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how to properly brake in engine after rebuild?

Engine Building Fundamentals

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i just want to ask how to properly break in engine. i have a 2003 VW jetta that i will be rebuilding soon from con rods, pistons, bearings, valve, cams, lifters, etc.. etc.. and my question is, is it safe to run with the bigger injector and a turbo while breaking in an the engine for 50 miles without damaging the engine due to air/fuel ratio.

-with the build im going for 550cc injector and a F23T hybrid turbo just a little bigger than my stock ko3 turbo.

Here's a webinar on engine break in procedures:

https://www.hpacademy.com/previous-webinars/229-engine-break-in-myths-dispelled/