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Originally Posted by ps2fixer
The corolla's I worked with are 4A/7A engines. I do have a corolla with a stick trans in it too with a bad engine. It almost sounds like there's a fair chance the trans wouldn't be too hard to be a backup for the Echo. No clue about spline counts and such, I suspect the mounts are similar or not hard to make something up.
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Gotta have to check if the bolt pattern is the same between the Japanese ones, which were fitted with the 1NZ-FE, and the Chinese ones which were fitted with some A-series engines.
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Reading a bit about the 1NZ-FE, I guess it's based on the 1NZ-FXE which is a lower power output, but high compression mechanically, but valve timing is simulated to 9.5:1 ratio type of engine. I heard those can be very efficient. Wiki claims the peak thermal efficiency is around 37%. Another google search says typical diesels peak at around 42%, so that's quite impressive. It almost makes me want to find one of those engines and do an engine swap lol. ~75hp vs 108hp wouldn't be the end of the world or anything. 25% or so lower power, but say 20% better mpg under the same conditions could be worth it.
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Don't forget the 1NZ-FXE was meant for hybrids, and it also had a lower torque output (slightly over 20% lower).