Nameless Performance BRZ Axleback Exhaust - Page 7 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

SemperFi · 07-26-2012, 12:21 PM

http://www.ft86club.com/forums/showthread.php?t=12412
Its a group buy happening on the Axel back, if anyone is interested.

Lasse · 07-26-2012, 03:48 PM

Quote:

Originally Posted by MSTiFK8R

no, he's not ))))

you are mixing up Loudness and Power terms

we're talking loudness

http://www.gcaudio.com/resources/how...eloudness.html
http://community.discovery.com/eve/f...8/m/9511927169

Thanks.

mike2100 · 07-26-2012, 09:52 PM

Quote:

Originally Posted by MSTiFK8R

no, man

would you pls recheck that

+10dB = x2 louder

Whoops you are right. I was thinking power terms. I really dislike the science dealing with this stuff :P

NOBROWS · 07-30-2012, 09:10 PM

got mine today love the sound ! not to loud ! amazing fit, quality product !

MSTiFK8R · 07-31-2012, 03:30 AM

I still can't get the reason why keeping the pipes so long

Jason@Nameless, is that for higher gas velocity, or any scientific reason for that instead of the shorter Y-story as Greddy or SRT for example?

OrbitalEllipses · 07-31-2012, 12:54 PM

Quote:

Originally Posted by MSTiFK8R

I still can't get the reason why keeping the pipes so long

Jason@Nameless, is that for higher gas velocity, or any scientific reason for that instead of the shorter Y-story as Greddy or SRT for example?

I asked that question in one of the threads; there's a scientific reason for it.

xjohnx · 07-31-2012, 12:55 PM

Quote:

Originally Posted by OrbitalEllipses

I asked that question in one of the threads; there's a scientific reason for it.

Because racecar?

OrbitalEllipses · 07-31-2012, 12:56 PM

Quote:

Originally Posted by xjohnx

Because racecar?

No.

Calum · 07-31-2012, 12:56 PM

I asked this as well, between the bends and the length it looks like it would be more restrictive. I was assured that zero gains were seen with the typical design over this one. More over, due to the lack of loading on one side vs the other, there may be some gains to this design as well as less drone from what I understand. Hopefully Jason will comment further.

Tainen · 07-31-2012, 12:57 PM

I think they wanted to keep the pipe length equal so there is equal distribution to both sides of the axleback. In order to do the split design, they would have needed to do a full catback design (which you can see they made a prototype of it in the nameless vs AP thread in one of their pictures) and it made no extra power. So they just stuck with the axleback, with equal length routing. I noticed several other axlebacks are not routed correctly to equally distribute exhaust gas. Just an efficiency thing, I guess.

also on the dyno, their axleback had the same power figures as their axleback delete. So they know there is zero restriction in the system.

Jason@Nameless · 07-31-2012, 01:02 PM

Yeah three reasons: Equal distribution to both sides is critical for proper sound and avoiding that 'one side gets all the flow'. Also, when dyno'd back to back with a single, non muffled 2.5" straight pipe there was negligible difference between the two with the dual exit biasing torque and not losing any horsepower. Finally, our pipe diameter choice on the secondary circuit is to match the flow of the single 2.5" and minimize drone. The larger that circuit gets, the worse the drone is, from our testing.

There's more going on in that exhaust also, but this is the long and the short of our reasoning of the design.

Jason

Nate219BRZ · 08-06-2012, 06:03 PM

What would a resonator delete do for sound of this system? Have you guys tested that?

trueno86power · 08-07-2012, 05:23 PM

@Nameless

Last week I've installed my axle back and so far I'm in love with the sound! This week I'll install the high flow cat section.

clevrname · 08-08-2012, 03:17 PM

I ordered the axleback yesterday, what have you guys noticed for turnaround time?

07-26-2012, 12:21 PM	#85
SemperFi Member Join Date: Jun 2012 Drives: Its a scion....FRS Location: San Jose Posts: 70 Thanks: 3 Thanked 30 Times in 17 Posts Mentioned: 3 Post(s)	http://www.ft86club.com/forums/showthread.php?t=12412 Its a group buy happening on the Axel back, if anyone is interested. __________________ Born to fight, Trained to kill, Ready to Die, But I never will. Semper Fi. 93 Integra GSR (Sold), 2007 Toyota Fj Cruiser (Sold), 2007 Aston Martin V8 Vantage, 2008 VW R32 (Sold), 2013 Toyota FR-S

