Miata Turbo Forum - Boost cars, acquire cats.
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Miata Turbo Forum - Boost cars, acquire cats. (https://www.miataturbo.net/)
-   General Miata Chat (https://www.miataturbo.net/general-miata-chat-9/)
-   -   My New Custom DP and a little donut vid (https://www.miataturbo.net/general-miata-chat-9/my-new-custom-dp-little-donut-vid-45135/)

Rushin 03-19-2010 09:00 AM
It was 600 with tax and install.

TurboTim 03-19-2010 09:07 AM
Good to know, thanks.

Enthuza 03-19-2010 09:26 AM
Rushin, give me a call when your ready for a 3" exhaust I'll make you a good deal. Jason.

icantthink4155 03-19-2010 10:15 AM
I love how as soon as it starts to warm up several people post donut videos.

Slayer 03-19-2010 10:54 AM
That DP is a beauty for sure..

I thought I read somewhere that, ideally, you want exhaust ID to gradually INcrease? But yours DEcreases... I'm not saying they made your DP backward, but did they?

Rushin 03-20-2010 11:18 PM
Originally Posted by Slayer (Post 540931)
That DP is a beauty for sure..

I thought I read somewhere that, ideally, you want exhaust ID to gradually INcrease? But yours DEcreases... I'm not saying they made your DP backward, but did they?
I have never heard that. Its always either stays the same or decreases. Mine is done that way is because i have a 2.25" catback so mating a 3" downpipe to 2.25" catback is impossible.

TurboTim 03-21-2010 10:31 AM
Originally Posted by Rushin (Post 541730)
I have never heard that. Its always either stays the same or decreases. Mine is done that way is because i have a 2.25" catback so mating a 3" downpipe to 2.25" catback is impossible.
I'd guess that you'd want the larger dia section as close to possible to the turbo as the exhaust is hotter and takes up more volume. So a 3 to 2.25 or whatnot is better than 2.25 to 3. IMHO.

Get a full 3" exhaust.


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