I really like the fabricated valve covers like these but they have no breathers. I know I need at least one. How hard is it to install some sort of vent and where can I get a "baffle kit" or something? I really like the clean look and would prefer not to have a BIG breather on top of the cover. Any suggestions? http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ih=016&sspagename=STRK%3AMEWA%3AIT&viewitem=&item=260156212100&rd=1

Drilling a 3/4~1 1/4" hole(s) for PCV and Vent installations is common to use these covers on most engines.
You can locate the items where-ever you need in most cases as long as they clear the internal valve train parts.
Comp. Cams sells a vent/baffle set that uses K&N breathers. Summit ( http://store.summitracing.com/egnsearch.asp?N=700+400114+115+4294888301 ) and most other speed shops carry them and the right K&N breathers.

There are also grommets and oil-fill plugs available from most auot parts stores to adapt PCV and other needs.

If I was planning on buying these I would contact the seller and see what they recommended for warranty reasons.

Can you buy that style for SBC's???

If I was planning on buying these I would contact the seller and see what they recommended for warranty reasons.
Warranty for what reasons, like warpage?

YUP, right here: http://cgi.ebay.com/ebaymotors/SMALL-BLOCK-CHEVY-FAB-ALUMINUM-VALVE-COVERS_W0QQitemZ200147962972QQihZ010QQcategoryZ336 27QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Can you buy that style for SBC's???
YUP, right here: http://cgi.ebay.com/ebaymotors/SMALL-BLOCK-CHEVY-FAB-ALUMINUM-VALVE-COVERS_W0QQitemZ200147962972QQihZ010QQcategoryZ336 27QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

I had to drill my Brodix covers. It ain't scary:)



Remember Breather on pass side, pcv on drivers side. On the theory that rotation is trying to heave oil back up on pass side, so you don't want it getting sucked into pcv.

pcv and breather cati-cornered and opposite sides, for flow.


The reason they don't come pre-drilled is cuz of the different styles of crankcase venting in use. Not evrybody wants holes in the top.

What I'm going to do with mine is weld an AN fitting in each valve cover, and run a line from each valve cover into a breather tank. I'm not a fan of breathers, especially with a blown motor. Here's a pic (picture another line running to the can from the opposite cover):

http://i66.photobucket.com/albums/h276/AlsRide/catchcan.jpg

What I'm going to do with mine is weld an AN fitting in each valve cover, and run a line from each valve cover into a breather tank.

That won't give you crankcase ventilation - just pressure relief. :)

I'm not sure I follow, there's a standard breather on the breather tank?

I'm not sure I follow, there's a standard breather on the breather tank?
John's correct, you have nothing creating circulation... Compare a breather in each valve cover (or each plumbed to a single breather) to a PCV system where vacuum pulls air through the crankcase.

I probably should have stayed out and mentioned I'm doing this for a blow-through engine. There are a LOT of guys doing this at www.turbomustangs.com.

Hi guys,
I have my valve covers with the PVC on the passenger side and breather on the driver side. Is that a big n0-no, and will it suck oil into the carb/intake? Would that contribute to my poor bottom end and 60 ft times?
By the way, I have gotten a lot of recommendations here about improving my low end torque. I called Comp Cams helpline yesterday, and the guy told me what everyone else has already said, lose the Vic Jr and go with the RPM Air Gap, He also said my Quick Fuel drag 750 with mechanical secondaries was compounding the manifold issue, and told me to go with a 650 vacuum secondary Holley on the air gap. That make sense to all you guys? He also said I could pick up some torque by advancing my cam another four degrees, in addition to the 4* built into the Comp Cam. Any opinions?
Thanks as always guys.
rj

By the way, I have my PVC and my brake booster T'd into the back of the carb vacuum port. Is that a bad idea the way I have it plumbed?
thanks again
rj

RJ, it may or may not cause oil into the intake. Some of that will depend on if you have a baffle under your PCV.

I would disconnect and plug the vac line to the PCV at the track. Plug it back after.

Normally PCV and brake booster are seperate source but I've seen them common.

You want a mec sec carb for performance. I agree 750 may be too much, but it can be made to work on a 350. Depends on how good are your heads as to whether you actually NEED a 750.

Not a good idea to plumb the booster common with the PCV - you don't want oil vapors to work their way into the booster. That's why you never see them done that way on an OEM design.

:beers: