New exhaust. (or lack thereof) - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 05-01-2009, 07:31 PM   #21
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Originally Posted by The_Pipefather View Post
So the tracks you run at obviously dont have any sort of sound restrictions in place?
103dB at most tracks, this falls under that. Turbos are excellent mufflers.
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Old 05-01-2009, 07:47 PM   #22
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I like it. Glad to see you've come to the dark side.
You beat me to it, I was going to post up mine soon.

Everything after my downpipe (keep in mind this cat is hollowed out) it's all 3":



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Old 05-01-2009, 08:07 PM   #23
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Originally Posted by Savington View Post
103dB at most tracks, this falls under that. Turbos are excellent mufflers.
Don't get your hopes up too high, I know 103 is alot more than 95. But my Enthuza 3" _with_ CAT makes 96 already.
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Old 05-01-2009, 08:28 PM   #24
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um Sav I would check into that.

Laguna Seca is normally a 95 db track on a big event. And for club events is even lower. UFO runs a 92 sound limit but rarely enforces it (I ran my CSP car open header many times there). And Thunderhill has a sound limit as well, ever since the dairy farmers bitched.
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Old 05-01-2009, 09:01 PM   #25
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Originally Posted by Qckslvr View Post
um Sav I would check into that.

Laguna Seca is normally a 95 db track on a big event. And for club events is even lower. UFO runs a 92 sound limit but rarely enforces it (I ran my CSP car open header many times there). And Thunderhill has a sound limit as well, ever since the dairy farmers bitched.
Laguna is 92 usually. SCCA weekends it is anywhere from 90-103 depending on the time of the day.

Thunderhill is 103, Buttonwillow is 103, etc. He will be fine.
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Old 05-02-2009, 06:52 AM   #26
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Of course it also depends on how they measure: dB or dB(A). Where I was last Wednesday there are three sound check points along the track both left and right (alternating and usually where the racing line is). All are corner exit WOT points of course...
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Old 05-02-2009, 07:06 AM   #27
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They measure in one point at Laguna, off to the right-hand side going up the hill into 6. Left-exit exhausts are the norm at SCCA races.
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Old 05-02-2009, 10:35 AM   #28
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at least put the det cans on and go for a listen, but you need to get it back on the dyno because you've definitely changed the VE with that shorty.
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Old 05-02-2009, 12:34 PM   #29
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They measure in one point at Laguna, off to the right-hand side going up the hill into 6. Left-exit exhausts are the norm at SCCA races.
Win. Seriously.
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Old 05-02-2009, 01:45 PM   #30
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They measure in one point at Laguna, off to the right-hand side going up the hill into 6. Left-exit exhausts are the norm at SCCA races.
Execution of environmental measures like this is to be expected from a country that doesn't seem to care about the Kyoto protocol either. Still win though...
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Old 05-02-2009, 02:54 PM   #31
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Originally Posted by Spookyfish View Post
Execution of environmental measures like this is to be expected from a country that doesn't seem to care about the Kyoto protocol either. Still win though...
WTF is the kyoto protocol? See we just igniant, we cares about the environment two!
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Old 05-02-2009, 03:21 PM   #32
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"You see, most blokes will be playing at 10. You’re on 10, all the way up, all the way up...Where can you go from there? Nowhere. These go to 11."

11?? Needs MOAR!!! Real men go to 50+!!!



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WTF is the kyoto protocol? See we just igniant, we cares about the environment two!
Whats this we ****? You got a mouse in your pocket?
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Old 05-02-2009, 08:12 PM   #33
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To appreciate how loud this is, here's my car with the full exhaust. Note how loud the BOV is:



This is with the turndown:
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Old 05-02-2009, 08:45 PM   #34
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you need to clean up those wires
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Old 05-02-2009, 08:45 PM   #35
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awesome. very mad maxxish interior. hearing the turbo through the exhaust in that outside the car vid is dope too.
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Old 05-02-2009, 08:51 PM   #36
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Turbo spooling any quicker? Notice any quicker throttle response?
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Old 05-02-2009, 09:02 PM   #37
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Turbo spooling any quicker? Notice any quicker throttle response?
Much better throttle response. It's surprising how much better it is. I won't comment on spool until I get a datalog on it.
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Old 05-02-2009, 09:23 PM   #38
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savington....what bov is that? greddy type rs?
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Old 05-02-2009, 09:23 PM   #39
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and i love the exhaust sound btw
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Old 05-02-2009, 09:41 PM   #40
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Yup, that's exactly how I've run mine for the past year or two, track only of course. Although I run a 2.5" cat. I did have to put it through DMV testing, and it measured 93.4 dB at 2500rpm with the mic right behind the rear bumper. Limit in Oregon is 93, so I went to another place the next day and they passed me without checking

Are you going to put some sort of gutted dash plastic back in? It weighs next to nothing ya know, looks much better too.
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