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Old 10-25-2013, 03:39 PM   #41
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Where did you see that? Most cost $450-600 for the catback, and another $300 or more for the midpipe/cat.

Oh, I see, you have an NA. I'm looking at NB systems I guess, which are a lot more expensive. I never noticed since I've never cared about NA exhausts.
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Old 10-28-2013, 03:59 PM   #42
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I've ordered a 2,5" cat replacer and cat back system. I know a 3" would be better, but a full 2,5" system is way better than what's installed now.
At the moment my decat pipe is 2" and cat back 2,25"

suggestions for a next step?
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Old 10-28-2013, 04:01 PM   #43
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yes.

3"
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Old 10-28-2013, 04:04 PM   #44
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Quote:
Originally Posted by 18psi View Post
yes.

3"
Or 1.8 swap.
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Old 10-28-2013, 04:11 PM   #45
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@18PSI

can you show me the difference in power gain on a 1,6 with a 2,5" vs a 3" please?


@leafy
1,8 swap is not an option for now
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Old 10-28-2013, 04:35 PM   #46
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Quote:
Originally Posted by miatadaxdriver View Post
@18PSI

can you show me the difference in power gain on a 1,6 with a 2,5" vs a 3" please?

Has next to nothing to do with motor size. You have a turbo car, and you're making xxx amount of power.

If there's power gain on a turbo 1.8 going from 2.5" to 3.0" then there's gains on a turbo 1.6.
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Old 10-28-2013, 04:57 PM   #47
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I don't need to show you anything. I don't care. You see - when we suggest things to people around here the burden of proof is not on us, because ultimately its your car and no one cares. We simply provide advice based on what we've experienced and seen. No one is going to go out of their way searching for threads and info...You should be the one doing it. You asked for advice on improving spool, you got it. You decided to do like 3/4's of it, then ask us "what is the next step". Its almost like you really want to spend more time and money for less results. Why not just do something properly from the get-go?

Just a thought.
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Old 10-28-2013, 05:01 PM   #48
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Dirty vlad and the boys are right again. OP return your exhaust while you still can and get something you wont have to upgrade again down the road, it sucks, i know.
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Old 10-28-2013, 05:17 PM   #49
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Ok, I give up What about FM?

my only other option is return the 2,5" and buy this one
fits my 2,5" DP
http://www.flyinmiata.com/tech/dyno_...id_exhaust.pdf
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Old 10-28-2013, 05:19 PM   #50
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Sure looks like a 3" exhaust.
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Old 10-28-2013, 05:24 PM   #51
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waste of money?
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Old 10-28-2013, 05:26 PM   #52
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I'm a little curious as to how you arrived at that conclusion...
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Old 10-28-2013, 06:21 PM   #53
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Sorry, my mistake. My english is like my exhaust. Not very good at the moment.

Now I know: sure looks like = is

Thanks concealer404
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Old 10-28-2013, 06:32 PM   #54
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Now figure out a 3" downpipe or something for maximum baller.
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Old 10-28-2013, 07:02 PM   #55
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Quote:
Originally Posted by miatadaxdriver View Post
Sorry, my mistake. My english is like my exhaust. Not very good at the moment.


Glad you are going for a 3" now. I too thought 2.5" "was enough", now i'm going to re-buy a downpipe and exhaust because of it.

By once, cry once.
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Old 10-28-2013, 07:45 PM   #56
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It's all in the downpipe anyway.

Just do a 3" turbo back, and call it a day. This REALLY isnt complicated.

3" turbo back.

Mandrel bent.

High flow cat or none.

Straight through mufflers you can roll a tennis ball through.

Done. Honestly.

Dann
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Old 10-28-2013, 09:08 PM   #57
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Quote:
Originally Posted by nitrodann View Post
Straight through mufflers you can roll a tennis ball through.
Regulation tennis ball is 2.575–2.700 inches

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Old 10-28-2013, 09:17 PM   #58
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Its a pretty common figure of speech when referring to mufflers.

Dann
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Old 10-28-2013, 09:23 PM   #59
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I know, I'm just feeling snarky and I had to look up the tennis ball thing the other day so it was topical.

I'm really not one to talk, I'll be running 2.5" from DP to bumper because I can't take good advice.
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Old 10-28-2013, 10:53 PM   #60
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Question: Who is the weenie complaining about slow spool? Answer: Not the guy with a 3 inch exhaust from the turbo back.
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