Spring valve exhaust options? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Liquidsnake · 03-11-2022, 07:57 PM

Spring valve exhaust options? Are there any exhausts that are spring loaded in which the valve opens under pressure or when you hit the accelerator? I’m looking for an exhaust where the valves open under load. Any options out there?

x808drifter · 03-11-2022, 10:01 PM

yes

Dake · 03-11-2022, 10:51 PM

/thread closed

Liquidsnake · 03-11-2022, 11:46 PM

Any names? Who makes exhausts like that?

bcj · 03-12-2022, 11:33 AM

I've seen the ones that work with gravity.
May be able to retrofit a spring.

Sapphireho · 03-12-2022, 11:39 AM

Quote:

Originally Posted by Liquidsnake

Any names? Who makes exhausts like that?

John Deere?

Liquidsnake · 03-12-2022, 02:33 PM

Am I missing something? Why is everyone making jokes?

I have 124 Abarth with the Record Monza Exhaust that opens and closes under pressure. I absolutely love the way it sounds, It has zero drone.

With an 86 on order, I was looking for something similar where its not loud or droning on the freeway but when you punch it its very nice.

If I am explaining things in a rudimentary or silly way I apologize, I am not sure where the jokes come from, or what they are referencing. Just wanted some advice.

Im only looking for Axelback.

Dake · 03-12-2022, 03:27 PM

Two reasons: 1, it's the internet and B, you can search this very website to find similar questions and answers.

The short answer is "yes"

The slightly longer answer is "Yes, you can add a bypass into your existing exhaust or most any after market exhaust that works either mechanically or electronically. People have been doing it to their cars for decades."

I don't think a ton of people here have done it though because in the end we're still talking about a four cylinder motor. Going straight-pipe is going to mostly sound obnoxious and will offer very little performance gain.

LimitedSlip · 03-12-2022, 04:04 PM

Depending upon the noise ordinances in your particular jurisdiction you may also be rewarded with a fine courtesy of the local constabulary.

bcj · 03-13-2022, 12:34 PM

Terminology is what got me I guess.
Waaaay back in teh day it used to be called exhaust cut outs and they were usually flat plates you could unbolt once you got to the dragstrip or dry lake so you wouldn't be arrested on your way there.

The new ones mostly seem to be electronically controlled for ON / OFF.

Hadn't heard of spring controllers like a turbo blow off for exhaust. Hadn't been following Abarth.
I suppose with a semi-weedy small displacement engine it would work sort of.
An extremely stroked big block could be annoying at anything above idle. Probably even worse warming it up in the garage.

Liquidsnake · 03-13-2022, 04:57 PM

Quote:

Originally Posted by bcj

Terminology is what got me I guess.
Waaaay back in teh day it used to be called exhaust cut outs and they were usually flat plates you could unbolt once you got to the dragstrip or dry lake so you wouldn't be arrested on your way there.

The new ones mostly seem to be electronically controlled for ON / OFF.

Hadn't heard of spring controllers like a turbo blow off for exhaust. Hadn't been following Abarth.
I suppose with a semi-weedy small displacement engine it would work sort of.
An extremely stroked big block could be annoying at anything above idle. Probably even worse warming it up in the garage.

If you read the description it talks about a spring loaded diversion Valve. This is the best exhaust I’ve ever had in my life and I was just looking to replicate it with a GR 86 https://www.moparonlineparts.com/sku/82215590.html

bcj · 03-14-2022, 11:58 AM

Looks fairly simple. get a Mr. Gasket cutoff and replace the cable with a BOV spring of whatever weight pleases you most.

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03-11-2022, 07:57 PM	#1
Liquidsnake Senior Member Join Date: Apr 2012 Drives: "I drives like a Porsche" Location: LA Posts: 638 Thanks: 89 Thanked 245 Times in 136 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Spring valve exhaust options? Spring valve exhaust options? Are there any exhausts that are spring loaded in which the valve opens under pressure or when you hit the accelerator? I’m looking for an exhaust where the valves open under load. Any options out there? __________________ Last edited by Liquidsnake; 03-11-2022 at 11:46 PM.

03-11-2022, 11:46 PM	#4
Liquidsnake Senior Member Join Date: Apr 2012 Drives: "I drives like a Porsche" Location: LA Posts: 638 Thanks: 89 Thanked 245 Times in 136 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Any names? Who makes exhausts like that? __________________ Last edited by Liquidsnake; 03-12-2022 at 09:22 AM.

03-12-2022, 02:33 PM	#7
Liquidsnake Senior Member Join Date: Apr 2012 Drives: "I drives like a Porsche" Location: LA Posts: 638 Thanks: 89 Thanked 245 Times in 136 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Am I missing something? Why is everyone making jokes? I have 124 Abarth with the Record Monza Exhaust that opens and closes under pressure. I absolutely love the way it sounds, It has zero drone. With an 86 on order, I was looking for something similar where its not loud or droning on the freeway but when you punch it its very nice. If I am explaining things in a rudimentary or silly way I apologize, I am not sure where the jokes come from, or what they are referencing. Just wanted some advice. Im only looking for Axelback. __________________

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03-11-2022, 10:01 PM	#2
x808drifter LMGTFY Join Date: Mar 2016 Drives: 13 FRS, 91 Miata Location: Lava Town, HI Posts: 2,776 Thanks: 5,561 Thanked 3,646 Times in 1,625 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	yes

03-11-2022, 10:51 PM	#3
Dake Senior Member Join Date: Aug 2012 Drives: FR-S Location: Houston Posts: 1,056 Thanks: 464 Thanked 819 Times in 414 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	/thread closed

03-12-2022, 03:27 PM	#8
Dake Senior Member Join Date: Aug 2012 Drives: FR-S Location: Houston Posts: 1,056 Thanks: 464 Thanked 819 Times in 414 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	Two reasons: 1, it's the internet and B, you can search this very website to find similar questions and answers. The short answer is "yes" The slightly longer answer is "Yes, you can add a bypass into your existing exhaust or most any after market exhaust that works either mechanically or electronically. People have been doing it to their cars for decades." I don't think a ton of people here have done it though because in the end we're still talking about a four cylinder motor. Going straight-pipe is going to mostly sound obnoxious and will offer very little performance gain.

03-12-2022, 04:04 PM	#9
LimitedSlip Senior Citizen Member Join Date: Jul 2018 Drives: Then-1977 Celica GT Now-2017 860SE Location: In A Galaxy Far Far Away Posts: 393 Thanks: 145 Thanked 385 Times in 201 Posts Mentioned: 12 Post(s) Tagged: 1 Thread(s)	Depending upon the noise ordinances in your particular jurisdiction you may also be rewarded with a fine courtesy of the local constabulary.

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