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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 06-03-2014, 05:19 PM   #15
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Isn't there cause for concern with the high amount of blowby some of you are getting?? I have one Radium catch can for the PCV, and one for the breather. The breather is bone dry, and the PCV only has a few drops.

This is after 4 track days and aprox 5k miles of daily driving. I don't quite understand how some of you are getting sooooooo much blowby.
Have you been running an element or scrubber? What mods and power levels?
For the reference, I also check my oil levels between sessions and I didn't notice any oil consumption ( at least not something noticeable)
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Old 06-03-2014, 05:22 PM   #16
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@TemeCal what kind of oil have you been running? I wonder if it has to do something with the moly content
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Old 06-03-2014, 07:40 PM   #17
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Have you been running an element or scrubber? What mods and power levels?

For the reference, I also check my oil levels between sessions and I didn't notice any oil consumption ( at least not something noticeable)

I have the Innovate supercharger (intercooled), Perrin catback, Robispec cooler, radium catch cans, etc. I'm at aprox 240whp.
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Old 06-03-2014, 07:41 PM   #18
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@TemeCal what kind of oil have you been running? I wonder if it has to do something with the moly content

0w20 Eneos Sustina
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Old 06-03-2014, 10:09 PM   #19
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Has anyone analyzed what is in the cans? I'm wondering how much of it is fuel and/or water and how much of it is oil.
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Old 06-03-2014, 10:52 PM   #20
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Has anyone analyzed what is in the cans? I'm wondering how much of it is fuel and/or water and how much of it is oil.
Running e85 in a cold climate has filled my can with water condensate several times. I haven't gotten much oil though.
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Old 06-03-2014, 11:29 PM   #21
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Running e85 in a cold climate has filled my can with water condensate several times. I haven't gotten much oil though.
That' more likely blow by than oil which can be mostly vaporized oil being agitated in the crank case and sucked into the pcv.
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Old 06-04-2014, 12:10 AM   #22
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Edit: How many of those baffle mesh things are you using in your radium catch can on the PCV side? I'm not using any at all.
I didn't remove any mesh things from the cans. I bought the "FT86" catch can kit, which I assumed had the number of baffles preset. The instructions didn't say anything about removing any either.

I did, however, think about it a bit (since @Dezoris did such a nice write up on it). Now I'm starting to wonder if I should crack it open and remove a few????
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Old 06-04-2014, 12:30 AM   #23
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Well every can is different in how it condenses oil and so is every motor.
The Radium can which I used on about 6 different cars now used to use stackable stainless screens to help condense the oil. I always used 4 screens, Lotus, Honda, Hyundai, Subaru never had a problem and the oil weight has no bearing on it. I used low and high moly oils as well.

Radium has since added the stainless scrubber on top of the screens which I believe is to help further condense oil and potentially stop any sloshing upward.
@TemeCal

I would put stainless scrubber in between those two pieces with the holes.
(Not a lot though) I dont think that is enough to help condense the oil properly and the vapor is flowing right back out of the can. There is also basically no baffling in the can either so you need to check it often if you add the scrubber.

Reason I stuck with the Radium is I know it works well. Now I have never installed a can on the breather side until I did forced induction on this car.

The other major benefit to having can on the breather side even if you don't catch anything in it, one day if you start catching oil on the breather side its a good sign there is a problem with the PCV vent, or valve and should check that.
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Old 06-04-2014, 12:33 AM   #24
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Has anyone analyzed what is in the cans? I'm wondering how much of it is fuel and/or water and how much of it is oil.
Its almost 80% unburned fuel the rest oil and some moisture. I ran an analysis on my old Hyundai. That car had a ton of blowby and it was DI so I was anal about catching it.

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Running e85 in a cold climate has filled my can with water condensate several times. I haven't gotten much oil though.
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Old 06-04-2014, 12:38 AM   #25
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Its almost 80% unburned fuel the rest oil and some moisture. I ran an analysis on my old Hyundai. That car had a ton of blowby and it was DI so I was anal about catching it.
That's what I thought since I didn't notice any oil consumption. I recently ordered Motul V300 5w-30 so let's see if the moly content helps with blow by amount
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Old 06-04-2014, 09:43 AM   #26
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Radium has since added the stainless scrubber on top of the screens which I believe is to help further condense oil and potentially stop any sloshing upward.
@TemeCal

I would put stainless scrubber in between those two pieces with the holes.
(Not a lot though) I dont think that is enough to help condense the oil properly and the vapor is flowing right back out of the can. There is also basically no baffling in the can either so you need to check it often if you add the scrubber.
Thanks! I'll try adding this.
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Old 06-16-2014, 01:23 AM   #27
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Just FYI. I added some scrubber material in the baffle chamber about 500 miles before a track day. The amount of oil caught in the can was notably less than the last track day. Not sure how much oil temps might have to do with it versus the added scrubber as it was a night event and ambien temps were much lower.

Last edited by solidONE; 06-16-2014 at 01:33 AM.
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Old 06-16-2014, 04:49 AM   #28
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No catch can
No problem
60k miles mixed on and off track on one car
20k miles heavy track and high boost on the other
Ran a generic moroso initially, didn't catch much.

When will my motor implode since I don't really think I need a catch can?
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