Miata Turbo Forum - Boost cars, acquire cats.

Miata Turbo Forum - Boost cars, acquire cats. (https://www.miataturbo.net/)
-   DIY Turbo Discussion (https://www.miataturbo.net/diy-turbo-discussion-14/)
-   -   begi cast manifold w/ external wg (https://www.miataturbo.net/diy-turbo-discussion-14/begi-cast-manifold-w-external-wg-12973/)

trojan 09-29-2007 02:01 PM

begi cast manifold w/ external wg
 
i've been poking around this website to try and find on what to do with my 1.8 begi cast manifold that has no external wg. am i stuck with using a turbo with an internal wg, or is there anybody that can help me out?

m2cupcar 09-29-2007 02:44 PM

an external gate flange/port can be welded to it

Braineack 09-29-2007 02:45 PM

There's nothing "wrong" with internal. Anything you want comes either way.

Corky can modify the manifold for a cost if you really want external

trojan 09-29-2007 03:20 PM

thanks guys, i've been cranking a lot of info in these past weeks from this website and its been nothing but helpful, but i have very little knowledge about turbochargers, and i found out that pretty much all turbos from from factory cars have external wg. i didn't realize that the little gold canister on the turbo is an external wg.

bripab007 09-29-2007 05:57 PM

I hate to break it to you, but the little gold cannister is not the wastegate, it's the wastegate actuator; basically it's a spring and diaphragm with a pressure port so the boost can open the internal wastegate door at the appropriate pressure differential.

Pretty much 99% of factory turbocharged cars are internally wastegated, from the Mazdaspeed 3 to the Bugatti Veyron.

MiaTurbo 09-30-2007 05:43 PM

yep, OEM is most likely internal. I'd spend a little more time reading about what the parts of a turbo are.


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