Why no aluminum??? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

epson1 · 07-30-2012, 03:24 PM

If everyone is so concerned about weight savings why doesn't anyone try making an aluminum catback single exit exhaust? i can only imagine it weighing a couple pounds. I plan on having one custom made to bolt up to the AP headers here in the next month. I think a mass produced version would sell great.

7thgear · 07-30-2012, 03:25 PM

because metallurgy

Dave-ROR · 07-30-2012, 03:27 PM

Quote:

Originally Posted by epson1

If everyone is so concerned about weight savings why doesn't anyone try making an aluminum catback single exit exhaust? i can only imagine it weighing a couple pounds. I plan on having one custom made to bolt up to the AP headers here in the next month. I think a mass produced version would sell great.

Here you go: http://www.lmgtfy.com/?q=why+isn%27t...d+for+exhausts

CBR600RR · 07-30-2012, 03:29 PM

Aluminum is not that easy to weld.

epson1 · 07-30-2012, 03:33 PM

aluminum is very easy to weld and I've used it for exhaust before. someone should probably tell STM or Full-race they're wrong for using aluminum exhausts on their 9 sec+ race cars then....

Dave-ROR · 07-30-2012, 03:37 PM

Quote:

Originally Posted by epson1

aluminum is very easy to weld and I've used it for exhaust before. someone should probably tell STM or Full-race they're wrong for using aluminum exhausts on their 9 sec+ race cars then....

Closed before this goes downhill, but did you read anything from the link I posted?

Using Aluminum on a race car doesn't mean anything. It will get brittle very quickly and it will break, that doesn't matter on a race car, it matters on a street car.

Dave-ROR · 07-30-2012, 03:44 PM

Decided to re-open, but will shut it down again if it goes too far.

Nazarite · 07-30-2012, 03:49 PM

In before thread is closed and re-opened again.

thermobox · 07-30-2012, 04:09 PM

If you are concerned with weight savings in your exhaust system, you will want to wait for titanium systems to become available.

My GD Magnaflow Ti catback could be held up by one pinky finger.

HunterGreene · 07-30-2012, 04:18 PM

epson,

Yes, AL exhausts are used in racing cars, that are under different situations than your everday DD.

Long story short--stainless steel strikes the best compromise between wear and weight. Aluminum is light, but would be worn out (for various reasons) after a relatively short time.

SkullWorks · 07-30-2012, 05:07 PM

Ask Geoff from full race how well that exhaust worked out for him when his s14 w/R32 conversion caught fire because it blew a hole in the exhaust due to the ductability of Al at those temps

to the OP:

For future reference when asking why not, consider answers, consider source, before making yourself seem...over extended in your knowledge base

Dave-ROR · 07-30-2012, 05:14 PM

Quote:

Originally Posted by SkullWorks

Ask Geoff from full race how well that exhaust worked out for him when his s14 w/R32 conversion caught fire because it blew a hole in the exhaust due to the ductability of Al at those temps

to the OP:

For future reference when asking why not, consider answers, consider source, before making yourself seem...over extended in your knowledge base

I wasn't going to mention the fire :P

SkullWorks · 07-30-2012, 05:27 PM

Quote:

Originally Posted by Dave-ROR

I wasn't going to mention the fire :P

My bad

xwd · 07-30-2012, 05:37 PM

There are a couple of Ti catbacks out from the JDM companies but they are super expensive. Freed Engineering is/was working on a single exit catback which weighs in the neighborhood of 10lbs.

I wish Magnaflow would make a single exist Ti catback for this car (I had a GD one as well) but I think they got out of making them a long time ago. I still have mine I was going to see if there was some way I could shorten it to make it work on the BRZ.

07-30-2012, 03:24 PM	#1
epson1 Banned Join Date: Jul 2012 Drives: 2013 BRZ Limited Location: Sioux Falls SD Posts: 98 Thanks: 1 Thanked 69 Times in 34 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Why no aluminum??? If everyone is so concerned about weight savings why doesn't anyone try making an aluminum catback single exit exhaust? i can only imagine it weighing a couple pounds. I plan on having one custom made to bolt up to the AP headers here in the next month. I think a mass produced version would sell great.

07-30-2012, 03:25 PM	#2
7thgear i'm sorry, what? Join Date: Jan 2012 Drives: Canada Location: I rock a beat harder than you can beat it with rocks Posts: 4,399 Thanks: 357 Thanked 2,508 Times in 1,268 Posts Mentioned: 40 Post(s) Tagged: 3 Thread(s)	because metallurgy __________________ don't you think if I was wrong, I'd know it?

