323 GTX PCV Valve

T

t3ase

Banned
Contributor
Okay, I talked to the parts guy at the dealership today and we looked at two PCV valves, one from a 323 and one from a 03 Protege. Weird thing is that the 03 Protege one had larger holes than the 323 one. Plus the 323 did not have an elbow at the end, as the 03 Protege one did.

Why would I want to switch to a valve with a smaller opening? Makes no sense..

By the way, they were listed as $15.83 but he could drop that down a bit if I had wanted ten or more of them. If anyone can explain the benefits of the smaller valve, I'll setup a group buy.
 
t3ase said:
Okay, I talked to the parts guy at the dealership today and we looked at two PCV valves, one from a 323 and one from a 03 Protege. Weird thing is that the 03 Protege one had larger holes than the 323 one. Plus the 323 did not have an elbow at the end, as the 03 Protege one did.

Why would I want to switch to a valve with a smaller opening? Makes no sense..

By the way, they were listed as $15.83 but he could drop that down a bit if I had wanted ten or more of them. If anyone can explain the benefits of the smaller valve, I'll setup a group buy.
Click to expand...

Excellant question so bascially this is a "bump" to find the answer. If we come to an agreement that this part would be needed or is a good idea then I'll be down for your group buy most likely.
 
well the old 323 engine was a 1.6, maybe that would explain the size diff regarding the hole. The elbow might just be an engineering change to accomodate the newer engine. Just speculation folks, nothing to see here, move along...... :)
 
MazdaspeedZOOM said:
Good resource but doesn't fully explain the orginal questions about the size of the whole and the bend.
Click to expand...
i know, it was more of a bumping post hoping the original poster would see it. speaking of bumping, bump
 
For those who did not see the last thread.........

The PCV Valve was introduced into normal production on passenger cars in 1963 as a part of a Governmental push to reduce exhaust emissions from passenger cars. It's job is to relieve positive air pressure from the crank case, pull fumes from the crank case to be re-burned, and to keep fresh air flowing inside the engine.
Click to expand...

The PCV on a N/A 2.0L protege will handle a header, an intake, You could probably even spray No2.

Add Boost? Sure 6 psi it will be fine. 10 psi +? Not a snow ball's chance in hell!

What happens is the diaphram or butterfly inside the valve gets blown out from the extra CFM that forced induction creates.

So the air being sucked out of the Crankcase is travelling way too fast for the stock valve to handle in turn pulling oil and sludge with it. You will end up with oil and sludge in your intake manifold, on your valve cover, hindering performance This is an issue amungst Miata owners around North America.

The smaller yet more effective 323 GTX valve holds 9 psi stock!

Or you could always just replace your PCV valve every oil change.
 
MSPDAVE125 said:
For those who did not see the last thread.........



The PCV on a N/A 2.0L protege will handle a header, an intake, You could probably even spray No2.

Add Boost? Sure 6 psi it will be fine. 10 psi +? Not a snow ball's chance in hell!

What happens is the diaphram or butterfly inside the valve gets blown out from the extra CFM that forced induction creates.

So the air being sucked out of the Crankcase is travelling way too fast for the stock valve to handle in turn pulling oil and sludge with it. You will end up with oil and sludge in your intake manifold, on your valve cover, hindering performance This is an issue amungst Miata owners around North America.

The smaller yet more effective 323 GTX valve holds 9 psi stock!

Or you could always just replace your PCV valve every oil change.
Click to expand...

I'm just worried that it being smaller in size it will cause more pressure in the head there for hindering performance in that matter. I just can't see how a smaller valve is better for flow?
 
I don't think we should be as concerned about how much the valve flows as to what the valve flows.

The big concern is a plugged valve and a valve that let's other materials through other than waste gases.

If you are concerened however. Than just by 5 PCV valves and replace as needed.
 
I think he's getting at the fact that the durability of the valve is more important than the relative size of the opening. That's my take on it anyway. :)
 
If the valves were the same size, I'd have no problem recommending it and setting up a group buy through my dealer so we could get them for around $10 each shipped. However, before I do that, I'm still concerned about the opening size. I've physically seen both valves side by side and the difference is very noticable. Will this difference hamper air flow? Just because another product is "made for boost" does not mean it will benefit this engine. Correct me if I'm wrong, but LinuxRacr and big_ben both have turbo setups on their Protege engines and they didn't once mention this new valve.

I'm not trying to b**** to you but I need something more than "the valve holds boost better" when the diameter of the hoses are obviously different. I, for one, do not feel comfortable sticking in a more restrictive part, just because the valve is different, into this setup that already seems like it's suffering from not enough air.
 
hey guys for the air flow of the PCV valves...we are not talking about something that flows incrediable amounts of air. This just helps vent combustion gases out of your crankscase. This small amount of gas mixture slips past your piston rings. So trust me I seriously doubt it is a problem...can you say hose clamps to hold it in place?
 
I brought this up to the guys at Spool as well and they had never heard of doing this either. They haven't had any problems with their PCV's either. I figured they would know if there was a problem because they would a.) see it first hand or b.) have a customer complain to them about it.
 
Yeah, I think I'm sticking with stock here. Even if the air flow is small, I don't see a realistic reason why I should go ahead and switch out the valve when it's in perfect working order as-is. If it leaks/breaks/whatever, get it covered by warranty and then replace it if you choose to at that time.
 
I'm not sure what to think accually since I need to research what the PCV valve accually does.
 
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