AOS/Catch Can Needed for Supercharger Support Mod? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Jasper · 04-10-2021, 09:38 PM

I know this is one of the most debated questions in the 86 community.
I ask this question because CSG Mike brings up the point of an AOS/Catch Can not being necessary due to the differing design of FA20 vs the traditional boxer motors boxer-heads like to focus on (mainly the EJ). So what do the other 86 owners think? I'd like to hear from everyone who has a strong opinion!

tomm.brz · 04-11-2021, 05:34 AM

my PCV side catch can collects a lot of oil and i m not the only one who noticed it

the crank side is almost irrelevant, but a catch can on the pcv side isn t toally useless
not mandatory though

Jasper · 04-11-2021, 03:20 PM

Quote:

Originally Posted by tomm.brz

my PCV side catch can collects a lot of oil and i m not the only one who noticed it

the crank side is almost irrelevant, but a catch can on the pcv side isn t toally useless
not mandatory though

So even a single catch can on the PCV side should be plenty? Or would you recommend the dual Radium setup?

tomm.brz · 04-11-2021, 03:30 PM

i have the dual radium

crank side doesn't catch a thing

I'm even tempted to sell it for money and keep just the pcv side

04-10-2021, 09:38 PM	#1
Jasper Member Join Date: Apr 2021 Drives: 2023 GR86 Location: NoVA Posts: 51 Thanks: 32 Thanked 16 Times in 10 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	AOS/Catch Can Needed for Supercharger Support Mod? I know this is one of the most debated questions in the 86 community. I ask this question because CSG Mike brings up the point of an AOS/Catch Can not being necessary due to the differing design of FA20 vs the traditional boxer motors boxer-heads like to focus on (mainly the EJ). So what do the other 86 owners think? I'd like to hear from everyone who has a strong opinion!

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04-11-2021, 05:34 AM	#2
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,282 Thanks: 515 Thanked 1,123 Times in 813 Posts Mentioned: 70 Post(s) Tagged: 0 Thread(s)	my PCV side catch can collects a lot of oil and i m not the only one who noticed it the crank side is almost irrelevant, but a catch can on the pcv side isn t toally useless not mandatory though

04-11-2021, 03:30 PM	#4
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,282 Thanks: 515 Thanked 1,123 Times in 813 Posts Mentioned: 70 Post(s) Tagged: 0 Thread(s)	i have the dual radium crank side doesn't catch a thing I'm even tempted to sell it for money and keep just the pcv side

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