07-30-2012, 03:44 PM	#7
Dave-ROR Site Moderator Join Date: Dec 2010 Drives: Stuff Location: Florida Posts: 10,317 Thanks: 955 Thanked 5,965 Times in 2,689 Posts Mentioned: 262 Post(s) Tagged: 8 Thread(s)	Decided to re-open, but will shut it down again if it goes too far. __________________ -Dave Track cars: 2013 Scion FRS, 1998 Acura Integra Type-R, 1993 Honda Civic Hatchback DD: 2005 Acura TSX Tow: 2022 F-450 Toys: 2001 Chevrolet Corvette Z06, 1993 Toyota MR2 Turbo, 1994 Toyota MR2 Turbo, 1991 Mitsubishi Galant VR-4 Parts: 2015 Subaru BRZ Limited, 2005 Acura TSX Projects: 2013 Subaru BRZ Limited track car build FS: 2004 GMC Sierra 2500 LT CCSB 8.1/Allison with 99k miles

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
BRZ STI front under spoiler and 17" aluminum wheels released in Japan	yajin	BRZ First-Gen (2012+) — General Topics	99	05-31-2012 07:09 PM
Steel Vs Aluminum in the FT86	blur	Scion FR-S / Toyota 86 GT86 General Forum	72	06-08-2011 04:35 AM

07-30-2012, 03:29 PM	#4
CBR600RR Senior Member Join Date: Jul 2012 Drives: Raven Black Location: Ottawa, Canada Posts: 1,343 Thanks: 451 Thanked 563 Times in 276 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	Aluminum is not that easy to weld.

07-30-2012, 03:33 PM	#5
epson1 Banned Join Date: Jul 2012 Drives: 2013 BRZ Limited Location: Sioux Falls SD Posts: 98 Thanks: 1 Thanked 69 Times in 34 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	aluminum is very easy to weld and I've used it for exhaust before. someone should probably tell STM or Full-race they're wrong for using aluminum exhausts on their 9 sec+ race cars then....

07-30-2012, 03:49 PM	#8
Nazarite 0 RWHP Join Date: Jun 2012 Drives: 2008 Mazdaspeed 3 Location: Alpharetta, GA Posts: 139 Thanks: 45 Thanked 44 Times in 32 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	In before thread is closed and re-opened again.

07-30-2012, 04:09 PM	#9
thermobox Senior Member Join Date: Feb 2012 Drives: 16 Impreza 5dr CWP Location: Baltimore, Md Posts: 332 Thanks: 5 Thanked 94 Times in 61 Posts Mentioned: 11 Post(s) Tagged: 0 Thread(s)	If you are concerned with weight savings in your exhaust system, you will want to wait for titanium systems to become available. My GD Magnaflow Ti catback could be held up by one pinky finger.

07-30-2012, 04:18 PM	#10
HunterGreene Hail Magnet Join Date: Jun 2012 Drives: Firestorm FR-S: "Artemis" Location: Cleveland, OH Posts: 4,578 Thanks: 3,386 Thanked 3,195 Times in 1,633 Posts Mentioned: 43 Post(s) Tagged: 2 Thread(s)	epson, Yes, AL exhausts are used in racing cars, that are under different situations than your everday DD. Long story short--stainless steel strikes the best compromise between wear and weight. Aluminum is light, but would be worn out (for various reasons) after a relatively short time.

07-30-2012, 05:07 PM	#11
SkullWorks Banned Join Date: Mar 2012 Drives: SSM LT MT BRZ Location: SoCal Posts: 1,033 Thanks: 803 Thanked 754 Times in 328 Posts Mentioned: 23 Post(s) Tagged: 1 Thread(s)	Ask Geoff from full race how well that exhaust worked out for him when his s14 w/R32 conversion caught fire because it blew a hole in the exhaust due to the ductability of Al at those temps to the OP: For future reference when asking why not, consider answers, consider source, before making yourself seem...over extended in your knowledge base

07-30-2012, 05:37 PM	#14
xwd Senior Member Join Date: Feb 2012 Drives: 2013 DGM Subaru BRZ (Subie #9) Location: ATL, US Posts: 2,667 Thanks: 123 Thanked 861 Times in 552 Posts Mentioned: 32 Post(s) Tagged: 0 Thread(s)	There are a couple of Ti catbacks out from the JDM companies but they are super expensive. Freed Engineering is/was working on a single exit catback which weighs in the neighborhood of 10lbs. I wish Magnaflow would make a single exist Ti catback for this car (I had a GD one as well) but I think they got out of making them a long time ago. I still have mine I was going to see if there was some way I could shorten it to make it work on the BRZ.

User Name		Remember Me?
Password