I do not agree.
The stock T1 breather box is superior to both boxes mentioned in this thread. Basic math will tell you why. It does not matter what size your engine is. The stock box is, on the other hand, not race legal.
Opening the valve covers will only allow the oil a new way of escaping and nothing else. The pressure is not created there and that is why you should not vent there. The oil will always follow the easist route and if the oil is not allowed back to the case where it belongs via the usual 4 escape routes (your pushrod tubes) it will escape via your breather tube. Not good.
I stopped venting the valve covers some years ago and I have not experienced any issues at all. But then again I do make sure I vent where it is needed and where the pressure is created. Take a close look at this Pauter engine case and note where it breaths:
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-BB-
Quote:
Originally Posted by effvee
Good morning, if you stay stock, your stock parts work fine. But if you go up in bore, stroke, and compression you are going to start seeing leaks; probably first around the crank. Not sure if you are talking type one, if you are, normally the type one does not have a crank seal.
For me getting the blow-by addressed from different locations aid in total size. That blow-by gasses can be hot, without the aluminum steel wool,, the hot oil vapors can get out causing a mess at wherever the blow-by container is located.
Why the valve covers, its just another place that can be tapped without drilling into your case.
My car, a 2332 type one, I had not added valve cover vents, just the stock location.
My car did leak from the crank, due to new cylinders, not yet mated rings, higher compression. If you choose venting to the carb (carbs), which one? Or are you going to "t" the two? Not venting will cause a mess.
If I can use -8 in several locations all the better.
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