Proper placement for a cutout valve? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Wil · 08-31-2016, 04:56 AM

Hi everyone,

Like a lot of folks here, I'm in a love/hate relationship with the stock muffler.
Love because it can be super quite which is super pleasant in some situations.
Hate because it is super quite which is super unpleasant in some situations.

That's why I would like to install an exhaust cutout on my stock muffler.

Problem:
There isn't much room.

Challenge:
I want the cutout to flow back into one of the tailpipes. So, if the cutout leaks when shut, the frrrrrrrpppp sounds can be covered by the stock exhaust sound. Plus, it's much cleaner than just deviating the exhaust gas towards the ground.

After many many design attempts, I believe the easiest way to do so is to wield the tubing on the right

My concern and question is: Do you think the sound that's coming out of the 4th chamber will please the ear?

It's pretty hard, in such setup to place the valve anywhere else.

In advance, thank you for your eventual contribution.
Have a nice day,
RW

humfrz · 08-31-2016, 02:39 PM

Well, now, that looks to be an interesting project.

What would it sound like? I reckon the only way to find out is to try it ....

It would seem to me that by placing a cut-out coming out of the muffler, it would create a turbulence in the exhaust flow, which would not be good.

If you proceed, please let us know how it turns out.

humfrz

projectXTR · 09-01-2016, 09:28 AM

Wouldn't this make your exhaust even more quiet?
Or are you planning on changing other parts of your exhaust aswell?

JazzleSAURUS · 09-01-2016, 10:08 AM

I think the best way to find out is to try it. It's not an approach I would take personally because you'll be adding a decent amount of weight to the already very heavy stock exhaust system.

sw20kosh · 09-01-2016, 10:13 PM

this is where I put mine

humfrz · 09-02-2016, 01:12 AM

Quote:

Originally Posted by sw20kosh

this is where I put mine

.....and, what does that sound like .. ??

humfrz

jarnojvv · 09-02-2016, 01:16 AM

Quote:

Originally Posted by sw20kosh

this is where I put mine

Thats pretty cool, please share some more pics?

sw20kosh · 09-02-2016, 02:09 AM

Quote:

Originally Posted by humfrz

.....and, what does that sound like .. ??

humfrz

Great on a JDL UEL header with Nameless Catted and Resonated FP. Terrible on a ACE 350 + ACE FP.

08-31-2016, 04:56 AM	#1
Wil Senior Member Join Date: Jun 2015 Drives: Drives like a crab. Location: Belgium Posts: 101 Thanks: 2 Thanked 42 Times in 14 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Proper placement for a cutout valve? Hi everyone, Like a lot of folks here, I'm in a love/hate relationship with the stock muffler. Love because it can be super quite which is super pleasant in some situations. Hate because it is super quite which is super unpleasant in some situations. That's why I would like to install an exhaust cutout on my stock muffler. Problem: There isn't much room. Challenge: I want the cutout to flow back into one of the tailpipes. So, if the cutout leaks when shut, the frrrrrrrpppp sounds can be covered by the stock exhaust sound. Plus, it's much cleaner than just deviating the exhaust gas towards the ground. After many many design attempts, I believe the easiest way to do so is to wield the tubing on the right My concern and question is: Do you think the sound that's coming out of the 4th chamber will please the ear? It's pretty hard, in such setup to place the valve anywhere else. In advance, thank you for your eventual contribution. Have a nice day, RW Attached Images

09-01-2016, 10:08 AM	#4
JazzleSAURUS Senior Member Join Date: May 2015 Drives: 15 BRZ LTD, 05 FXT Location: Western MA Posts: 1,032 Thanks: 561 Thanked 558 Times in 351 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	I think the best way to find out is to try it. It's not an approach I would take personally because you'll be adding a decent amount of weight to the already very heavy stock exhaust system. __________________ SOLD: 2015 WRB BRZ Limited ('02 WRX BBS, S-04's, Stoptech Sport pads, MXP SP, AVO drop in filter, Mishimoto Intake tube, decatted header, OFT 93 Stage 2 EL Tune, Kartboy rear shifter bushing, Whiteline transmission and subframe lockout bushings, ST Coilovers, SPC Camber bolts w/smaller crash bolt, SPC LCA's & SPC Toe Arm bushings, Red TOMs, TRD Wing.)

09-01-2016, 10:13 PM	#5
sw20kosh Senior Member Join Date: Jul 2012 Drives: 2013 Black FR-S Location: SF Posts: 3,030 Thanks: 881 Thanked 2,014 Times in 990 Posts Mentioned: 153 Post(s) Tagged: 1 Thread(s)	this is where I put mine __________________ 86DRIVE Challenge

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08-31-2016, 02:39 PM	#2
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 29,871 Thanks: 28,793 Thanked 31,825 Times in 16,428 Posts Mentioned: 708 Post(s) Tagged: 2 Thread(s)	Well, now, that looks to be an interesting project. What would it sound like? I reckon the only way to find out is to try it .... It would seem to me that by placing a cut-out coming out of the muffler, it would create a turbulence in the exhaust flow, which would not be good. If you proceed, please let us know how it turns out. humfrz

09-01-2016, 09:28 AM	#3
projectXTR Senior Member Join Date: Dec 2012 Drives: Sterling Silver BRZ Location: Belgium Posts: 303 Thanks: 100 Thanked 74 Times in 49 Posts Mentioned: 2 Post(s) Tagged: 1 Thread(s)	Wouldn't this make your exhaust even more quiet? Or are you planning on changing other parts of your exhaust aswell?

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