05-17-2018, 10:01 PM
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#1
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Registered User
Join Date: Feb 2017
Location: CO
Posts: 989
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Has anybody, or is anybody running this exhaust?
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05-17-2018, 11:28 PM
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#2
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Registered User
Join Date: Mar 2016
Location: Spain
Posts: 985
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I am not running one, but read a couple of post stating it had some drone. Maybe someone can confirm or deny.
__________________
2000 Boxster S Ocean Blue Metalic
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05-18-2018, 12:52 AM
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#3
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Registered User
Join Date: Feb 2017
Location: North Eastern US
Posts: 646
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Quote:
Originally Posted by Geof3
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I just removed a Borla system from my 2004 3.2 6 spd (installed by the PO). For my ears, very heavy drone from ~2,500 to 3,000 rpm as installed on my car.
My Borla was very well made, relatively light weight, bolted up perfectly and sounded great. I just could not live with the drone. I was running it with the secondary cats in place. I replaced it with a FVD Brombacher Sound Version and am very happy now.
I did toy with the idea of adding a balance pipe between the outlets of the Borla mufflers to try and tame the drone but never got around to it.
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Rgds, Fred
#317 550 Spyder Anniversary Edition 2004 Boxster S, 3.8L Flat Six Innovations engine, PSS9s, etc, etc . . .
The contents of my posts are for entertainment only. As confirmed by my many motor sports fails, I am not qualified to give product endorsements or mechanical advice
Last edited by Oldcarguy; 05-18-2018 at 03:15 AM.
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05-18-2018, 02:04 AM
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#4
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Custom User Title Here
Join Date: Mar 2012
Location: Ft. Leonard Wood
Posts: 6,163
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Any two can exhaust is going to drone without a crossover pipe.
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05-18-2018, 04:37 AM
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#5
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Registered User
Join Date: Dec 2013
Location: Dahlonega , Georgia
Posts: 1,348
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I have a GHL two can muffler on the beast many folks say the GHL is the king of drone and this one did drone . But the overall sound was and is glorious . So I purchased some Car Chemistry baffle inserts along with their exhaust steel wool . I don't remember the exact dimensions any more but in one tip I installed a 6 " long baffle and in the other tip an 8 " long baffle ( roughly ) . The idea is to alternate the sound waves so they help cancel each out . Both baffles were wrapped with the steel wool . Each is held in place with one rivet . I can honestly say this has eliminated 95 % + of the drone across the RPM range . My exhaust is now very easy to live with and still has that fantastic sound at higher revs . And on Jakes dyno we made 280 hp at the wheels so it seems to flow just fine .
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2002 Boxster S Arctic Silver with black top with glass window and black leather interior. Jake Raby 3.6 SS ( the beast ) with IMS Solution. 996 GT3 front bumper , GT3 rocker covers and GT3TEK rear diffuser and Joe Toth composites rear ducktail spoiler .
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05-18-2018, 03:29 PM
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#6
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Registered User
Join Date: Feb 2017
Location: CO
Posts: 989
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Quote:
Originally Posted by Oldcarguy
I just removed a Borla system from my 2004 3.2 6 spd (installed by the PO). For my ears, very heavy drone from ~2,500 to 3,000 rpm as installed on my car.
My Borla was very well made, relatively light weight, bolted up perfectly and sounded great. I just could not live with the drone. I was running it with the secondary cats in place. I replaced it with a FVD Brombacher Sound Version and am very happy now.
I did toy with the idea of adding a balance pipe between the outlets of the Borla mufflers to try and tame the drone but never got around to it.
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Ah yes, could't remember if yours was a Borla. Too bad. They do look nice! I'll just wait for a bit for an FVD!
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05-18-2018, 03:30 PM
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#7
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Registered User
Join Date: Feb 2017
Location: CO
Posts: 989
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Quote:
Originally Posted by particlewave
Any two can exhaust is going to drone without a crossover pipe.
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PW, what does the crossover pipe do that prevents the drone?
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05-18-2018, 10:17 PM
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#8
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Custom User Title Here
Join Date: Mar 2012
Location: Ft. Leonard Wood
Posts: 6,163
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Quote:
Originally Posted by Geof3
PW, what does the crossover pipe do that prevents the drone?
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It allows the opposing sound waves to interfere and partially cancel each other out.
When done right, the crossover can eliminate most drone without affecting the overall sound of the exhaust.
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Last edited by particlewave; 05-18-2018 at 10:22 PM.
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05-19-2018, 11:19 PM
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#9
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Registered User
Join Date: Feb 2017
Location: CO
Posts: 989
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Quote:
Originally Posted by particlewave
It allows the opposing sound waves to interfere and partially cancel each other out.
When done right, the crossover can eliminate most drone without affecting the overall sound of the exhaust.
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Cool, thanks!
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