Well I've come to the point that I don't like running mystery tune. Let me explain.... When I first got my car it came with a APR tune, but fast forward a few years that ECU died so I bought a ECU with a MTM tune. The seller had no idea what stage the tune was so I've been risking it for the last 4-5 years. Just recently I bought a ECU with a APR Stage 2 tune off of eBay, but after going to my local APR dealer no APR program was found, the ECU was tuned, but again we have no idea with what. The eBay seller which was a very cool guy said he bought the ECU from eBay and just assumed it was a APR tune. I trust the guy so I hold nothing against him. I have a spare ECU so I can't go wrong with that. I figure I would try something new and saw a great review of "Motoza". Nearly half the price of other tuners, is loaded remotely, and can but customized like coding our O2.
So I've been emailing them tons of question this week and so far they have been nothing but fast and extremely helpful. I purchased the Stage 1 tune to give them a try. They required me to list all my customization I've done to my S4 before they build the tune file which I find very cool. No longer will I be running a one size fits all tune but one that optimized to my S4. I should be getting a cable and software this week to load the tune. Once that is done we start collecting logs so that the tune can be optimized even more. It is nearly the same process of doing custom tune at your local tuner minus the dyno. They offer multi-tune option if I want to switch from 91 to 93 oct, which is similar to the APR. I'll properly upgrade to that if all goes well. What I'm most impressed with, is that I can upgrade to there next stage and it only cost $40, but I would need to upgrade my fuel injectors. All in all, I'm pretty excited about this and look forward to "feeling" the results. I'll post a full review later this month once everything is installed and optimized.