Custom exhaust advice

infernosg · 05-29-2013, 08:23 PM

Extra points to anyone with the Defined Autoworks exhaust manifold.

Trying to figure out the best way to build a single exit exhaust that maximizes performance but keeps sound intensity below 92 dB so I don't get black flagged. With the Defined header I've probably got space for two suppression devices with a single exit. Logan recommends Borla XR-1 mufflers but would two of those in series be enough? What about a Racing Beat presilencer into one of their mufflers? Two Racing Beat mufflers in series? XR-1 into Racing Beat muffler? Other ideas? Not really wanting to run a dual setup.

***TitaniumTT*** · 05-30-2013, 08:25 AM

Fuck borla... I hate those fucking pieces of shit. Better quality of stainless yes, but they just simply do not last.

diabolical1 · 06-14-2013, 10:26 AM

^ so then what do you use/recommend?

infernosg · 06-14-2013, 09:30 PM

Been looking into Burn's Stainless mufflers recently after rereading an article in GRM. They seem to think two of their mufflers in series would be sufficient. I couldn't find a whole lot of info on tbem witb rotaries though.

RICE RACING · 06-14-2013, 11:18 PM

Quote:

Originally Posted by diabolical1

^ so then what do you use/recommend?

SMB

The best hands down, only proven on rotaries in endurance racing, used on the Factory SP racing cars, they are the best !

diabolical1 · 06-15-2013, 10:10 AM

http://www.smb.net.au/

the universal ones seem to be priced roughly around where the XR-1s are. so thanks, Rice.

i don't know what shipping from Australia will be since I've never done that before, but i will keep them as an option since i really only want to do my exhaust once and be done with it.

i will look into gathering more info on XR-1 failures/reliability because so far, aside from a few people saying they thought they were a bit too loud, this is the first time I've heard of anyone saying they're garbage.

http://www.burnsstainless.com/ultra-lightmufflers.aspx

i remember looking at Burns Stainless mufflers maybe two or three years ago and to be honest, the prices scared me. it hasn't changed.

infernosg · 06-25-2013, 07:57 AM

Quote:

Originally Posted by RICE RACING

SMB

The best hands down, only proven on rotaries in endurance racing, used on the Factory SP racing cars, they are the best !

Checked out their website. Nice units but not repackable. What arrangement would you recommend for a high-spinning n/a motor? Two mufflers? Resonator/muffler combo? Something else? I only have space for two sound suppressing devices.

rotar bones · 07-04-2013, 07:29 PM

Has any one ever re-packed one?.

05-29-2013, 08:23 PM	#1
infernosg IT'S ALIVE! Join Date: Dec 2009 Location: Richmond, VA iTrader: (5) Posts: 811 Rep Power: 15	Custom exhaust advice Extra points to anyone with the Defined Autoworks exhaust manifold. Trying to figure out the best way to build a single exit exhaust that maximizes performance but keeps sound intensity below 92 dB so I don't get black flagged. With the Defined header I've probably got space for two suppression devices with a single exit. Logan recommends Borla XR-1 mufflers but would two of those in series be enough? What about a Racing Beat presilencer into one of their mufflers? Two Racing Beat mufflers in series? XR-1 into Racing Beat muffler? Other ideas? Not really wanting to run a dual setup. __________________ '86 Mazda RX-7 Base '79 Mazda RX-7 GS

05-30-2013, 08:25 AM	#2
*TitaniumTT* Test Whore - Admin Join Date: Mar 2008 Location: Right Behind you son iTrader: (4) Posts: 4,581 Rep Power: 10	Fuck borla... I hate those fucking pieces of shit. Better quality of stainless yes, but they just simply do not last. __________________ -The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. *-Angry Motherfcker Mode ENGAGED-**

06-14-2013, 09:30 PM	#4
infernosg IT'S ALIVE! Join Date: Dec 2009 Location: Richmond, VA iTrader: (5) Posts: 811 Rep Power: 15	Been looking into Burn's Stainless mufflers recently after rereading an article in GRM. They seem to think two of their mufflers in series would be sufficient. I couldn't find a whole lot of info on tbem witb rotaries though. __________________ '86 Mazda RX-7 Base '79 Mazda RX-7 GS

07-04-2013, 07:29 PM	#8
rotar bones rotary owner/driver. Join Date: Jun 2013 iTrader: (0) Posts: 69 Rep Power: 0	Has any one ever re-packed one?.