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Old 02-04-2011, 02:41 PM
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circle track valve cover

getting bored w/ my VC.

found a fabricated circle track VC i like; sorry no pic of this one.

one vc has two 1 1/2 pipes; other is bare.

i suspect i should cut hole in bare cover so pcv is on opposite bank than the two breathers.

think it would be pretty bad to leave one VC blank, run breather atop one pipe and pcv atop other pipe?

how is a real circle track car pcv system set up?

pretty stupid idea i guess.
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Old 02-04-2011, 08:38 PM
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Circle track guys don't have PCV's. It pollutes the incoming air charge and we don't car about the EPA either.

The VC with the breather tubes on on the left side and have baffles of some sort to keep the oil mist from escaping. If you make one on the right side VC, you will need to make something. You might see some with spring oilers too. You don't really need these in a street application.

http://www.speedwaymotors.com/Small-...teel,1883.html

http://www.speedwaymotors.com/Speedw...hers,1878.html

Using these two things works pretty well.

Just the bare steel covers work well to and allow you to put the breather in with any size and style you like. Beware the raw steel ones can rust on the inside if you have moisture issues from cool temps. I just etch and paint the insides and it works well for me.
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Old 02-04-2011, 09:59 PM
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Thanks.
I like the pipes to keep oil mist far from filter.
I am looking at fabricated Al w/ 1/4" billet rail and 2 pipes already made up.
I am looking at the non circle track version also.
My favorite would be one pipe per cover; I don't have a tig.
I'll sleep on it.

So I guess the racers install both breathers on drivers side because the left hand turning slings oil toward passenger side?
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Old 02-04-2011, 10:33 PM
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Quote:
Originally Posted by 001mustang

So I guess the racers install both breathers on drivers side because the left hand turning slings oil toward passenger side?
You are exactly correct.

You could do what I've done. Buy the covers with a single prefabbed hole in each, then machine a couple pieces of aluminum or stainless tube to a press-fit into the prefabbed holes. The holes are 1.22" on diameter, and have an 1/8" rolled lip flange, so 1.25" tubing needs just a minor trip through the lathe on one end to size it for a .005-.006" press fit. Press them in with a little red loctite, support the inside of the cover when your pressing. Works great! Allows you to make the pipe as short or as tall as you want it.

If you wanted a PVC grommet size hole at the top of one pipe you could just machine a ring to press into the pipe, to fit the grommet lip. Or machine a grommet lip onto the pipe if you are ising a thicker wall tube.

I used 1.25" x .060" wall stainless tube pirated from a scrap bin at work.

Last edited by ericnova72; 02-04-2011 at 10:43 PM.
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Old 02-04-2011, 10:55 PM
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Quote:
Originally Posted by ericnova72
You are exactly correct.

You could do what I've done. Buy the covers with a single prefabbed hole in each, then machine a couple pieces of aluminum or stainless tube to a press-fit into the prefabbed holes. The holes are 1.22" on diameter, and have an 1/8" rolled lip flange, so 1.25" tubing needs just a minor trip through the lathe on one end to size it for a .005-.006" press fit. Press them in with a little red loctite, support the inside of the cover when your pressing. Works great! Allows you to make the pipe as short or as tall as you want it.

If you wanted a PVC grommet size hole at the top of one pipe you could just machine a ring to press into the pipe, to fit the grommet lip. Or machine a grommet lip onto the pipe if you are ising a thicker wall tube.

I used 1.25" x .060" wall stainless tube pirated from a scrap bin at work.
Sound good.
Think I'll get single hole covers; maybe rig some pipes later.
No lath here but maybe a shop would weld some pipes from the inside for
cheap. Unless they were confident enough to make a pretty weld on the outside. Machine shops don't seem to come cheap.
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Old 02-05-2011, 12:09 PM
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you can buy those same covers with no holes. Moroso sell a kit with al tubes and breathers to weld in. KN sells a bolt in breather tube that works well.
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Old 02-05-2011, 12:33 PM
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I can find the VC I like and some Al pipe.
Have experience w/ mig welding and tourch brazing on steel.
Never ventured to weld Al.
Hate to ruin a new fabricated cover.
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Old 02-05-2011, 07:08 PM
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The only way you are going to do this with welding and do it cleanly is TIG welding. It is the only choice if you choose to weld.
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Old 02-05-2011, 07:53 PM
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no welding bolt on

http://www.speedwaymotors.com/Race-E...irst_answer=17
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