NB midpipe options. - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Race Prep Miata race-only chat.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 01-25-2015, 11:08 PM   #1
Elite Member
Thread Starter
iTrader: (2)
 
Mobius's Avatar
 
Join Date: May 2008
Location: Portland, Oregon
Posts: 3,178
Total Cats: 267
Default NB midpipe options.

My stock gutted-cat midpipe has horrible resonance at 3k rpm, resulting in a very unpleasant drone, and frequent backfire pops on decel. Which, actually, is not that unpleasant, but now that the cat is gutted (which I regret, was done chasing a problem) I can't run my Enthuza muffler on the street without Serious. Rice. Factor. I mean, surrus! Huge neighborhood-echoing volume at anything over 10% throttle. Cat-scaring decel pops galore.

What I want:
a resonated NB midpipe without a cat (so I can run 110 race fuel if I want)

What I've found:
  • Roadstersport mdpipe with cat. Overall this would be fine I think, except for the cat part. Gutting it would put me where I am now. The thin walls of the catalytic really want to resonate and rejoice in their freedom when the interior matrix of the cat is removed.
  • Racing Beat NB Race Pipe. This has no resonator. I think it would be fine, except that it conflicts with my stock butterfly brace, and I'm somewhat concerned about Portland International Raceway sound check without a resonator in my midpipe.

Personally, a loud exhaust will not bother me in the car, if it's consistent, you know what I'm saying? Right now, with my Enthuza muffler, (which is not the problem) the car has a great idle sound, and great street sound if you stay out of the throttle. The minute you get into it, even 25%, sound levels change drastically in ricer fashion, and there's that horrible drone at 3k rpm. The stock muffler has enough damping factor to it to cancel out most everything. But the Enthuza muffler reveals the flaws of my current midpipe like good speakers reveal the flaws of a crappy head unit.

So is there an option I haven't found? Or do I need to ask Enthuza to build the midpipe I want for me if I don't want the Racing Beat option.

Edit: the problem with the Racing Beat midpipe is that I'm concerned I will blow sound check at Portland International Raceway on "quiet Mondays." I am double-checking what that limit is exactly. My car is by-the-ear not at all quiet currently when I've listened to it on the few occasions I've trusted it to others.

Thanks bros.
Mobius is offline   Reply With Quote
Old 01-25-2015, 11:44 PM   #2
Elite Member
iTrader: (5)
 
Join Date: Dec 2010
Location: Raleigh, NC
Posts: 1,970
Total Cats: 49
Default

Enthuza will make you a mid-pipe without a cat but with a resonator if you want. I had some gripes with his work, but its held up for 3+ years now, so I can't complain.

Any local shop can do that for you also...
Seefo is offline   Reply With Quote
Old 01-26-2015, 01:00 AM   #3
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 9,642
Total Cats: 954
Default

Quote:
Originally Posted by Mobius View Post
  • Racing Beat NB Race Pipe. This has no resonator.


Attached Thumbnails
NB midpipe options.-56439.jpg  
EO2K is offline   Reply With Quote
Old 01-26-2015, 01:10 AM   #4
Elite Member
Thread Starter
iTrader: (2)
 
Mobius's Avatar
 
Join Date: May 2008
Location: Portland, Oregon
Posts: 3,178
Total Cats: 267
Default

As advertising is fond of saying, "image is not representative of product."

Go to 949 and try to buy a resonated 99-05 midpipe. I DOUBLE DOG dare you.
Mobius is offline   Reply With Quote
Old 01-26-2015, 01:13 AM   #5
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,202
Total Cats: 2,584
Default

why not just weld in a resonator onto your current gutted stocker?
go nuts and get the biggest one with the most packing that you can fit under a miata.

heck, go ever further and run 2, like I did on my 99 lol
18psi is offline   Reply With Quote
Old 01-26-2015, 01:19 AM   #6
Elite Member
Thread Starter
iTrader: (2)
 
Mobius's Avatar
 
Join Date: May 2008
Location: Portland, Oregon
Posts: 3,178
Total Cats: 267
Default

Yeah that's a good idea. Just have them cut out the existing cat and put in a resonator of the same length. I will look into that.

So many new shinies in my life I went straight to new shinies for this problem when I probably don't need to.
Mobius is offline   Reply With Quote
Old 01-26-2015, 01:38 AM   #7
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 9,642
Total Cats: 954
Default

Quote:
Originally Posted by Mobius View Post
Go to 949 and try to buy a resonated 99-05 midpipe. I DOUBLE DOG dare you.
I bought one from 949 right before Miatas @ MRLS this year. It's definitely got a giant resonator in it.

EO2K is offline   Reply With Quote
Old 01-26-2015, 01:40 AM   #8
Elite Member
Thread Starter
iTrader: (2)
 
Mobius's Avatar
 
Join Date: May 2008
Location: Portland, Oregon
Posts: 3,178
Total Cats: 267
Default

With a resonator? There's no such option on the site. Only the straight-thru test pipe. Yes, take a pic please.

Edit. Goddamit

GODDAMMIT

This is what the day after the sleepover birthday party of your now-11yo does to you. Mental mush ... inability to form sentences more complex than "need beer" ... reading comprehension failure.

