eBay resonated test pipe... - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 07-09-2012, 01:37 PM   #1
Crumple Zone Tester
Thread Starter
iTrader: (7)
 
mgeoffriau's Avatar
 
Join Date: Jul 2009
Location: Jackson, MS
Posts: 7,656
Total Cats: 447
Default eBay resonated test pipe...

This MOAB Miata has a straight test pipe in place of a cat at the moment....and it's stupid loud. The combination of the Whipplecharger, the RB header, the straight test pipe, and the FM exhaust is head-splitting for me.

The car is for sale but whether I keep it for a while or sell it soon, I'd rather cut the noise down for my own use or to not drive away prospective buyers with the stupid noise.

I was going to remove the test pipe and take it to a muffler shop to weld in a resonator, but then I searched eBay and found stuff like this:

Mazda Miata MX5 1.8L 94-97 Catless Pipe Pipes Test Pipe Resonated De-Cat

I figure that's about as much as I'd spend at a muffler shop, and this way I'd give the buyer the choice of swapping in one or the other.

Anyone tried one of these? For $75 is it worth a shot, or should I just head off to the muffler shop?
mgeoffriau is offline   Reply With Quote
Old 07-09-2012, 02:54 PM   #2
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,847
Total Cats: 1,788
Default

add a real cat and it will tone down the rasp a little, but the combo of a header + open exhaust = annoyingly loud awful terrible exhaust noise.

i cant imagine what it must be like with the SC whine in there as well.

I had a borla exhaust, then added a header. It was so loud, the only option was to turbo the car.
Braineack is offline   Reply With Quote
Old 07-09-2012, 03:06 PM   #3
Crumple Zone Tester
Thread Starter
iTrader: (7)
 
mgeoffriau's Avatar
 
Join Date: Jul 2009
Location: Jackson, MS
Posts: 7,656
Total Cats: 447
Default

It's not so much the SC whine (which is there) as it is the mostly open exhaust with all the additional exhaust volume.

Would a cat really be that much better than the resonated pipe? It'd be twice the cost. I know this exhaust setup will never be OEM-quiet, I just wanted something that doesn't induce headaches.
mgeoffriau is offline   Reply With Quote
Old 07-09-2012, 03:09 PM   #4
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,847
Total Cats: 1,788
Default

I dont think either are really going to help you. You need a the biggest muffler you can find. and then add two. and install baffles. and stuff it with potatos.
Braineack is offline   Reply With Quote
Old 07-09-2012, 03:20 PM   #5
Elite Member
iTrader: (17)
 
Join Date: Aug 2007
Location: Fort Myers, FL
Posts: 2,791
Total Cats: 129
Default

I've had great luck with Ebay resonated testpipes. I ran one on my supercharged S2000 and my previous turbo Miata that was straight piped. In both instances it reduced overall noise, but more significantly elimnated the annoying raspy sound. Granted the turbo in itself muffles sound a good bit, but the resonator alone took my miata from completely unbearable to being streetable. It won't do as much as a good muffler, but it will certainly help.
pdexta is offline   Reply With Quote
Old 07-09-2012, 03:30 PM   #6
Crumple Zone Tester
Thread Starter
iTrader: (7)
 
mgeoffriau's Avatar
 
Join Date: Jul 2009
Location: Jackson, MS
Posts: 7,656
Total Cats: 447
Default

Cool! Thanks for the info. Does the one I linked to look basically like the same product (I know, how different could a resonated pipe look)?
mgeoffriau is offline   Reply With Quote
Old 07-09-2012, 04:51 PM   #7
Crumple Zone Tester
Thread Starter
iTrader: (7)
 
mgeoffriau's Avatar
 
Join Date: Jul 2009
Location: Jackson, MS
Posts: 7,656
Total Cats: 447
Default

Hmm. Amazon has the Magnaflow direct-fit catalytic converter for $115 shipped.

Worth the extra $40?
mgeoffriau is offline   Reply With Quote
Old 07-09-2012, 05:07 PM   #8
Elite Member
 
Join Date: Jul 2005
Posts: 6,454
Total Cats: 80
Default

You probably want to find out if they last long. The thing about cheap resonators (and straight through) mufflers, is that they get louder over time.
JasonC SBB is offline   Reply With Quote
Old 07-09-2012, 05:44 PM   #9
Crumple Zone Tester
Thread Starter
iTrader: (7)
 
mgeoffriau's Avatar
 
Join Date: Jul 2009
Location: Jackson, MS
Posts: 7,656
Total Cats: 447
Default

Ordered the Magnaflow 23696 catalytic converter. For the different in cash, I figured it was worth it.
mgeoffriau is offline   Reply With Quote
Old 07-10-2012, 12:01 AM   #10
Junior Member
iTrader: (3)
 
Join Date: Mar 2008
Location: Murphy, Tx
Posts: 182
Total Cats: 6
Default

A word of caution about the gaskets that come with these and other chinese exhaust parts.

I can't speak for every chinese gasket but I have an ebay test pipe very similar to this one and the gaskets that came with it are perforated metal with a cream/off-white core. The core of the gasket is roughly 80% asbestos(chrysotile only.) I know this because I actually worked at a lab that did testing for asbestos and I tested the material myself both by polarized light microscope and transmission electron microscope.
I also have a chinese T3/T4 that came with a black oil drain gasket that contains roughly 5% asbestos.

By itself it's not a big deal if the gasket isn't damaged or abraded. But if you use a grinder, cut-off wheel, or a 3M gasket remover disc on one of these gaskets it can put a substantial amount of fibers in the air that will stay in the air for a long time.

Additionally, even though I have not personally tested them, I suspect other Chinese products such as brakes and clutches may contain asbestos so use caution if you run them on your car(don't use compressed air to clean off brake and clutch dust, no sanding or grinding.) Again no proof of it, but please use caution.


Cliff's notes:
Some Chinese gaskets contain asbestos, please use caution.
Fidgitk is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 57 07-19-2017 05:11 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
"Chimney Ethanol" E100 MiataGarage Engine Performance 5 09-30-2015 12:04 AM
3rd Time's a Charm...hopefully. zephyrusaurai Meet and Greet 2 09-28-2015 11:59 PM


Thread Tools

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 07:14 AM.