True dual exhuast - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

ort895 · 02-22-2016, 12:21 AM

I tried searching but nothing came up. Has anybody ever looked into this? I feel like it would be pretty interesting. Taking some welding classes right now, may look into it myself lol

swarb · 02-22-2016, 12:29 AM

Quote:

Originally Posted by ort895

I tried searching but nothing came up. Has anybody ever looked into this? I feel like it would be pretty interesting. Taking some welding classes right now, may look into it myself lol

Why?
Why stop at two? why not make it a true quad?, one for each cylinder.
You are going to have a hard time making a over pipe and have lots of clearance issues. And then finding the right shaped(oval? half circle?) piping to make it happen. And then it is going to be heavy. Don't waste your time.

ort895 · 02-22-2016, 12:40 AM

Quote:

Originally Posted by swarb

Why?
Why stop at two? why not make it a true quad?, one for each cylinder.
You are going to have a hard time making a over pipe and have lots of clearance issues. And then finding the right shaped(oval? half circle?) piping to make it happen. And then it is going to be heavy. Don't waste your time.

I thought it would be a pretty cool project, especially if done right. But thanks for the opinion!

ryoma · 02-22-2016, 12:56 AM

if you have the time and material to do it, definitely do it if you want to. though, you will most likely run into problems since the stock overpipe is already so tight I doubt you will be able to run another pipe through the same spot. I don't even think there is room on the driver side either unless you go under the subframe.

but then think to yourself if it's worth it in the end lol

churchx · 02-22-2016, 02:15 AM

1) if there are two pipes, individual diameter of each should be lesser, hence ease routing of two?
2) imho it's not THAT hard, after all, Ace header's overpipe somewhat already does that
3) i'd still drop that idea due weight dual pipe design will bring, and extra costs (especially due one-off custom work and due need to design all the exhaust till end of car this way) / complexity. Or do that only with direct side exhausts, where issues of weight and need to make rest of exhaust dual too would be lesser.

humfrz · 02-22-2016, 04:46 AM

Quote:

Originally Posted by ort895

I tried searching but nothing came up. Has anybody ever looked into this? I feel like it would be pretty interesting. Taking some welding classes right now, may look into it myself lol

Well, now, ort895, if you can pull that off ....... I'd say you would deserve an "A+" in your welding class .......

humfrz

ort895 · 02-22-2016, 08:10 AM

Quote:

Originally Posted by humfrz

Well, now, ort895, if you can pull that off ....... I'd say you would deserve an "A+" in your welding class .......

humfrz

lol not just me, got a couple of good people looking for a project.

jarnojvv · 02-22-2016, 08:59 AM

So, as a DIY project this would be pretty cool IMO. Functionally probably not as good, but i would love to see the end result!

churchx · 02-22-2016, 09:58 AM

BTW, imho much easier to route two pipes where overpipe portion is if pipes are not round there, for example D shaped, no?

ort895 · 02-22-2016, 11:16 AM

Quote:

Originally Posted by churchx

BTW, imho much easier to route two pipes where overpipe portion is if pipes are not round there, for example D shaped, no?

That's what i assumed. I wish i retained more from my 3D modeling classes in high school lol

ort895 · 02-22-2016, 11:17 AM

Quote:

Originally Posted by jarnojvv

So, as a DIY project this would be pretty cool IMO. Functionally probably not as good, but i would love to see the end result!

if i do indeed do it its not going to be for "gains" since you dond't really see anything noticeable on n/a cars anyway. Im in it mostly for the sound it could produce and the uniqueness.

Ashikabi · 02-22-2016, 11:33 PM

Run them out the vents in the front fender. Kthxbai

[YOYO] · 02-22-2016, 11:55 PM

Quote:

Originally Posted by Ashikabi

Run them out the vents in the front fender. Kthxbai

To quote Brick Tamland, that'll be good for lots of . . .

02-22-2016, 12:21 AM	#1
ort895 Senior Member Join Date: Aug 2014 Drives: 2013 BRZ Location: North Carolina Posts: 695 Thanks: 195 Thanked 139 Times in 113 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	True dual exhuast I tried searching but nothing came up. Has anybody ever looked into this? I feel like it would be pretty interesting. Taking some welding classes right now, may look into it myself lol __________________ Yeah its an auto, deal with it.

02-22-2016, 12:56 AM	#4
ryoma Senior Member Join Date: Mar 2015 Drives: 2015 Subaru BRZ Limited CWP Location: SoCal Posts: 1,561 Thanks: 34 Thanked 669 Times in 469 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	if you have the time and material to do it, definitely do it if you want to. though, you will most likely run into problems since the stock overpipe is already so tight I doubt you will be able to run another pipe through the same spot. I don't even think there is room on the driver side either unless you go under the subframe. but then think to yourself if it's worth it in the end lol __________________ My 2015 CWP BRZ Build

02-22-2016, 08:59 AM	#8
jarnojvv Senior Member Join Date: Dec 2014 Drives: 86\|Fortuner\|FJ\|Mustang\|SwiftSport Location: RSA Posts: 158 Thanks: 40 Thanked 186 Times in 80 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	So, as a DIY project this would be pretty cool IMO. Functionally probably not as good, but i would love to see the end result! __________________ -JvV-

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02-22-2016, 02:15 AM	#5
churchx Senior Member Join Date: Mar 2015 Drives: 2014 GT86 Location: Latvia, Riga Posts: 4,334 Thanks: 696 Thanked 2,086 Times in 1,436 Posts Mentioned: 53 Post(s) Tagged: 1 Thread(s)	1) if there are two pipes, individual diameter of each should be lesser, hence ease routing of two? 2) imho it's not THAT hard, after all, Ace header's overpipe somewhat already does that 3) i'd still drop that idea due weight dual pipe design will bring, and extra costs (especially due one-off custom work and due need to design all the exhaust till end of car this way) / complexity. Or do that only with direct side exhausts, where issues of weight and need to make rest of exhaust dual too would be lesser.

02-22-2016, 09:58 AM	#9
churchx Senior Member Join Date: Mar 2015 Drives: 2014 GT86 Location: Latvia, Riga Posts: 4,334 Thanks: 696 Thanked 2,086 Times in 1,436 Posts Mentioned: 53 Post(s) Tagged: 1 Thread(s)	BTW, imho much easier to route two pipes where overpipe portion is if pipes are not round there, for example D shaped, no?

02-22-2016, 11:33 PM	#12
Ashikabi Senior Member Join Date: Aug 2014 Drives: 2013 FR-S Location: Northwest Iowa Posts: 7,359 Thanks: 454 Thanked 4,549 Times in 2,950 Posts Mentioned: 59 Post(s) Tagged: 5 Thread(s)	Run them out the vents in the front fender. Kthxbai

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