The way that researching in Neocron works, is that you need at least the same amount of skill points in the researching skill as the tech level of what you're trying to research, but until you have double the tech level in research there is always a possibility of failing the research. The more research you have, the less chance of failing.
For example, if you're trying to research a TL90 item, you need to have at least 90 skill points in researching, but require 180 or more before you're guaranteed not to fail the researching process. The possibly outcomes of failure range from simply 'failing', to destroying the item you were trying to research, so it's always better to have as much researching as possible.
There is a good item database over at techhaven.org which contains detail on every item in the game and where you can get it from.
Specifically for researching, there are the following implants:
- Tech Haven CPU: +9.91 research
- Special Sciences CPU: +7.86 research
- Area MC5 Hawking CPU: +10.45 research
- Advanced Nerves v1: +2.4 research
- Advanced Nerves v2: +4.13 research
- Advanced Nerves v3: +5.92 research
- Machina Research Glove: +13.92 research
This means that with the best available implants in the game, it is possible to get +48.06 to your research from implants. In addition to implants there is a drug called 'Blue Fairy' available from the Black Dragon Faction Supply Manager which adds an additional +9.06 research for five minutes.
For more information on researching, there is a guide to being a researcher on the techhaven.org website.