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if your looking for a cheap way to lower the compression ratio, then you shouldn't be getting any machine work done to the pistons, because it will probably cost a lot and not be nearly reliable as forged ones. What about the stock kia sportage pistons? i think they bring the c/r down a bit and require no modification. I actually threw a set out to put my forged ones in. F2t's have been known to crack ring lands under high boost, so if you plan on making a lot of power, then don't even bother. and in my opinion if your not going to be making a lot of power with your fe3, then don't bother building it and stick with the f2t. Also you better know how to tune, or know someone that does because f2/f2t won't take much abuse from a mistune.
now I know direct replacement forged fe3 pistons aren't cheap, but there are other options out there, besides machining stock pistons. I don't know for sure on how close a fit but like someone mentioned you can use
3S-GTE pistons and i think 4g63 pistons fit to and they are cheap to come by,even forged ones.
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