I wouldnt trust the JET ECU for many reasons. I had a small debate with the guy that has one on planetisuzoo about these things, and I still have yet to see proof the JET ECU made any gains.
I'd highly recommend trying out a piggyback system, something like the AEM FIC (fuel ignition controller). That will give you the best results.
http://forum.planetisuzoo.com/viewto...5fcc1dc21c27a5