Read the tuning bible at the top of this section. That will give you the basics and then trialand error and find someone at your local track that knows how to tune them and ask for help. Watch him close see what he does and most important look and listen to how the engine performs. It took me about 18 months before I could tune them pretty consistently and even now sometimes when it gives me problems I return the high and low back to stock/ factory settings and start over. That's how I learned.