Exhaust Question - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 5 Old 03-06-2009, 01:04 PM Thread Starter
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Exhaust Question

I know this has probably been asked a million times but......


I have a 331 stroker with a 61mm turbo kit. 3" downpipe into a 2.5 y-pipe

I would like my car to be fairly quiet. My city now has a noise ordinance.

What would be some good flowing mufflers that will make good power and keep the noise to a minimum? i will need two since i have a y-pipe, and i will need to run dumps, no tailpipes. (im going to install an anti-roll)

Somewhat cheap too!
thanks.

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post #2 of 5 Old 03-06-2009, 03:03 PM
 
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Borla Pro XS ftw! My car just made 905rwhp through 3" true dual exhaust with Borla Pro XS's. Picked them up for around $70 each through wickednicky.com Here is a link to mine on the dyno, they arent as loud as they sound in the bay. These runs weren't the 905 pulls.

http://www.youtube.com/watch?v=kor4Mk_CZ_Y

Anthony

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post #3 of 5 Old 03-06-2009, 04:30 PM
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Magnuflows are some of the quietest mufflers around and make great HP.

I had the regular Borlas and wouldn't recommend them to anyone. They use the same muffler for all the different size pipes but just weld on the correct pipe on the outside. The inside of the muffler is only 2 1/4". I wanted 3" ones and seen that and called up Borla. Than of course I sent them back.
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post #4 of 5 Old 03-06-2009, 05:35 PM
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My buddy has Dynomax Ultraflo mufflers on his car..makes around 640+RWHP on pump gas- low boost, T76 332ci F303 cam , 94 GT... car is very quiet at idle and cruising...gets pretty loud when you get on it..


Dumps might be ok, best to run tailpipes...you CAN get the rear anti-roll bar kits that clear tail pipes...Check this thread:
https://forums.corral.net/forums/showthread.php?t=919829

Last edited by 2dxtrm; 03-06-2009 at 05:40 PM.
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post #5 of 5 Old 03-06-2009, 11:06 PM
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Quote:
The results in HP order:
1.Flowtech Warlock (open) 374.2 hp/ 333.1 tq
2.Bassani Real Street 373.7 hp/ 333.8 tq
3.Hooker Maxflow 373.5 hp/ 333 tq
4.Borla XS 373.3 hp/ 332.6 tq
5.Magnaflow 372.8 / 332.5 tq
6.MAC 372.3 hp / 331.5 tq
7.Flowtech Afterburner 372.3 hp/ 330.1 tq
8.Hooker Aerochamber 372.1 hp/ 330.4 tq
9.Bassani 372 hp/ 333.5 tq
10.Spintech 371.6 hp/ 332.2 tq
11.Edelbrock Performer RPM 370.9 hp / 331.3 tq
12.Borla XR1 370 hp/ 334 tq
13.Flowtech Terminator 369.5 hp / 331.3 tq
14.Dynomax Ultra Flo 369.4 / 333.2 tq
15.Flowmaster 369.4 hp / 331.8 tq
16.Flowtech Warlock 366.3 hp / 325.3 tq
17.No muffs 365.2 hp / 330.1 tq

Sound Off in Quietest to Loudest (Decibels):
1.Borla XS, 80db at idle, 90db at 2,000 rpm, 110db at WOT.
2.Hooker Maxflow, 80db at idle, 90db at 2,000 rpm, 120db at WOT.
3.Magnaflow, 82db at idle, 91 at 2,000 rpm, 114db at WOT.
4.Flowmaster, 82db at idle, 93 at 2,000 rpm, 115db at WOT.
5.Flowtech Warlock, 83db at idle, 92 at 2,000 rpm, 112db at WOT.
6.Dynomax UltraFlo, 83db at idle, 94 at 2,000 rpm, 113db at WOT.
7.Borla XR1, 83db at idle, 96db at 2,000 rpm, 118db at WOT.
8.Bassani Street, 83db at idle, 96db at 2,000 rpm, 120db at WOT.
9.Edelbrock RPM, 84db at idle, 93db at 2,000 rpm, 118db at WOT.
10.Bassani Real Street, 84db at idle, 96db at 2,000 rpm, MAX. (120+db).
11.Flowtech Afterburner, 86db at idle, 94db at 2,000 rpm, 115db at WOT.
12.Flowtech Terminator, 86db at idle, 94db at 2,000 rpm, 119db at WOT.
13.Hooker Aerochamber, 87db at idle, 94db at 2,000 rpm, 114db at WOT.
14.SpinTech, 87db at idle, 97db at 2,000 rpm, 116db at WOT.
15.MAC, 87db at idle, 98db at 2,000 rpm, 119db at WOT.
16.No Muffler, 91db at idle, 103db at 2,000 rpm, MAX. (120+db).
I run a single max flow dumped. Its not loud, but its not silent either.

http://www.youtube.com/watch?v=trnDK91NFww bad video of it
http://smg.photobucket.com/albums/v2...1371092660.flv

1994 Turbo GT

Last edited by mustangless; 03-06-2009 at 11:11 PM.
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