Crankcase Ventilation Mod w/Pics
02-02-2009, 07:32 PM
#45
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Where did you get the nice anodized 1/4 pipe plug?
I've tried a few places and all they have are the clunky brass plugs that weigh a ton. I was going to PM you, but other people might want to know, too.
I've tried a few places and all they have are the clunky brass plugs that weigh a ton. I was going to PM you, but other people might want to know, too.
02-03-2009, 12:23 AM
#46
I had other things going on in my motor that did not allow me to reliably evaluate this mod.
I bought the 1/4" plug from Summit. 1/4" NPT Plug
I bought the 1/4" plug from Summit. 1/4" NPT Plug
Last edited by JETPILOT; 02-03-2009 at 12:25 AM.
02-03-2009, 09:38 AM
#47
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I had other things going on in my motor that did not allow me to reliably evaluate this mod.
I bought the 1/4" plug from Summit. 1/4" NPT Plug
I bought the 1/4" plug from Summit. 1/4" NPT Plug
I think this is a great mod for NA engines, too. Drilling out the PCV valve, adding a breather or catch can, and blocking the intake manifold is a great way to relieve crankcase pressure and eliminate oil from getting sucked into the plenum.
02-19-2009, 03:51 PM
#52
As long as you can get it to flow exactly as needed depending on load. It's easy to apply to much vacuum and suck out your oil, apparently, in the articles that I've read. It also depends whether you are looking to actually maintain a vacuum in the cc (reportedly this leads to increased engine output), or just prevent elevated pressure. Put a breather on open ports and you won't go higher than atmosphere!
02-19-2009, 03:58 PM
#54
That will correlate to rpm, not boost. At full boost, excess blow by gases may require the pump to kick in more than it might at mid rpms. So for NA that might be fine... If I were to use a pump, I'd look for an electric one and have a PWM valve in the piping - and drive that solenoid by the EMS so that it is proportional to boost and rpm. An alternative would be to make it proportional to oil pressure.
Last edited by rcdash; 02-19-2009 at 04:02 PM.
Yes, that would work fine for that too.
03-29-2009, 08:12 PM
#57
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Why can't we just put a breather on the top of each valve cover? Is it because they're plastic? I had 2 breathers on each side of my viper and 1 on each side of my transam with small K&N filters. I bought them from a parts store and had my shop install them. Of course the valve covers were aluminum but I see no difference. Is there something that requires us to vent from the plenum?
03-29-2009, 08:22 PM
#58
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Venting the crank case may actually free up HP. There are belt driven vacu pumps out there nascar uses them and they are very effective we just went with a breather tank there was no room in our setup!
https://my350z.com/forum/attachments...rged-tank2.jpg
https://my350z.com/forum/attachments...rged-tank2.jpg
03-29-2009, 08:32 PM
#59
Why can't we just put a breather on the top of each valve cover? Is it because they're plastic? I had 2 breathers on each side of my viper and 1 on each side of my transam with small K&N filters. I bought them from a parts store and had my shop install them. Of course the valve covers were aluminum but I see no difference. Is there something that requires us to vent from the plenum?
Im thinking of throwing some breathers on mine, i believe injected performance and other shops just have breathers on their cars. Can anyone who has thr breathers tell me what sizes i need?
03-29-2009, 08:40 PM
#60
I am in the middle of doing something with my PCV system. I was thinking about drilling the valve, running it to a catch can, and then from the catch can to the turbo intake. I don't see why this wouldn't work. The crankcase will always be in vacuum. It is also very important to get the proper hose. I see many people here using hose that turnes to jello when heated.