell into the engine. I would at least add a screen over the large hole leading into the engine or would the stock louvered part do the trick ??

I had the same worries, that is why I went with copper scouring pad. I have a lot of miles on mine with no issues.
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Daddybus
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PostPosted: Sun Dec 20, 2009 4:29 pm    Post subject: Re: Modified CB Performance Breather Box Reply with quote

dmilla wrote:
Here's my two cents...

I took "Lost In Baja's" post one step further on my 2007cc. In addition to adding 2/3 of one stainless steel Scotch Brite Scowering Pad to help collet the oil vapors to prevent potential clogging of my K&N filter, I drilled & tapped another intake fitting to the lower end of the box. Now, the oil vapors enter the lower third of the box, the full oil collection benefit of the breather is realized, and the K&N Filter shouldn't wet-out. The new intake fitting is tapped high enough to prevent oil backflowing into the valve covers when filling the case with oil. Seal it all up with some high-temp silicone sealer on both sides of the face plate rubber gasket and the pedistal gasket, and it'll stay nice, dry, & clean.

Enjoy!

Image may have been reduced in size. Click image to view fullscreen.


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I added a fitting to the back like this guy. I used one of the bottom fittings for a return like to the fuel pump block off. I filled the box with layers of steel screen material to help slow down the oil mist and help it to condense and fall back into the box/motor.
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pharos
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PostPosted: Fri Aug 20, 2010 7:17 am    Post subject: Re: Modified CB Performance Breather Box Reply with quote

dmilla wrote:
Here's my two cents...

I took "Lost In Baja's" post one step further on my 2007cc. In addition to adding 2/3 of one stainless steel Scotch Brite Scowering Pad to help collet the oil vapors to prevent potential clogging of my K&N filter, I drilled & tapped another intake fitting to the lower end of the box. Now, the oil vapors enter the lower third of the box, the full oil collection benefit of the breather is realized, and the K&N Filter shouldn't wet-out. The new intake fitting is tapped high enough to prevent oil backflowing into the valve covers when filling the case with oil. Seal it all up with some high-temp silicone sealer on both sides of the face plate rubber gasket and the pedistal gasket, and it'll stay nice, dry, & clean.

Enjoy!


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I have one question
Quote:
another intake fitting to the lower end of the box


Is this new intake fitting goes to both sides of valve covers with "T" Connector?

Tks
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wildman1
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PostPosted: Fri Aug 20, 2010 8:01 am    Post subject: Reply with quote

Pharos, good question. You could/should have another fitting for the other valve cover as T-ing the covers may not work properly?? I do not know, just speculating. It could just transfer oil from one to the other without a scavange of vapors to the breather?



dmillaFirst, your Bug is still my favorite late model street build and I hope mine will be that clean when done. Second, You can further utilize that breather box by plumbing the dead top fitting to your RH side Dell. You have the right idea for the VC at the lower 1/3 and the K&N to the atmosphere, it just needs vaccum that the carb will provide. Without the vacuum it will be a collector of vapors since the K&N will only bleed off a bit and not evacuate. Nice work. Wink
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Steve Arndt
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PostPosted: Fri Aug 20, 2010 6:03 pm    Post subject: Reply with quote

I TIG welded my CB breather box directly to the alternator stand. No leaks Smile I also enlarged the tapped holes to 3/8 instead of 1/4 pipe. I stuffed three copper cleaning pads inside. Finally, gloss black powder coated the whole shabang.
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aeromech
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PostPosted: Fri Aug 20, 2010 8:57 pm    Post subject: Reply with quote

Steve Arndt wrote:
I TIG welded my CB breather box directly to the alternator stand. No leaks Smile I also enlarged the tapped holes to 3/8 instead of 1/4 pipe. I stuffed three copper cleaning pads inside. Finally, gloss black powder coated the whole shabang.


Pics or it didn't happen......
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PostPosted: Sat Aug 21, 2010 12:39 pm    Post subject: Reply with quote

aeromech wrote:
Steve Arndt wrote:
I TIG welded my CB breather box directly to the alternator stand. No leaks Smile I also enlarged the tapped holes to 3/8 instead of 1/4 pipe. I stuffed three copper cleaning pads inside. Finally, gloss black powder coated the whole shabang.


Pics or it didn't happen......


Just uploaded one:


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The bottom is plumbed to the fuel pump block off with 3/8 fittings.
The top fittings are still 1/4 pipe. This is working on my 13.1:1 2275.
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PostPosted: Sat Aug 21, 2010 3:34 pm    Post subject: Reply with quote

I have one for sale if anyone is interested-PM me.
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