Details of your setup (turbo, fuel system, management etc.)????
If you have at least attempted to upgrade your fuel system in a logical way, I would go to a dyno equipped with a wideband O2 sensor and do some pulls to make sure your A/F ratio is safe. Based on the details of your setup and the results of the pulls, then you can figure what to do.
In my neck of the woods an SCT chip is going for $325 plus $100 an hour for dyno tuning with that chip. That still requires that you have a proper fuel system. Once you have the chip, you can go back for tuning at the $100/hr rate when you make changes. That actually makes alot of sense (I too wanted to save money and did not get a chip, I just used the equipment in my signature and had the A/F verified). Sometimes, you can get in a situation where you fuss so much with trying to get stuff to work that buying a chip would have been cheaper in the first place!
97 Laser Red GT-248A Wingless model, Built Lincoln Mark VIII motor-Procharger D1SC, 3 core IC
2012 Black GT-Saddle, 3.73s, Brembos, Shaker1000