Originally Posted by
xd_01
You could but it won't be as easy or cheap as you think. I personally don't like the fact that the evo 4 runs from 96 to 98 so you don't know what it's life has been like roughly for 19 to 21 years and if it does run fine how much longer will it run fine for. So in the end your Sonata head build might not be as expensive as you think.
Also there some Suttle differences between the jdm and usdm versions that will catch you by surprise like the water neck is different and I believe it has Anti-lag. Again it will cost more money and headache sourcing the jdm parts or converting to usdm parts. Not a big deal but won't save money neither. You'll have to covert to an evo p/s pump also since the pulleys are different between the 8g and evo.
Switching ecu's and harnesses isn't an easy task and will be the hardest part. This is where the Sonata swap becomes more ideal, not as much wiring and plenty of people have done it so finding guidance (ask them nicely) will be much easier where as I can't think of anybody who swapped an evo harness and ecu that could help. It would require splicing it into the end existing dash panel harness and fuse box. The only person I can think of who swapped harnesses and ecu is Amuru, but I'm pretty sure he's an actual Mercedes Tech so he's more then qualified for the task, although he swapped from v6 to i4 not an evo but it's same work.
So basically cheaper doesn't mean easier, and cheaper usually gets expensive. If you go that route don't beat the crap out it, take care of it and it will last. But we all know that's not gonna happen lol. I know how it is.
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