Ignition timing is easily the single most important tuning adjustment on an internal-combustion engine, yet the concept of ignition curves continues to be elusive for many enthusiasts. All it takes to ...

Last month we took a '65 Mustang with a 225hp, 289 4V and did some minor engine tuning to see what kind of performance improvements we could make. After some work on the ignition, the spark plugs, and ...

Maintaining idle stability as cam duration increases mandates progressively more carburetor throttle-blade opening (via the idle mixture screws) to compensate for the reduction in cylinder pressure ...