/thread
Mobius is offline   Reply With Quote
Old 01-26-2015, 01:42 AM   #9
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 9,642
Total Cats: 954
Default

Edited the post to include pic, just to make things confusing.
EO2K is offline   Reply With Quote
Old 01-26-2015, 01:44 AM   #10
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 9,642
Total Cats: 954
Default

This thread is starting to deliver

But seriously, do what Vlad said and replace your gutted cat with a big *** resonator. If what you have now is working a resonator will only make it better?
EO2K is offline   Reply With Quote
Old 01-26-2015, 01:46 AM   #11
Elite Member
Thread Starter
iTrader: (2)
 
Mobius's Avatar
 
Join Date: May 2008
Location: Portland, Oregon
Posts: 3,178
Total Cats: 267
Default

This would be my annual WTF how did I fail here moment.

Edit: and the leaded race fuel is a no go anyway, because it would kill my O2 sensors, which I forgot about. The stock ones don't matter much at this point, but the LC-1 needs to live.
Mobius is offline   Reply With Quote
Old 01-26-2015, 01:52 AM   #12
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 9,642
Total Cats: 954
Default

We really need to just post instead of constantly editing previous posts.
EO2K is offline   Reply With Quote
Old 01-26-2015, 02:11 AM   #13
Elite Member
Thread Starter
iTrader: (2)
 
Mobius's Avatar
 
Join Date: May 2008
Location: Portland, Oregon
Posts: 3,178
Total Cats: 267
Default

Six 10 to 11 year old boys that were not mine. No property damage, only a little blood. They probably got 3 hours of sleep. I maybe got 4. And the thing is, with other peoples' kids, you have to be nice to them. You can't treat them like you do your kids. So taxing!

Is a joke, of course ... I treated them just as poorly as I do my own.

KIDDING!

It was fun but draining. Not my sharpest today.
Mobius is offline   Reply With Quote
Old 01-26-2015, 02:48 AM   #14
Elite Member
 
codrus's Avatar
 
Join Date: Mar 2007
Location: Santa Clara, CA
Posts: 3,878
Total Cats: 344
Default

This is one reason why turbos are better than superchargers.

--Ian
codrus is offline   Reply With Quote
Old 01-26-2015, 02:53 AM   #15
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,202
Total Cats: 2,584
Default


kick him while he's down
18psi is offline   Reply With Quote
Old 01-26-2015, 03:30 AM   #16
Elite Member
Thread Starter
iTrader: (2)
 
Mobius's Avatar
 
Join Date: May 2008
Location: Portland, Oregon
Posts: 3,178
Total Cats: 267
Default

Yes. I am definitely down. Lay thine boots upon me
Mobius is offline   Reply With Quote
Old 01-26-2015, 01:22 PM   #17
Senior Member
iTrader: (3)
 
Join Date: Dec 2008
Location: KY
Posts: 700
Total Cats: 51
Default

I have the RB midpipe and will vouch that it looks exactly like E02K's pic and has a resonator. I'm running it with stock header and stock NB rear section on my daily driver. It's only barely louder than stock but adds a little rasp. It's exactly what I wanted for a daily driver.
jpreston is offline   Reply With Quote
Old 01-26-2015, 01:35 PM   #18
Elite Member
Thread Starter
iTrader: (2)
 
Mobius's Avatar
 
Join Date: May 2008
Location: Portland, Oregon
Posts: 3,178
Total Cats: 267
Default

Yes, thanks, I need no further convincing. I took a quick online course from the Derek Zoolander Center For Children Who Can't Read Good And Wanna Learn To Do Other Stuff Good Too, and I am pleased to report it has made my reading comprehension 100% gooder.

For example, when I read the description of the 99-05 Racing Beat Race Pipe on the 949 website, I now comprehend the words "This resonated connecting pipe incorporates a pre-silencer that has been tuned ...". It means it has a resonator! I read good now.
Mobius is offline   Reply With Quote
Old 01-26-2015, 01:41 PM   #19
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,202
Total Cats: 2,584
Default

thread delivered


IS THIS RESONATOR FOR ANTS!!!!!!????????????1111111111
18psi is offline   Reply With Quote
Old 01-26-2015, 02:11 PM   #20
mkturbo.com
iTrader: (24)
 
shuiend's Avatar
 
Join Date: May 2006
Location: Charleston SC
Posts: 13,780
Total Cats: 1,106
Default

I can hook you up with an awesome mid pipe. No resonator in it, but comes with this AMAZING new device called a TURBO that makes the exhaust quiet.
shuiend is online now   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Koni/GC/Eibach combo with spare springs hector Miata parts for sale/trade 1 08-31-2015 08:26 PM
Track Video & Bluetooth MS3 Questions ofspunk7 General Miata Chat 3 08-31-2015 03:14 PM
Enthuza Group Buy Prices up tiber55 Group Buys and Member Discounts 22 05-13-2009 11:13 PM
WTB: Stock NB midpipe and muffler posidon42 WTB 2 09-08-2008 05:08 PM
this is weird...... FM midpipe didn't fit airbrush1 General Miata Chat 0 10-08-2006 09:49 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 09:34 PM.