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Old 05-24-2010, 11:27 AM   #1
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Default Thinking about a Borla XR1

Current setup is FM 2.5" downpipe mated to a 3" exhaust with an 18" resonator and an ebay canister.

After listening to some mt exhaust videos, I'm thinking I can get a better quality note out of my exhaust. Idle sounds great, deceleration sounds great, and wot sounds great...but there are a few areas in the exhaust that sound too..."honda-ish" for my liking. I was thinking about pulling the canister and sticking in an XR1 with just a tip on it.

It's not that the exhaust is loud, I just wish it was more mellow sounding is some rpms. Any idea if this would be a waste of time or if there are better options? Also, I don't want to shove the largest straight through muffler posible I can in there...been there and done that, it sounded like ***.
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Old 05-24-2010, 11:38 AM   #2
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this is the muffler I'm installing on June 5th.
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Old 05-24-2010, 12:23 PM   #3
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this is the muffler y8s is installing for me on June 5th.
qft?
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Old 05-24-2010, 12:34 PM   #4
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I'll probably be getting one of these:

http://www.burnsstainless.com/sm-250-350-17.aspx

17" long and weighing under 2.5 lbs... it's like yes.
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Old 05-24-2010, 12:37 PM   #5
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Originally Posted by Pusha View Post
I'll probably be getting one of these:

http://www.burnsstainless.com/sm-250-350-17.aspx

17" long and weighing under 2.5 lbs... it's like yes.
I thought my muffler was expensive. ****.
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Old 05-24-2010, 12:40 PM   #6
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17" long and weighing under 2.5 lbs... it's like pointless and expensive.
qtf?
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Old 05-24-2010, 12:42 PM   #7
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Quote:
Originally Posted by Turbo_4 View Post
Current setup is FM 2.5" downpipe mated to a 3" exhaust with an 18" resonator and an ebay canister.

After listening to some mt exhaust videos, I'm thinking I can get a better quality note out of my exhaust. Idle sounds great, deceleration sounds great, and wot sounds great...but there are a few areas in the exhaust that sound too..."honda-ish" for my liking. I was thinking about pulling the canister and sticking in an XR1 with just a tip on it.

It's not that the exhaust is loud, I just wish it was more mellow sounding is some rpms. Any idea if this would be a waste of time or if there are better options? Also, I don't want to shove the largest straight through muffler posible I can in there...been there and done that, it sounded like ***.
At the end of the day, a perf-tube muffler is a perf-tube muffler, the character of the exhaust isn't going to change all that much. If you are having resonance problems at certain RPMs, I would experiment with adding in an additional resonator to smooth it out before you run out and blow a bunch of cash on another muffler.

Last edited by Jeff_Ciesielski; 05-24-2010 at 12:42 PM. Reason: grammar
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Old 05-24-2010, 12:42 PM   #8
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Originally Posted by Jeff_Ciesielski View Post
I thought my muffler was expensive. ****.
Well, I'll be using the money from selling my HKS Carbon Ti muffler (11 lbs.) for the purchase.

https://www.miataturbo.net/engine-performance-56/hks-carbon-ti-exhaust-muffler-44702/
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Old 05-24-2010, 12:50 PM   #9
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Originally Posted by Jeff_Ciesielski View Post
At the end of the day, a perf-tube muffler is a perf-tube muffler, the character of the exhaust isn't going to change all that much. If you are having resonance problems at certain RPMs, I would experiment with adding in an additional resonator to smooth it out before you run out and blow a bunch of cash on another muffler.
I agree. I went from a FM 2.25 dp into their 2.5" cat/duel exhaust to a full 3" The sound is slightly more mellow, but not as drastic as I thought it would be. The biggest drop in noise comes at cruise (which is what I was hoping) I also agree that you should look into adding a resonator. I will also do this if my wife thinks the car is too loud.

