The cheapest way to the championship...

Tune to Win -
Chassis fundamentals
Drive to Win -
Racing fundamentals
Prepare to Win -
Prep your car for speed and reliability
Engineer to Win -
Solve your racing problems the right way
Nuts, Bolts, Fasteners, and Plumbing Handbook -
the right bits needed, and why
Engineer in Your Pocket -
the quick reference for debriefs