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Discussion Starter #1
Which type would be correct to use? I want to adapt my valve covers so I can install the AN hose off my Vacuum Pump on them. Would I just use a Regular Bulk Head Fitting or maybe a Vented Fitting? Not sure if I am keeping the Control Relief Valve on the Vacuum Pump or install it on the Valve Cover.

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What type of valvecover? Mine are cast aluminum, so I just drilled a hole and tapped it with a 3/8npt tap and screwed a -10x3/8 fitting into it.
 

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Which type would be correct to use? I want to adapt my valve covers so I can install the AN hose off my Vacuum Pump on them. Would I just use a Regular Bulk Head Fitting or maybe a Vented Fitting? Not sure if I am keeping the Control Relief Valve on the Vacuum Pump or install it on the Valve Cover.

Thanks
Any AN fitting is ok but it should have a baffle. Star Machine has one with the baffle you just need to drill a hole in your valve cover. Don't forget if you are using the valve covers in the pictures you need to fill the existing hole.
 

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Discussion Starter #13
My Ford Racing valve covers already have a Baffel that screws on. Do I still need a Baffel An fitting too?
 

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My Ford Racing valve covers already have a Baffel that screws on. Do I still need a Baffel An fitting too?
No/Maybe/Yes....I had those same valve covers originally and I think the problem you're gonna run into, is finding a fittings short enough on the inside to still screw the baffle on.
 

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Discussion Starter #15
Well if that becomes a problem, then I would just use the baffeled fitting with out the valve cover baffel installed then. Right?
 

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Discussion Starter #16 (Edited)
So what size AN fitting is needed to fit my holes on my valve covers? Not sure what size opening the holes are, but I guess they are 1 1/4"? Does that sound right? Do I need to get the -10An,-12AN, or the -16AN to fit into the existing holes on the valve covers? Or do I just drill a new hole on the side towards the front on the valve cover and add the Baffled fitting? What is Best and Works? How about posting some pics to better understand?

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A AN fitting bolted directly into the top of your valve cover with no baffle is probably going to draw too much oil. You need to have a good baffle or some kind of breather with a baffle. A standard breather hole is about 1.2" and would require at least a -16, which will cause plumbing nightmares. Those giant fittings are expensive!
 

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Discussion Starter #18
So my Best bet is to drill new hole or holes for the -10an or -12an fittings on top of valve covers or maybe on the front sides? Then plug up existing holes on top with a Oil Fill on both? Sorry for all the questions, just want to make sure I purchase the correct parts Once.

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This is how we did the Monte Carlo. -12 on both covers to a catch can. Barely any oil in the catch can after 4 passes and a 15 mile drive.

 

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With those valve covers there are screw bosses on both ends so you can screw the baffles to the other ends. Then I drilled the hole for the AN fitting and had it welded on. Works great!

 
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