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Running Radium AOS instead of catch can. Keep PCV?


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#1 HoosierDaddy_RS

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Posted 11 March 2019 - 06:55 PM

Hey guys I have an 87 MPI car and am going to be running around 15-20 psi typically. My car is a summer backroads driver, not a race car. I was planning on running the Radium AOS and was told to block off the PCV since Iíd be running this setup. I hear guys who run it blocked and run it still on.

Any advice? Thanks!

Hereís the AOS:
http://www.radiumaut...AOS-R-P890.aspx





#2 speedyquest

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Posted 11 March 2019 - 09:37 PM

There are a couple of things that matter. Is the car going to be speed density or still run a mas/maf? Otherwise it's kind of a up to you. The PVC setup creates crankcase vacuum under idle, cruise, and non-boost conditions. Unless you create that vacuum in another way if you plug it you'll lose that.

Edited by speedyquest, 11 March 2019 - 09:37 PM.

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#3 Funky Phil

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Posted 12 March 2019 - 01:15 AM

All your doing is taking the place of the factory ďAOSĒ so no every thing stays the same. Now you just have a fancier separator than stock.

When you say ďpcvĒ are you referring to the checkvalve at the front of the head?
That  prevents Boost from entering valve cover .
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#4 tux

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Posted 12 March 2019 - 09:10 AM

heh strange, it requires heating

#5 scott87star

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Posted 12 March 2019 - 07:50 PM

Yeah, too much work, do you not have the stock system?  I'm not saying its adequate for the current state of your motor and boost goals but Phil can upgrade that for you.  Way better than having to plumb coolant.
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#6 HoosierDaddy_RS

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Posted 13 March 2019 - 04:54 PM

Yea Phil I was referring to the check valve. I forget where but I heard someone say the factory valve isnít good for MPI or certain boost levels. True? Iím only going to be hitting probably 20psi at most.

#7 HoosierDaddy_RS

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Posted 13 March 2019 - 04:56 PM

I donít have the stock system and I really wanted to try this system out. Iíll have to find a good place to tap, probably somewhere on the exhaust side of the cooling system.

#8 tux

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Posted 13 March 2019 - 08:25 PM

Gonna have to grab off the turbo

#9 HoosierDaddy_RS

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Posted 13 March 2019 - 08:36 PM

Thatís what I was planning

#10 kev

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Posted 14 March 2019 - 09:21 AM

What will be your method of suction?

#11 HoosierDaddy_RS

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Posted 14 March 2019 - 04:56 PM

The clean air gets routed post air filter.

#12 HoosierDaddy_RS

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Posted 14 March 2019 - 05:34 PM

The coolant I think Iíll try to route in series after the turbo. The oil is going to the timing cover since the turbo drain is going to the pan.

#13 HoosierDaddy_RS

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Posted 14 March 2019 - 05:34 PM

The coolant I think Iíll try to route in series after the turbo. The oil is going to the timing cover since the turbo drain is going to the pan.

#14 kev

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Posted 21 March 2019 - 11:32 AM

View PostHoosierDaddy_RS, on 14 March 2019 - 04:56 PM, said:

The clean air gets routed post air filter.

It's not going to be enough.   Keep your pcv valve if you go this route.

#15 kev

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Posted 22 March 2019 - 12:11 PM

This can has some good positives in that it 'cleans' the oil prior to dumping back into the pan which also results in clean air purged into the intake tract.   Although it does not resolve the overall issue of a poor crankcase ventilation system on our cars.   For the system to be enhanced, it requires a sufficient purge system to evacuate the medium with minimal loss in addition to a method to provide a vacuum to the crankcase.    This may help a little to remove some of the restrictions from the factory separator (depending on the hose/hardline you use...what about the primary restriction of that 10mm port on the vacuum cover?) but it will not aide in providing a vacuum.    The suction from the air inlet is not sufficient enough to provide good suction.   Therefore you are relying on the PCV system to provide the vacuum on idle and off boost conditions while resorting on the separator to simply allow gasses to escape the crankcase on boost due to pressurization.      Now think about your PCV system, it's sucking in the same non-cleansed gases/oil mixture as the can but it isn't filtered from the can.  You'll still get the oily film in your intake lines.    To me, the only measurable gain by this can is that you are putting cleaner oil back into the pan.     I'd put in a much less expensive can but have a manual drain to purge the oil.  

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#16 Funky Phil

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Posted 22 March 2019 - 12:51 PM

If your putting enough oil in a catch can that you depend on it draining to the pan, you likely have other issues.
10.95@120mph  https://m.youtube.co...h?v=8Q01UKt5q4U
Built G54B, S364, R154, stock 6-bolt, fireballs




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