I run a LinkPlus G3 on my skyline,
and Autronic smc on my 280Z.
I LOVE the LinkPlus, it has
- easy to understand software
- plug and play installation, the map-sensor connects to the maf wiring
- has plenty of extra in and out connections,
meaning, if I want an extra function, it is ready for it. (boostcontrol etc)
- sequential, if that means something for anybody
and a lot of other things.
I also have a "displayLink", it logs everything, and shows ALL data from the ecu.
The Autronic smc is old now, but runs my Z perfect.
It does not have much extra functions, and the software is not too good.
But, it does have perfect control on my engine.
I would never even think of piggy back.
Too much work, for too little engine control, waste of money.
I would advice people who want a new ecu,
to spend a lot of time on the net,
see whats available,
look for pricing (not the most important thing!!!).
And think of who has to do the mapping.
If you have someone other to do it, ask what system they know,
if you are doing it self, download some software and see if you understand it,
and if it`s easy to work with.
And, if you think of adding more to your car later,
can the ecu handle it.