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Old 03-22-2008, 02:01 AM   #1
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Default 3" turbo back

well, if your miata is turbo, and doesn't have a 3" line... go get one...
its a totally different car,
boost comes on stronger, spools sooner
sounds amazing (kinda loud right now though, need muffler)
its nuts,
i will post vids tomorrow

setup is as follows

intercooled greddy, about 2 inch's of the greddy downpipe remain, right where the bend happens, then its 3 inch all the way to the bumper
i have no cat, no resonator, no muffler

its retarded loud, but i get spool in any gear, at almost any rpm


if u haven't gotten a 3 inch line, go do it, right now... go...


END RANT....
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Old 03-22-2008, 02:05 AM   #2
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What size diameter pipe were you running previous to the 3'' exhaust you are running now? If you were on stock exhaust,then yes,a 3'' exhaust will make a big difference.
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Old 03-22-2008, 02:07 AM   #3
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yea.. i was stock, its like night and day, ill post vids of it tomorrow.
its soo loud, i don't recommend anyone running no cat, no muffler.
its just too loud, and raspy


however, i had my gf drive it, and you could clearly hear the turbo spool
it sounds like your behind a big truck, the kind you can hear the turbo spooling in each gear, no matter how lightly they get on the throttle
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Old 03-22-2008, 02:31 AM   #4
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I love the sound of the turbine in the exhaust, even at idle.

Cat converter kills that sound btw.
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Old 03-22-2008, 03:02 AM   #5
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I just ordered a Straight 2.5" mandrel bent exhaust no muffler from enthuza. I still have the stock greddy DP and a gutted cat. I'm hoping a 2.5" system once completed wont be too loud no cat no muffler. Get some vids up I need to hear how it sounds.
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Old 03-22-2008, 03:04 AM   #6
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You would probably have been better off changing the DP and leaving the stock exhaust That Greddy DP is killing you big time, and a lot of it has to do with the way the flange is set up.
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Old 03-22-2008, 04:44 AM   #7
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Magnaflow high-flow cat + Enthuza 3" FTMFW. Quick spool, awesome sound, and sounds like stock at anything under 1000rpm.

(this is a cold start)
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Old 03-22-2008, 05:35 AM   #8
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Quote:
Originally Posted by jayc72 View Post
You would probably have been better off changing the DP and leaving the stock exhaust That Greddy DP is killing you big time, and a lot of it has to do with the way the flange is set up.
Agreed.
OPEN stock Greddy DP downright sucks compared to a Tony DP with the stock exhaust bolted up.


Sav, needs more turbo whistle. :(
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Old 03-22-2008, 11:25 AM   #9
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the no cat/resonator/muffler probably has about the same effect as going from 2" to 3"...
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Old 03-22-2008, 11:19 PM   #10
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Quote:
Originally Posted by Bryce View Post
Cat converter kills that sound btw.
sounds just fine with a cat and muffler on my car... maybe you just need a bigger turbo
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Old 03-23-2008, 01:39 AM   #11
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I saw you post over on CR.net and wondered how long until you wanted a muffler. I had an SRT-4 exhaust cut up under my car with no cat and no muffler. It wasn't bad at first, but after a few months it was too loud.

If you put a turbo style muffler on you shouldn't notice much difference in power. I had a 2.5" turbo back with a dynomax turbo style muffler, great tone and spool. The stock Greddy dp flange is stupid. Replacing that makes a huge difference (obviously).
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Old 03-23-2008, 11:44 AM   #12
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Quote:
Originally Posted by Bryce View Post
I love the sound of the turbine in the exhaust, even at idle.

Cat converter kills that sound btw.
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