Derek Posted April 10, 2016 Share Posted April 10, 2016 It my be BSPT but some of the pitches are close. Quote Link to comment Share on other sites More sharing options...
luseboy Posted April 18, 2016 Author Share Posted April 18, 2016 Alright so I'm still trying to figure out what to do with the valve cover breather. I know this isn't rocket science but this is one of the few things I have left to do on my car and I'm kinda itching to figure it out. Quote Link to comment Share on other sites More sharing options...
Derek Posted April 18, 2016 Share Posted April 18, 2016 If you don't have a lot of blow-by then you may be able to have a breather element on the valve cover. But then you only have half of the system hooked up. The only time you will be evacuating the crank case is when there is vacuum present at the PCV valve. During no/low vacuum high RPM there will be no assisted evacuation. This is how I have mine setup and so far it seems to be enough. The blow by has a place to go and that is through the filter on the valve cover. If there is a lot of oil mist in your blow by then the filter will become soaked and start dripping. If I had an air box as opposed to velocity stacks I would probably consider plumbing it there. Quote Link to comment Share on other sites More sharing options...
luseboy Posted April 18, 2016 Author Share Posted April 18, 2016 If you don't have a lot of blow-by then you may be able to have a breather element on the valve cover. But then you only have half of the system hooked up. The only time you will be evacuating the crank case is when there is vacuum present at the PCV valve. During no/low vacuum high RPM there will be no assisted evacuation. This is how I have mine setup and so far it seems to be enough. The blow by has a place to go and that is through the filter on the valve cover. If there is a lot of oil mist in your blow by then the filter will become soaked and start dripping. If I had an air box as opposed to velocity stacks I would probably consider plumbing it there. See I don't actually know how much blow by I'm getting, I'm assuming it's got a fair amount as I think the rings are still original from 1981-1983. With the engine running I have not noticed any smoke or anything like that coming from either pcv breather (both are currently open but the engine is only being run for a minute or so at a time every week or so), with one exception. I had a dieseling problem recently and a puff of smoke came out of the crank crase breather when it was dieseling. I'm assuming this is to be expected, but at any rate I'm starting to plan out a blow through turbo set up that I'll be piecing together in a few years. Before I turbo the car the engine will come back out and I'll do a more thorough rebuild on it (rings, timing set, bearings). So at this rate I guess I'll just set up a simple pcv set up since I'm gonna be changing it in a few years anyways. If I just plumb the valve cover breather to my carb hat is that just gonna work the best for the time being? If the carb gets all oily I'll be pulling it all apart before turbo too so no big deal. Quote Link to comment Share on other sites More sharing options...
Tony D Posted April 19, 2016 Share Posted April 19, 2016 (edited) quit overthinking it and just do it == it's interim by your own statements so what difference does it make? I don't know how much clearer this can be other than the three times it's been stated already. Edited April 19, 2016 by Tony D Quote Link to comment Share on other sites More sharing options...
luseboy Posted April 19, 2016 Author Share Posted April 19, 2016 quit overthinking it and just do it == it's interim by your own statements so what difference does it make? I don't know how much clearer this can be other than the three times it's been stated already. You're totally right. This is my first time building a car so I still have much to learn even if I'm at the final stages. Over thinking can definitely cause problems. Thank you for your input. Quote Link to comment Share on other sites More sharing options...
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