Catch Can Debate

[ATL BRZ]

Originally Posted by wootwoot

I also like the moroso unit. It looks very simple and effective. It seems a bit small though. How often do you have to empty it?

I've done maybe 450-500 miles with one track day on it and I haven't tried to empty it yet. I'll probably see what's in there after 1000 miles.

[ANTI_LAG]

One thing to remember is the D3 Catch Can System does something none of the other catch cans out offer, it vents to atmosphere allowing nice clean air to enter the engine. The air that is released from the Pcv system is already burnt, so sucking this back into the engine gives a sort of egr effect, this is counter productive to making power. Also we offer 2 different mounting locations and fully bolt in. No rigging or custom work needed to install. We also don't use one tiny bracket to mount it, allowing it to be rattle free and won't crack at the welds from vibration fatigue. Comes with install instructions and all needed hardware.

http://www.ft86club.com/forums/showthread.php?t=19445

[ANTI_LAG]

Originally Posted by ichitaka05

I've freaking found the pics I was talking bout

That catch can only cat us oil from the front Pcv port, what about the rear one lol. Ours catches front and rear Pcv ports. Some people have also used the moroso and eBay cans, they share the same issue.

[Captain Snooze]

Originally Posted by ANTI_LAG

One thing to remember is the D3 Catch Can System does something none of the other catch cans out offer, it vents to atmosphere allowing nice clean air to enter the engine.

I think Radium might beg to differ.

[ichitaka05]

Originally Posted by ANTI_LAG

That catch can only cat us oil from the front Pcv port, what about the rear one lol. Ours catches front and rear Pcv ports. Some people have also used the moroso and eBay cans, they share the same issue.

Is there a possible of doing like this, but your style and catches both front and rear and used oil will go back from oil cap, so we don't waste any oil

[wootwoot]

First: Not sure how I feel about the sales pitch in the thread... But I don't own the thread so I guess I can't say much about it. Am I wrong in thinking it isn't the best form?

I will say ANTI_LAG brings up two good points:

1. Catching blow by from the front AND rear PCV is a good idea and something very few catch cans accomplish. You need one purpose built in this way, a dual can, or two single cans to do this. This is a must for turbo/supercharge guys.

2. He also brings up the debate between open and closed catch cans: I myself am a proponent of closed systems and have never, until today, found anyone that was in favor of opening the PCV system (with the exception of racing applications). Even looking at Radiums sight it says: "Radium Engineering does not necessarily condone an open PCV system, however, there are many applications that demand this setup."
It goes on to say:
Open PCV System Advantages:
Completely eliminates any chance of oil vapor returning into the intake air stream and collecting in idle air control valves, intercoolers, etc.
Required for specific applications. For example, a race car using a turbocharger system without a compressor inlet pipe.
I believe one of the disadvantages is that the open system brings in un-metered. I think I have read that it also, in essence, creates a vacuum leak as the system is now open to the atmosphere. Perhaps someone (ANTI_LAG?) can describe the benefits of an open type catch can? And, specifically, why it is better than a closed system?

[xwd]

I somewhat chose the Crawford can because it doesn't alter how the PCV system works. In the SCCA Solo2 Stock/RTR autocross classes you have to keep the system intact.

[wootwoot]

Originally Posted by ichitaka05

Is there a possible of doing like this, but your style and catches both front and rear and used oil will go back from oil cap, so we don't waste any oil

I think you could just plumb the drain of any dual oil catch can into your oil cap and that would take care of it. I'd buy a spare or an aftermarket cap to do it... and you would have to have a drill press, tap, etc. But it wouldn't be difficult.

Again, we have to ask ourselves if putting the blow-by back into the engine is a good idea. I buy quality oil and don't want to waist it. But I would rather dump that blow-by out as it is already burned and possibly mixed with water at that point (I see many cars from other communities catching oil and water in their cans).

Lastly, you could simply buy TWO CANS (or a dual can) to catch the front and rear PCV ports. You don't necessarily need a special can. Given what some vendors are charging for their FRS-specific catch can systems you could easily buy two cheaper cans and have money left to burn.

[ANTI_LAG]

No a open system does not create a vacuum leak or unmetered air, if it did our turbo kits wouldn't work. Our kit comes with plugs to go onto the intake pipe and on the back of the intake manifold.

Also it was asked if we will ever do a closed setup and the answer is no, we will only produce what we feel is the best method of the product and a closed design would not meet that criteria. Also a line to the oil cap is a waste as unless the can is overflowing no oil will go back through it, gravity kind of controls that situation.

I also saw a limited edition Ford Motorsports Mustang at PRI that you can order from the dealer and it had a vented to atmosphere catch can.... That's from a Oem manufacturer.

[wootwoot]

Originally Posted by ANTI_LAG

No a open system does not create a vacuum leak or unmetered air, if it did our turbo kits wouldn't work. Our kit comes with plugs to go onto the intake pipe and on the back of the intake manifold.

Also it was asked if we will ever do a closed setup and the answer is no, we will only produce what we feel is the best method of the product and a closed design would not meet that criteria. Also a line to the oil cap is a waste as unless the can is overflowing no oil will go back through it, gravity kind of controls that situation.

I also saw a limited edition Ford Motorsports Mustang at PRI that you can order from the dealer and it had a vented to atmosphere catch can.... That's from a Oem manufacturer.

Interesting. This is why I started this thread!

Can you help me understand how your system works? I think you plug the intake outlet and the outlet going from the intake manifold so they are air tight and no longer pushing anything into the engine. You then route the hoses from the engine, which are creating vacuum, to your catch can. This means when the engine creates vacuum it sucks clean air through the filter on your catch can. Do I have it correct? Or do I have the vacuum reversed and it is the motor that is pushing the hot gas back into the intake stream? In which case are you plugging the outlets that go into the engine and connecting the PCV to the can so they suck clean air?

If this is correct, I have a few questions and concerns, but I want to make sure I understand what is going on before I ask.

[OrbitalEllipses]

Originally Posted by wootwoot

EVERYONE PLEASE: This is not a debate about the need for a catch can. This is a place to discuss the available catch cans and their designs. Threads have a way of going on tangents in this forum so lets try and keep things on track.

Then I would rename the thread "catch can differentiation" rather than having the word "debate" in the title. I will now not give you my personal feelings about catch cans on this vehicle, though I would like to see a thread with vendors and other forum members discussing pros v. cons and need v. want.

FWIW, there's an x-ray of the Crawford unit on NASIOC somewhere.

[DaJo]

Originally Posted by OrbitalEllipses

Then I would rename the thread "catch can differentiation" rather than having the word "debate" in the title. I will now not give you my personal feelings about catch cans on this vehicle, though I would like to see a thread with vendors and other forum members discussing pros v. cons and need v. want.

FWIW, there's an x-ray of the Crawford unit on NASIOC somewhere.

I did not find an x-ray but here's a dissection of it...

[OrbitalEllipses]

^http://forums.nasioc.com/forums/show...08&postcount=1

X-ray pictures in that post; same thread the cut-away pictures.

[zex]

Which radium catch can fits the frs/brz?