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Old 08-05-2014, 09:04 AM   #301
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The center in/out will fit fine.
The one he has is even quieter.
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Old 08-05-2014, 03:40 PM   #302
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Quote:
Originally Posted by relte View Post
Why are you not using this one (12578)?
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Originally Posted by 18psi View Post
The one he has (12579) is even quieter.
That's the only reason. Abe/ARTech confirmed that the exhausts he's built with the 12579 are slightly quieter than the 12578 that everyone loves, so it wins.
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That center in and center out will be tricky to fit. Even if you install the 12578 in the normal factory orientation instead of an angle, it gives you more room to get in and out of the muffler than the 12579.
I have faith in Gesso's ability to weld things back together after I FaeFae the everliving crap out of them. The gov't paid him to weld F18's back together, so I'm pretty sure he can handle some mild tubes
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12579 is about $20 more too.
I'm willing to pay +$20 for an even quieter exhaust. As fate would have it, I bought the 12579 from 18psi NIB. He values silence as much as I do and he's seen and heard TONS more of these setups than I have. I trust his (somewhat questionable) judgement
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I am guessing you are going for the ARTECH routing as you posted in post #4. I need to add some installed pics of my setup with the muffler at an angle. I have no interference issues or rubbing and it was easy and cheaper to install (one 90 less to buy). I did add all poly exhaust hangers though.
I love install pics, do it! And yes, I'll be following the ARTech routing. If it requires an extra 90 or something I'm really not that worried about it. Are there things I could do to optimize flow and eliminate bends? Probably. Do I actually NEED that extra 2~5%? Lolnope. Minor sacrifices are completely worth it to me to get that extra bit of silence. Magical EFR 6258 will spool like crazy and make more power than I need anyway, plus no E85 so its not like I'm in a pissing match with Soviet here. I've specc'd everything to support ALLOFIT from a 6258 so that option exists. Is 300hp/300tq or more possible from this setup? Hell yes. Do I plan on running that regularly? **** no, I'm a giant
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Have you heard one of these 22" mufflers before? It is super quiet. I actually wish mine was a little louder. It is super stealthy on the street and not that loud at WOT either. I know you guys out west have to be a little quieter at some tracks, but damn, if you add a resonator it will be a wisper!
Super ninja stealth exhaust FTW! I'm one of those guys "out west" with the super sound requirements. Right now I'm at work sitting less than 10 miles from MRLS. I believe they have (don't quote me) a 92db sound requirement for most track events, but I'd prefer to be WELL under that.
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I like that tip. I need to do something to mine. The straight 3" tip looks ugly as hell!
Thanks! We'll see how well it fits the bumper cutout once it gets here. I'll post pics.
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Old 08-05-2014, 08:11 PM   #303
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Time to face facts: I'm not going to have the EFR in the car for Miatas @ MRLS in September

Why?
  1. Manifold and downpipe aren't here yet
  2. Exhaust system parts are not here yet
  3. Once the parts get here, it still needs to be fabricated
  4. Donor for built motor isn't even in the shop
  5. Intercooler mounting/plumbing isn't mapped out
  6. Oil/Water lines are not completed
  7. I've been working a minimum of 58hrs/wk for the past 3 weeks and I don't see this changing going forward
  8. I'm in Las Vegas this weekend so that's another whole weekend lost
  9. There is no way in hell I have time to complete this in 3 weekends
Sooo... priorities are going to shift a little. I'll still be there, but I'm going for a SuperMiata kinda build rather than all out with the EFR.

**** what needs to get done:
  1. Ordered RacingBeat "Race Connecting Pipe" to complete exhaust
  2. Order parts and build SuperMiata style intake
  3. Install monstrous TSE radiator
  4. Fix my stupid ducting
  5. Port Squaretop for 64mm throttle body
  6. Install Squaretop + Hondata gasket + 64mm throttle body
  7. Finally install Carbotech brake pads
  8. Brake ducts
  9. Install aftermarket gauges (specifically oil pressure, oil temp, coolant temp)

If I have time, maybe:
  1. FM framerail braces
  2. SuperMiata damper + 4T wheel
  3. Find out what Andrew @ Trackspeed wants for a couple of hours of N/A dyno tune time

Its not a terrible list, and without the actual 140~ish hp SuperMiata horsepower "cap" maybe we can squeeze a couple extra horses out of this BP4W. Should still be fun and totally attainable.

Last edited by EO2K; 08-05-2014 at 08:44 PM.
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Old 08-06-2014, 12:08 PM   #304
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Well Damn! Sound like you have a good plan already. With that resonator you should meet your sound goal easily. I was seriously surprized and almost dissapointed when I started my car with the 12578 for the first time. Couldn't hear a thing. I now vaguely remember the center/center one being reported to be a little quiter when i did the research for my build.


Sorry to hear your track day plans are going to crap. If it makes you feel better, mine are too. I was planning one the first week in October. Would be the first one since the turbo went on the car. I set a goal to have the thing on the road for proper tuning and shakedown runs before end of July so I could get everything figuired out by the end of September. All that got screwed when I blew something in the MS2 this past weekend!
Oh well! Good luck!
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Old 08-06-2014, 04:03 PM   #305
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I used a 12589 with one center and one offset because I was not sure how the inlet routing would be. Allowed me to use front, middle or back entrance from the mid-pipe. Ended up using the center and the offset was for the exit. So, you should have no problem with the center / center.

