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I really like the idea of working with what you got. The problem is, the engine is quite old and there have been substantial efficiency upgrades over the years. The weight issue alone is quite important as the 3E-E (current engine) has a cast iron block vs the 1NZ-FE's aluminum block. I could probably drop a good amount of weight right there. The 1NZ-FE only weighs in at 183 lbs. I'm not sure about the 3E-E. The 1NZ-FEs can also be had for less than $300 around these parts. Its hard to rebuild the 3E-E for too much less than that price.
I guess I'm curious what the benefit would be if I changed nothing, but dropped a 1NZ-FE in the Tercel. I realize that the question really isn't answerable. I'm sure it would be a heck of a lot more fun with 107hp vs 82hp, and I bet it would get better mileage too.
Anyway, its mostly a theoretical discussion as I still have to get the car running before I do anything with it.
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