what is the difference between internal and external waste gate and what is the advantages? I'm planning on having a custom turbo manipold done but don't know if I should have External Waste put on.

The basic differences is that an internal wastegate is built into the turbo and makes the exhaust bypass the turbo internally, controlling the amount of boost. External wastegates vent the exhaust gasses to the atmosphere. Internal wastegates are probalby better for lower boost, while external wastegates are better for higher boost applications. Internal and external wastegates probably control boost well at lower PSI, but external wastegates alleviate boost creep at higher PSI. If youre planning on running large amounts of boost sometime in the near future, id suggest getting an external. If youre only going to run a t-25, 14b, or 16g, its not wise to spend the extra money on an external wastegate until you really need it.

For example, im going to be running a 14b turbo at about 6psi until I rebuilt. Even after the rebuilt, im probably going to run about 12-15 psi. Eventually I plan to upgrade to a 16G or a S16G, but even running stock boost levels (10psi) doesnt facilitate an external wastegate. Most of the 4G63 people from my local DSM club run externals when they reach about 18-20psi.

NeoVB
1997 Eclipse GS

EXTERNAL

INTERNAL

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thanks everyone that was a big help! I think I'll just have an internal since i'm only planning on boosting 10-12 psi max. does anyone know any cheap place that makes custom turbo manifold?

Search for Motofool. He has a hookkup and is having them made to fit whatever turbo you need. I think he is in the 225-275 ish range. Or if your doing a 14b you can have alain95i4 make one for you.

i have a custom kit.. and i got a manifold from turbonetics.. more money then what has been listed tho..bout 300ish.. its the same manifold that star provides.. cause turbonetics makes them for star.. just a thought.. choose what is best for u=).. (the one i'm speaking of is made of cast iron)

>Search for Motofool. He has a hookkup and is having them made
>to fit whatever turbo you need. I think he is in the 225-275
>ish range. Or if your doing a 14b you can have alain95i4 make
>one for you.

www.gottude.com/auto is motofool's site. check it out he's got some good stuff :thumbsup