I have a chance to buy a Holley term x for ls .....for challenge price. I have never used one and nobody I know would use them. It was taken out and replaced with a fi tech 550.....because he said it doesn't have good enough tuning capabilities. Who has used the term x and what is your opinion or issues with it.
Buy it and if you don't want it sell it to me.
That being said it's incredibly easy to setup and install provided you follow the instructions. The tuning software is incredibly user friendly and there is a ton of support for base tunes through the Sloppy Mechanics community and a few of us on here. I have a Terminator X Max on my Ram50 to run a naturally aspirated 5.3 with a big cam and a DBW throttle body. The only real downsides to the TermX is the limited inputs/outputs and the single Bosch 4.9 O2 sensor support. The wiring harness specifics trip some people up and are a complaint from a lot of the mouth breathers on the TermX facebook groups. But if you can get one for a price that would fit a challenge budget you should be able to make it work for your engine/injectors or switch out what you need to.
I will say the "self tuning" is a bit of a marketing misnomer and it really just has pretty decent closed loop fuel control with the wideband. It does not self tune spark, you have to setup a spark table yourself, make sure you have the correct injector data and have some idea of what your target AFR should be at given points but if you can do that the software will help you establish a drivable VE map for fueling.
RacetruckRon said:The only real downsides to the TermX is...the single Bosch 4.9 O2 sensor support.
Define "downside"... 
By all means, it's not a Bosch Motorsports/Motec, but for the average enthusiast, it's "perfect".
The harness is rather "tight" to get to some sensor connections, but it works.
As far as the self tuning, it's a bit "stiff" initially, but the longer you drive it with the self tune, the better the program becomes. Too many expect dead nuts right on never have to change it within 5 minutes of idling after imputing all the wrong values into the handheld...
As to the actual tune you can make yourself, the software is largely the same between the term X and the hp/dominator version. Holley is not dumb in reinventing the wheel here.
To me there is nothing wrong with the lsu o2 sensor... it sure is better to torch a $150 sensor vs the $300 one for a dominator. Just don't leave the key on as the heater circuit is always on and when the "cold" gases come down the pipe, poof, burnt up.
Holley always seems to get a bad rep, but they are about the most complete OOB system going for stupid cheap money. Of course it could be better for the precieved value, but then you'd be paying even more.
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