Hi Everyone,
The more I drive my S3 the more I just want to tune it. Originally I wanted to go with APR but their lack of ability to flash back to stock from your own PC is what killed that option for me. I have done some research and it seems like Unitronic is the way to go. Despite my best efforts I can only find a couple of reviews of the Unitronic ecu tunes, one of which is mostly in regards to stage 2. From the little I could find it seems like Unitronic is a "safe" tune that has a smoother stock feel to it. I am a couple months from pulling the trigger on my purchase and before I do I was curious to see if anyone else has experience with the Unitronic ECU and TCU tune. I was tempted with the stage 2 tune because if you buy a stage 2 tune it gives you access to stage 1 and stage 1 +, but I feel like stage 1+ is where I want to be. It gives good gains, no down pipe is required, and it should pass emissions in the USA aside from CA I think. Naturally if I get the Stage 1+ I will also acquire the stage 1 tcu tune. My main priorities from the ecu and tcu tune are listed in order of importance below:
1. Reliability.
2. Drive-ability/smoothness
3. Performance
I am aware that my Audi dealership will basically void my power train warranty on this but I am hoping I can avoid a TD1 by the revert to 100% stock on this. I called Unitronic and they confirmed that you can go 100% back to stock from your PC. Given that this is my daily driver, I want to maintain as much reliability as possible and if my reliability in a couple years will go down the drain then I would just prefer to avoid a tune all together. If it makes any difference I have a 2015 S3 with the performance pack and it has about 16K miles on it bone stock. I am hoping to not get flamed for this post as I did do some research and any input is appreciated. My end goal is to get noticeable gains in performance, a smoother drive and eliminate that annoying bottom end lag.
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