How do I use it?
Using WinSU is very simple. You enter your car's details, and then select the carburettors you are using, your car's type of engine, gearbox, and wheel/tyre size.
Then you select the detailed engine specification, chosing things like air filter type, ignition system, camshaft, etc etc.
WinSU will then suggest the most suitable needle for your engine* , and give performance estimates such as power, torque, 0-60mph time, etc.
The technical library contains dimension data on over 700 needles. Users can view these dimensions in mm or inches, and plot the profile graphically on a graph. Up to 8 needle profiles can be overlaid on the graph in different colours.
If you already know your current needle then you can search for similar needles* which are, for example, slightly richer at the top end, or slightly leaner in the mid range.
The project can be saved and easily loaded in again in the future. WinSU contains a full help system, as well as optional settings for metric/imperial units for distance/weight/speed/power.