On-line SU Needle Reference

This On-Line Su Needle reference is design to simplify the job of selecting the right needle for your SU carburetor(s).This resource can hopefully reduce the drudgery and hit-or-miss involved in searching through pages of needle charts.
Of course, no computer program can determine whether your car is running properly. It's up to you to determine what changes are needed in the carburetion, and to make and verify those changes. You will still need the mechanical tools and skills to do this. But whether you use plug readings, dynamometer tests, exhaust sensors, or plain old seat-of-the-pants road testing, hopefully this resource can help you zero in on the needles you need.