Adding/Switching to BOV for Supercharger - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Heat Sinker · 07-08-2018, 06:23 PM

I searched around the forums and did not come across any thing that really answered my question.

I have a JRSC on currently and I want to add a Greddy RS BOV to the system. I have a HKS SSQV (2 or 3) available right now till I can buy the Greddy.

My question is what would be the process add a BOV that vents to the atmosphere?
I assume I would need to find a proper spring (for HKS) and the Greddy is a turn dial??
What are the implications of changing the system? I have an understanding that I am changing the air flow in the system and it can interfere with the performance as I am taking air away from the system that the MAF has already calculated into the equation. Is that correct? Would I need to have my car's tune adjusted or can I just install it and be on my way?

Please feel free to add anything else I am missing.

Thank you in advance. This is more a cosmetic thing than a performance modification.

EchoHotel · 07-08-2018, 07:12 PM

I have a tail Q50 mm with supercharger spring and it’s great. It’s a 2psi spring rate.
Hope that helps.
Erik

mrg666 · 07-08-2018, 08:18 PM

Quote:

Originally Posted by Heat Sinker

I searched around the forums and did not come across any thing that really answered my question.

I have a JRSC on currently and I want to add a Greddy RS BOV to the system. I have a HKS SSQV (2 or 3) available right now till I can buy the Greddy.

My question is what would be the process add a BOV that vents to the atmosphere?
I assume I would need to find a proper spring (for HKS) and the Greddy is a turn dial??
What are the implications of changing the system? I have an understanding that I am changing the air flow in the system and it can interfere with the performance as I am taking air away from the system that the MAF has already calculated into the equation. Is that correct? Would I need to have my car's tune adjusted or can I just install it and be on my way?

Please feel free to add anything else I am missing.

Thank you in advance. This is more a cosmetic thing than a performance modification.

Your answer is in JRSC owner's thread. You didn't search enough.

Heat Sinker · 07-08-2018, 09:11 PM

Quote:

Originally Posted by mrg666

Your answer is in JRSC owner's thread. You didn't search enough.

Thanks for the tip, I searched through all 17+ pages my search/s came up with and didn't not find what I was looking for. I saw 3 of your posts which one basically states to not do it it can damage your SC.
The other two I saw was your posts that were talking about updating the diverter valve to a metal one vs the OEM plastic one.

Summerwolf · 07-08-2018, 09:45 PM

Pg 42. 308, 309.... look like good places to start in the JRSC owners thread. I just did a 5 second Google search and quick perusal.

Heat Sinker · 07-08-2018, 09:49 PM

Quote:

Originally Posted by Summerwolf

Pg 42. 308, 309.... look like good places to start in the JRSC owners thread. I just did a 5 second Google search and quick perusal.

I saw those.
The conversation was asking about putting on a BOV, the asked why would someone want to. Followed up with it’s a BPV essentially the same thing.
The next 5 pages I went through did not continue this conversation.

Thank you though.

Sent from my iPhone using Tapatalk

Summerwolf · 07-08-2018, 09:58 PM

There are pictures and quite a bit of conversation concerning adding a Bov, direct replacement part numbers and also some interesting comments from @CSG Mike

Heat Sinker · 07-08-2018, 10:00 PM

Quote:

Originally Posted by Summerwolf

There are pictures and quite a bit of conversation concerning adding a Bov, direct replacement part numbers and also some interesting comments from @CSG Mike

Apologies I read only page 42.... for some reason I thought I was looking for post 308-309 instead of page 308-309. Reading it now
Thank you

Sent from my iPhone using Tapatalk

CSG Mike · 07-09-2018, 05:15 AM

You can just weld it onto your charge pipes.

Probably before your air straightener in your case.

You WILL need a re-tune.

07-08-2018, 06:23 PM	#1
Heat Sinker Senior Member Join Date: Feb 2016 Drives: 2016 FR-S Location: H-Town Texas Posts: 147 Thanks: 12 Thanked 61 Times in 43 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Adding/Switching to BOV for Supercharger I searched around the forums and did not come across any thing that really answered my question. I have a JRSC on currently and I want to add a Greddy RS BOV to the system. I have a HKS SSQV (2 or 3) available right now till I can buy the Greddy. My question is what would be the process add a BOV that vents to the atmosphere? I assume I would need to find a proper spring (for HKS) and the Greddy is a turn dial?? What are the implications of changing the system? I have an understanding that I am changing the air flow in the system and it can interfere with the performance as I am taking air away from the system that the MAF has already calculated into the equation. Is that correct? Would I need to have my car's tune adjusted or can I just install it and be on my way? Please feel free to add anything else I am missing. Thank you in advance. This is more a cosmetic thing than a performance modification.

07-08-2018, 07:12 PM	#2
EchoHotel Member Join Date: Apr 2017 Drives: 2013 FR-S Hot Lava Location: Ohio Posts: 13 Thanks: 0 Thanked 4 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I have a tail Q50 mm with supercharger spring and it’s great. It’s a 2psi spring rate. Hope that helps. Erik Last edited by EchoHotel; 07-08-2018 at 08:16 PM.

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07-08-2018, 09:45 PM	#5
Summerwolf Panda Trueno Join Date: Jan 2015 Drives: No twin now. Location: North Indiana Posts: 3,347 Thanks: 2,113 Thanked 2,407 Times in 1,332 Posts Mentioned: 17 Post(s) Tagged: 2 Thread(s)	Pg 42. 308, 309.... look like good places to start in the JRSC owners thread. I just did a 5 second Google search and quick perusal.

07-08-2018, 09:58 PM	#7
Summerwolf Panda Trueno Join Date: Jan 2015 Drives: No twin now. Location: North Indiana Posts: 3,347 Thanks: 2,113 Thanked 2,407 Times in 1,332 Posts Mentioned: 17 Post(s) Tagged: 2 Thread(s)	There are pictures and quite a bit of conversation concerning adding a Bov, direct replacement part numbers and also some interesting comments from @CSG Mike

07-09-2018, 05:15 AM	#9
CSG Mike Join Date: Jul 2012 Drives: S2000 CR Location: Orange County Posts: 14,529 Thanks: 8,918 Thanked 14,175 Times in 6,834 Posts Mentioned: 966 Post(s) Tagged: 14 Thread(s)	You can just weld it onto your charge pipes. Probably before your air straightener in your case. You WILL need a re-tune.

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