that makes since, the fs-de (120hp) is the us protege motor and the fs-ze (170hp) is the jdm motor from what i've read. n/a hp
The main difference between the FS-DE and ZE are the higher comp pistons, more aggressive cams, and perhaps one other difference besides the ECU, which is where the majority of the extra power is made. The problem is, no one has really been successful in getting it to all work together (mainly because the a-spec wiring harness is different than the j-spec). There are maybe 2-3 people that have done it, but they all said it wasn't worth the work. It does look promising, though: the power of the MSP without the turbo headache.. But in reality, it's not so easy.
Evan, I think some guys get KLZE's from TigerJDM or whatever that place is called. I think it's in Canada. The thing that makes me a little leery is that they have pictures of rows and rows of engines just sitting, perhaps indefinitely, until someone buys them. The warrantee is nice, but I'm sure as you know, sometimes getting a company to honor it is more hassle than it's worth.
If you're going to use an engine importer, make sure to have them take off the valve covers and check the stamped numbers and stuff on the cams to make sure you're getting the engine you're paying for. I forget what letters are which engine, but there's a difference. And then it gets even more confusing when some of the KLZE's had curved neck intake manis, or the long neck intake mani, and then the Milly motor was different, and it gets to be a mess.
Here's a quick run-down of the differences between the motors, although it's not complete. What's worse is that each engine has its advantages, and they're all different, so to get the best motor, you have to build one with parts from all three...
http://www.mazda626.net/topic/37114-klde-vs-klg4-vs-klze/
So there, Evan, I made
another informative post. I think I'm up to two now!