luvmy280zxt Posted August 15, 2008 Share Posted August 15, 2008 I have an 81 zxt which was an auto. I put a 5 spped in it and was wondering if i need to swap out the ecu? If i do which one do i need to use 82, 83?? thanx Quote Link to comment Share on other sites More sharing options...
jtmny1999 Posted August 15, 2008 Share Posted August 15, 2008 nope Quote Link to comment Share on other sites More sharing options...
phil280zxt Posted August 17, 2008 Share Posted August 17, 2008 Any of the turbo 5 speed ECU's will work in your 81. The main difference between the manual and 5 speed that I noticed was the rate the RPM's fall off between shifts. The 5 speed ECU will let the RPM's fall off slower, making for smoother shifts while tooling around town. Quote Link to comment Share on other sites More sharing options...
jayzrocket Posted August 17, 2008 Share Posted August 17, 2008 I was told that the auto ecu in a five speed have a few differnt parameters. For instance at a stop light the rpm's stay up, at a idle, a little more than the manual because the auto ecu is designed to always have some kind of load on it while it is in drive. I think that may be the most noticable though. I did this w/ one of my zxt's, also seemed to run a little rich too. Quote Link to comment Share on other sites More sharing options...
turbobluestreak Posted August 18, 2008 Share Posted August 18, 2008 I think you should swap ecu's to an 84-89 300zxt not because of the tranny being used but because 84 and up you can convert to a MAS to get rid of the nasty AFM. tbs Quote Link to comment Share on other sites More sharing options...
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