07-30-2012, 09:10 PM	#88
NOBROWS Member Join Date: Jun 2012 Drives: 2013 FIRESTORM FRS Location: ALABAMA Posts: 36 Thanks: 1 Thanked 10 Times in 6 Posts Mentioned: 0 Post(s)	got mine today love the sound ! not to loud ! amazing fit, quality product ! __________________ 2013 Firestorm Red FR-S 1993 Honda civic track car Motivate 2 Hate Motorsports

07-31-2012, 12:57 PM	#94
Tainen Senior Member Join Date: Nov 2011 Drives: First SWP BRZ-L Location: Washington Posts: 809 Thanks: 154 Thanked 350 Times in 174 Posts Mentioned: 11 Post(s)	I think they wanted to keep the pipe length equal so there is equal distribution to both sides of the axleback. In order to do the split design, they would have needed to do a full catback design (which you can see they made a prototype of it in the nameless vs AP thread in one of their pictures) and it made no extra power. So they just stuck with the axleback, with equal length routing. I noticed several other axlebacks are not routed correctly to equally distribute exhaust gas. Just an efficiency thing, I guess. also on the dyno, their axleback had the same power figures as their axleback delete. So they know there is zero restriction in the system. __________________ First white BRZ in the country Limited SWP BRZ, 35% tint, clear bra, Nameless Performance downpipe, axelback, headers

08-07-2012, 05:23 PM	#97
trueno86power [\|\|•]=(86)=[•\|\|] Join Date: Jan 2010 Drives: 2017 Toyota 86 Location: Quebec Posts: 963 Thanks: 173 Thanked 489 Times in 218 Posts Mentioned: 9 Post(s)	@Nameless Last week I've installed my axle back and so far I'm in love with the sound! This week I'll install the high flow cat section. __________________ trueno86power GR \| TOM'S \| TRD 2017 Toyota 86

08-08-2012, 03:17 PM	#98
clevrname Senior Member Join Date: Aug 2011 Drives: 2013 Firestorm FR-S 6MT Location: Virginia Beach, VA Posts: 289 Thanks: 12 Thanked 92 Times in 46 Posts Mentioned: 0 Post(s)	I ordered the axleback yesterday, what have you guys noticed for turnaround time? __________________ 2013 Firestorm 6MT 2005 Corolla XRS

07-31-2012, 03:30 AM	#89
MSTiFK8R Senior Member Join Date: Jul 2012 Drives: BRZ WRB Location: Country of Bears Posts: 336 Thanks: 257 Thanked 264 Times in 82 Posts Mentioned: 3 Post(s)	I still can't get the reason why keeping the pipes so long Jason@Nameless, is that for higher gas velocity, or any scientific reason for that instead of the shorter Y-story as Greddy or SRT for example?

07-31-2012, 12:56 PM	#93
Calum That Guy Join Date: Dec 2011 Drives: 2013 asphalt FRS MT Location: Halifax, Nova Scotia Posts: 4,865 Thanks: 5,058 Thanked 2,868 Times in 1,499 Posts Mentioned: 82 Post(s)	I asked this as well, between the bends and the length it looks like it would be more restrictive. I was assured that zero gains were seen with the typical design over this one. More over, due to the lack of loading on one side vs the other, there may be some gains to this design as well as less drone from what I understand. Hopefully Jason will comment further.

07-31-2012, 01:02 PM	#95
Jason@Nameless Senior Member Join Date: Jun 2012 Drives: '88 BMW 535is Turbo Location: La Center, WA Posts: 287 Thanks: 119 Thanked 822 Times in 156 Posts Mentioned: 52 Post(s)	Yeah three reasons: Equal distribution to both sides is critical for proper sound and avoiding that 'one side gets all the flow'. Also, when dyno'd back to back with a single, non muffled 2.5" straight pipe there was negligible difference between the two with the dual exit biasing torque and not losing any horsepower. Finally, our pipe diameter choice on the secondary circuit is to match the flow of the single 2.5" and minimize drone. The larger that circuit gets, the worse the drone is, from our testing. There's more going on in that exhaust also, but this is the long and the short of our reasoning of the design. Jason

08-06-2012, 06:03 PM	#96
Nate219BRZ Senior Member Join Date: Mar 2012 Drives: Rip 04 golf gti rip 05 scion TC Location: NWI Posts: 230 Thanks: 68 Thanked 65 Times in 25 Posts Mentioned: 1 Post(s)	What would a resonator delete do for sound of this system? Have you guys tested that?

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