Does anyone have a sound clip of before and after adding a resonator before the muffler?
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Old 05-24-2010, 01:13 PM   #10
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Quote:
Originally Posted by Pusha View Post
I'll probably be getting one of these:

http://www.burnsstainless.com/sm-250-350-17.aspx

17" long and weighing under 2.5 lbs... it's like yes.
exactly what is your goal?

cuz a dynomax bullet race muffler is about $60 and probably very similar performance-wise.
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Old 05-24-2010, 01:14 PM   #11
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I added one, it barely made a difference. cut out some drone.

the key to win is what I posted.

I mean, look how well it works:

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Old 05-24-2010, 01:17 PM   #12
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Originally Posted by y8s View Post
exactly what is your goal?

cuz a dynomax bullet race muffler is about $60 and probably very similar performance-wise.
Well, my car is a track car that will see light street use. How loud are turbocharged Miatas w/ open downpipes?
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Old 05-24-2010, 01:25 PM   #13
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i've had mine with basically open downpipe that exits just behind where i sit, and after three months of dd its getting a little annoying and ill be putting on a muffler soon. Because im A) scared that i will get pulled over because of the loudness which will lead to them looking under my hood and having to take everything off, and B) its pretty loud
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Old 05-24-2010, 01:28 PM   #14
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Originally Posted by wittyworks View Post
i've had mine with basically open downpipe that exits just behind where i sit, and after three months of dd its getting a little annoying and ill be putting on a muffler soon. Because im A) scared that i will get pulled over because of the loudness which will lead to them looking under my hood and having to take everything off, and B) its pretty loud
Yeah... I know what you mean in regard to the annoyance factor and po-po. I drove around in my S4 with open downpipes for about a week. Popping, gurgling and shooting flames got the attention of LEOs pretty damn quick.
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Old 05-24-2010, 01:37 PM   #15
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I currently having a 4x9x14 muffler, 4x12" resonator, and 3" metal core cat, and it's perfectly loud for a race car.
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Old 05-24-2010, 01:54 PM   #16
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Originally Posted by Braineack View Post
I added one, it barely made a difference. cut out some drone.

the key to win is what I posted.

I mean, look how well it works:

I wouldn't expect it to make a lot of difference in the volume, but the OP's complaint was "sounding too much like a honda" which I take as meaning lots of rasp/drone.

I'm sure the big ZOMFG muffler that you'll be running will be very mellow at cruise and even at WOT, but I bet if you ran it sans resonator/cat you would still get that farting BLAT sound in the midrange.
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Old 05-24-2010, 02:02 PM   #17
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I'm not sure if I have room for another resonator unless I redid the whole exhaust. It current has a fake cat right underneath where the seats are and an 18" resonator right before the trunk. I might be able to squeeze another small resonator underneath the trunk area...just depends.

It doesn't "rasp" like a honda does...it just sometimes has that plain, jane drone sound to it...rather than having any character to it...if that makes sense.
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Old 05-24-2010, 02:07 PM   #18
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1:00, that's the noise I cannot stand, it's LOUD when the wastegate opens.

the dreaded honda WWWWWWWWHHHHHHHHHHHHAAAAAAAAAAAAAAAAAAAAAAA
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Old 05-24-2010, 02:29 PM   #19
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It doesn't "rasp" like a honda does...it just sometimes has that plain, jane drone sound to it...rather than having any character to it...if that makes sense.
That makes perfect sense, and it is exactly why I decided to give an aero-turbine a shot to add some. Cars that have exhaust note 'character' tend to not use strait through perf-tube mufflers, they use a chambered muffler of some sort with resonators to 'shape' the sound. Packed perf-tube mufflers create a very mellow sound, but when our cylinder heads and exhaust camshafts already create a very smooth tone,and IMO it leads to the somewhat flat sound that every miata has.
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Old 05-24-2010, 06:01 PM   #20
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Borla's are quieter than Magnaflows, but not as robust. It shouldn't be an issue on your car.
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