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Tech Advice needed: Modifying Valve Cover with -12AN fittings, does this look right?

 
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Old 05-16-2010, 12:56 AM
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Tech Advice needed: Modifying Valve Cover with -12AN fittings, does this look right?

Hello everyone,

It's been a while since I've been on here it seems, or at least looked around and commented/posted much.

Recently, my dad and I have been having a debate on this new breather system that I want put on my engine. But first, some background...

As most of you know, the car has the Jackson Racing supercharger on it. This is currently how the PCV valve and regular breather valve look on the valve cover:



If you can follow along, this is what the PCV tube is doing: It is running into a T-fitting that goes somewhere to before or after the throttle body (don't really know for sure, I'm not home to look at it). The breather valve is simply a long rubber hose that goes down to an area pointing directly at the ground where it can just blow into the open elements. Environmentally friendly? No. But not blowing hot gases/oil into the intake? Yes.

Before I deployed, I had my old Rising Sun valve cover fitted with two -12AN bungs welded into the front of it. The old location for the PCV valve was welded shut and the same goes for the breather valve location. Here is a quick glimpse of the ongoing project while everything is being "shaved" and before it gets powdercoated.




The reason I am having this done is because while on the dyno in 2008, at high RPM, the oil dipstick would blow out of the oil tube. The general concensus was that there was too much pressure in the crankcase due to the engine being F/I now and not having enough/large enough openings to let the crankcase pressure escape. The dipstick blowing out could've been a much worse scenario if maybe the pressure had started to try and go through the piston rings, not a good thing! The goal with these two -12AN fittings is to run in these Earl's black braided lines I have to a Moroso Crankcase breather apparatus I have that is enormous. The pressure will be vented through a large top-mounted filter.

So we've all seen others run these AN fittings on others' valve covers before, but my question to anyone with knowledge of these things out there:

Do you need to have a PCV valve after you F/I a previously N/A car?


I argue that you do not have to, and that all lines on the JRSC that were being fed off of this PCV hose should just be sealed off (black rubber nipple covers come to mind).

My dad argues that he should tap the valve cover and put in a brass fitting that could potentially be used to fit a future PCV valve if we find out we need one. He wants to do it before the valve cover is powdercoated so that we wouldn't have to try and drill thru the powdercoating later on.

My problem with that is that if I'll never need a PCV valve again, adding a brass fitting somewhere on the valve cover is going to look ugly and be unneccessary on the theme I'm trying to go with on this shaved valve cover.

Thanks for any advice or previous knowledge in this matter.
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Old 05-16-2010, 06:11 PM
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