Sound is good with this muffler and the big 3" Cat (P/N 59959), which I would expect to have similar sound effect as the resonator. Not perfectly quiet, deep throaty with no droning, and no ricer fart sound.
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Old 08-07-2014, 11:13 AM   #306
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I'm pleased with the 12589 with straight pipe; plenty quiet in all DD conditions and I haven't even run it with my cat in yet. A resonator/cat will probably kill it dead.
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Old 08-07-2014, 01:36 PM   #307
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Sad I won't see yah at MRLS. You should at least show up so I can let you drive my car!
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Old 08-07-2014, 07:21 PM   #308
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what makes you think he won't make it?
he said he just won't make it in boosted form
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Old 08-07-2014, 07:32 PM   #309
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Seriously, he's just down the street, he'll be there.

this is gonna be awesome.
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Old 08-07-2014, 07:46 PM   #310
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Insomniatic reading comprehension fail...
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Old 08-08-2014, 01:20 AM   #311
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Yes, I'll be @ MRLS unless someone who has my last name or I share a significant portion of my genetic code with is in the hospital.

One of the guys at work emailed me this afternoon and ask why there was a pile of boxes for me at the office that, and I quote "sounds like a robot orgy when shaken." I think my exhaust components have arrived
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Old 08-09-2014, 05:32 PM   #312
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Quote:
Originally Posted by DNMakinson View Post
I used a 12589 with one center and one offset because I was not sure how the inlet routing would be. Allowed me to use front, middle or back entrance from the mid-pipe. Ended up using the center and the offset was for the exit. So, you should have no problem with the center / center.

Sound is good with this muffler and the big 3" Cat (P/N 59959), which I would expect to have similar sound effect as the resonator. Not perfectly quiet, deep throaty with no droning, and no ricer fart sound.
Update: My memory is not so good. Working on the car today and realized that, with the longer radius bends, I went to the offset inlet. So, if you go to center, you may well need tighter radius 90's or 180's. Here is a picture of my installation:

Attached Thumbnails
Nothing to see here, just project Sisyphus, move along-p1020548.jpg  
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Old 08-10-2014, 07:13 PM   #313
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Yes, I'll be @ MRLS unless someone who has my last name or I share a significant portion of my genetic code with is in the hospital.

One of the guys at work emailed me this afternoon and ask why there was a pile of boxes for me at the office that, and I quote "sounds like a robot orgy when shaken." I think my exhaust components have arrived
Epic response, props given. Look forward to meeting you @ MRLS. I was bummmed when you posted about the plans changing thinking you were saying you weren't gonna make it.

The nice thing about the NA track car setup is it's just a show up, check oil, drive car type-a thing. That'll be perfect for the relaxed miata's @ mrls track day atmosphere.
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Old 08-11-2014, 01:18 AM   #314
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DNM: Thanks for the pics. And yeah, I bought tight radius bends because I figured that would be easier to fit. In fact, I did 16ga mild because the available radii were tighter from the vendor I chose to use. It might not be "ideal" or "optimal" but I'm sure it'll be fine for my goals.

EE: Yep, a well set up Miata at speed is a helluva bunch of fun at the track. It just sucks to miss the goalposts. And really, I'm not that impressive a human being, just a guy with too much time on his hands.
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Old 08-12-2014, 12:27 PM   #315
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Quote:
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Because I'm looking at the pop-out ones. If that's the case, that's exactly what I wanted to hear My only concern is rain. Have you had them in the rain yet?
Dude, I had the pop-out helicopter vents in Florida. No issues with rain.

Don't you live in/near Monterey though? Rain ought to be the last thing you're concerned with, lol. Rain. You're funny.
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Old 08-12-2014, 12:32 PM   #316
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He lives in amazing weather. Seriously awesome.
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Old 08-12-2014, 01:57 PM   #317
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Finally a damn pic to look at
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Old 08-12-2014, 02:11 PM   #318
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And its not even my car!

You people rapidly forget how much of a giant wuss I am.

Koto: did you have the NSX out on Hwy 68 sometime in the last couple weeks? I think I spotted you. Red NSX really stands out in a crowd
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Old 08-12-2014, 02:34 PM   #319
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He lives in amazing weather. Seriously awesome.
Yeah. During the summer months the windows on my house here just stay open. I drove the NSX around without windshield wipers on for two months because I took them off to paint them and just never bothered to put them on again. The funny thing is that the locals complain that it's "freezing" and break out the umbrellas for a light mist.
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Old 08-12-2014, 02:37 PM   #320
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And its not even my car!

You people rapidly forget how much of a giant wuss I am.

Koto: did you have the NSX out on Hwy 68 sometime in the last couple weeks? I think I spotted you. Red NSX really stands out in a crowd
Hmm, maybe. Look for blue lugnuts on RPF1s, or for aerocatch pins. There might be a couple other red NSX coupes around here but only mine has those AFAIK.
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