Quote:
Originally Posted by ichitaka05
You can... but for how much R&D Subaru tested on FA20DIT vs aftermarket, IDK
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The biggest thing is DIT. Piston tops matched perfectly to the combustion chamber all for best DI performance under boost.
I think if AVO+FA20 = OEM reliability Subaru wouldn't have redesigned the heads and pistons. JMHO. The OEMs have a lot of tools available to them. Avo does have a great track record though and its going to be much less expensive, the tuning is very critical.
The way to do this swap would be to keep your FA20 block/crank and replace the pistons, heads, DI, and ECU. It will be interesting to see if many 2015 WRX owners sell their engines for builds. Maybe we'll get lucky and all the 2015 WRX geeks will hate the DI and swap to FB's
