by Mark » Fri Jul 29, 2016 4:28 pm
Taking baby steps is what you need to remember. Honestly the slower you go, the more success you'll have. I'm from the UK so am not familiar with all of the makes and models available in the US, however I know a lot of euro cars are on sale there. If I were you, and you want to start writing your own files I would buy yourself a master tool, not a slave to another company. You'd only have to upgrade a slave anyway. Master tools allow uncoded .bin files to be written. Slave tools require the .bin to be encoded by the master before the tool will write them. Effectively stopping you writing your own files on a slave. They have to be encoded to the tool first.
CMD, Alientech Kess (OBD) and Ktag (for bench tuning), Magpro and FGTech are all tools that are readily available to buy online and will cover the vast majority of cars.
I have been going for 5 years, and I use Alientech Kess and Ktag on a daily basis and have only had one issue and that was on a very new tuning protocol and their tech support were straight onto it for me.
Your mileage may vary though depending on the tools coverage for the US market, they're generally more geared around the EU stuff. Buy what will suit what you want to tune but check out the coverage of each tool first. It'll be available on the manufacturers websites.
Once you have your tools and you can read and write to the ECU, you will need software to modify the files. Again I can only speak from an EU perspective but tools such as WinOLS, TunerPro, Swiftec and ECM Titanium are available all at a variety of price points. Some software helps you more than others at identifying maps, some like WinOLS you're on your own. Speak to local tuning firms around you and explain you're looking to start up writing your own files and do they offer any courses as an introduction to it. There's a few companies in the UK that do this. Don't be afraid of buying in files to begin with too. Have a search around for companies that will provide you with tunes for a cost. Because you'll have a master tool, you'll be able to compare between the stock and modified files to see the differences made. I've had a brand new 3000 mile old Audi S1 in this morning, this is not something I'd want to experiment on so I bought a file from a tuner in The Netherlands that I've used before because they've worked on them in the past with very good results.
Know your strengths and weaknesses, that is the key. Do not be afraid to say no. Better to say no to someone than have to pick up the pieces afterwards if you're doing something you're not sure on.