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I just finished an rb25det neo swap into my 240z. According to the people i spoke to, the rb ecu is the best bet because it retains the variable valve timing function. I dont believe the z32 ecu will control that function. As far as tunabilaty goes, im running a 2000 rb25 engine out Of a second generation Stagea (kind of like a skyline station wagon). According to nistune, the first gen stagea ecu can not be modified using ine of there daughter boards. The second gen unit like i have can be modded. Another thing to keep an eye on. Good luck with your project, i barely finished mine, so i dont have enough miles on it to give a really goox review, but in this short time ive had it running, i absolutely love it.
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