nicknack25

Hello everyone, what’s the second smaller hole on the exhaust side? It looks like there could be an internal wastegate but nowhere to put it?

I'm not using this turbo, i was just wondering.






This is the second one I have and it doesn’t have that hole.

ls joker

You need start with measuring the inducer and exducer for the compressor and turbine wheels. That will be a good start and more benefical information to have.

nicknack25

Appreciate your response but I won’t be using this turbo anymore because it doesn’t fit right with my set up. I was just wondering what that extra hole was for

JRCivic1

It is for an internal wastegate. The exhaust housing is a cheap Chinese product and the manufacturer likely uses the same casting for both internal and external wastegates.