[noob]What's the difference between an internal and external wastegate?[/noob]

 

external wastegate dumps the excess exhaust gases to the atmosphere; internal re-routes that gas back into the downpipe and through the exhaust system
-Chris

 

Ah, now I see why they would choose internal if they wanted to be CARB legal.

 

Not completely true

An external can dump either to atmosphere or back into the exhaust path prior to the cat.

 

i figured i'd give him the basic answer
-Chris

 

What are the pros and cons to internal vs external?

 

Requesting for some picture diagrams for the internal and external ( request MS paint ) for some visual understanding.

For the most part it sounds tempting to get this if Greddy can pull it off. Hopefully if all goes well we'll probably see a group buy going on soon?

 

These guys have pictures of internal and external wastegates here.
http://www.atpturbo.com/Merchant2/merchant...tegory_Code=WGT

Both internal and external wastegates can bypass exhaust from before the turbine housing to the air or to the exhaust after the turbine housing.

Internal wastegates are a part of the turbine housing.
External wastegates are a completely separate piece.

Look at the available turbine housings on this link. They show the difference between a turbine housing with an internal wastegate and a turbine housing without an internal wastegate.
http://www.atpturbo.com/Merchant2/merchant...tegory_Code=GRT
This is an internal wastegate turbo. The yellow colored canister is the actuator for the internal wastegate.
http://www.atpturbo.com/Merchant2/merchant...tegory_Code=TBO

Tim

 

Tim you are awsome but I was hoping you'd show us your artistic drawing instead Anyways thanks for the examples!

Jimmy

 

who cares if its carb legal or not, i dont see why i see that in almost every greddy thread, like wuts the big deal, so what if its not carb legal, ppl are runnin arun dhere with race headers that are illegal but u dont hear ppl complain bout those