New here, decided to buy an 08 mazda 6i. Its got 47,000 miles and im enjoying the car. Future plans are to slap on the mazda speed 6 turbo kit and thats about it. Im just here to learn mainly.
Welcome and good luck with the build, it's not that easy from what I've heard. And no, they are not the exact same engine. The MS6 is direct injection while regular 2.3's are port injection. Theres a lot more stuff down the road but Mazda didn't just slap a k04 on the 4 banger and call it a day lol.
If you do go through with the process, do post pics and keep us updated. Welcome again to the family.
the internals are different as well. cant put alot of psi to them. probably a good idea to use a bigger turbo with more volume rather than cramming psi down the throat of the 6i 2.3l. im not really shooting for much power thats why im just going with the mazda speed 6 setup with around 8psi