Retrofitted a Mazdaspeed3 Muffler on Naturally Aspirated NA - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Media Got any pics or vids to share?

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 05-18-2014, 10:51 PM   #1
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Oct 2009
Posts: 1,436
Total Cats: 58
Default Retrofitted a Mazdaspeed3 Muffler on Naturally Aspirated NA

I've had a spare 1st gen Mazdaspeed3 muffler sitting around for a long time now. I went ahead and retrofitted it to my naturally aspirated NA now that my current muffler is on the fritz. From front to back, this system is: 1994 Miata 1.8L, factory airbox, factory header, TsudoN1 midpipe w/ 18" resonator, Mazdaspeed3 muffler. The results are below:

Before warming it up, the muffler has the potential to wake small children at idle and a blip of the throttle within my 40' wide residential lot. In a typically suburban neighborhood with large lots, I wouldn't think twice about the extra noise while the exhaust warms up.

Once it warms up, the muffler has a nice soft rumble at idle (similar to the speed3). With a blip of the throttle, and at low speed acceleration, it's a bit louder than I appreciate, kind of like a Borla or similar, but it does not drone or rasp which is pleasing.

Where this muffler really shines is medium to hard acceleration. It really loves the high flow and screams/rumbles at WOT. My plan is to take this out to an autocross with a decibel meter and see if it is within acceptable sound limits. It's hard to tell how loud it is to observers.

Pics attached. Video attached (more road noise than I expected, so refer to the time stamps below)
0:50 Idle to moderate acceleration into residential traffic
3:00 Moderate acceleration from stop light
3:50 Accelerating onto highway
4:17 Downshift and accelerate to pass
7:13 U-turn and accelerate back onto highway

Attached Thumbnails
Retrofitted a Mazdaspeed3 Muffler on Naturally Aspirated NA-photo-1.jpg   Retrofitted a Mazdaspeed3 Muffler on Naturally Aspirated NA-photo-2.jpg   Retrofitted a Mazdaspeed3 Muffler on Naturally Aspirated NA-photo-3.jpg   Retrofitted a Mazdaspeed3 Muffler on Naturally Aspirated NA-photo-4.jpg  

Last edited by Enginerd; 05-18-2014 at 11:27 PM.
Enginerd is offline   Reply With Quote
Old 05-25-2014, 02:28 PM   #2
Newb
 
Join Date: May 2014
Posts: 19
Total Cats: 0
Default

Nice. What size inlet/outlet is the mazdaspeed muffler? How much space do you free up under the car? Enough to mount the spare tire down there?
nopahking is offline   Reply With Quote
Old 05-26-2014, 07:55 PM   #3
Senior Member
iTrader: (3)
 
Join Date: May 2005
Location: Mass.
Posts: 816
Total Cats: 41
Default

FYI - Vibrant sells an almost duplicated muffler to the MS3, dimensionally at least.
thasac is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
LucaCarMods's Boosted Dutch Miata Build! LucaCarMods Build Threads 11 02-14-2016 07:13 AM
WTB HPDE miata - Texas Voltwings Cars for sale/trade 0 09-27-2015 07:40 PM
BP-6D on CAS only aidandj MEGAsquirt 14 09-25-2015 06:26 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 09:26 AM.