External wastegate

Asked by Wrx14 Jul 21, 2016 at 01:31 PM about the 2014 Subaru Impreza WRX Limited

Question type: General

I am in the process of doing an external
waste gate with an up pipe and dump tube
swap. I've heard that you need to get a pro
tune when you do this. Why is that? Would
you be able to not get the tune and still be
able to drive the car without any CEL?

3 Answers

GuruC3H11 answered 5 years ago

Drivable. Yes. The fear is about over boosting. Your engine might not understand the new parameters you've install. So it might squirt fuel like ussual. With a new wastegate you could be running higher boost. You engine can go lean (more air, less fuel). It causes engine to blow up.

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