A direct bolt in, 1961 to 1965 389 ci, Pontiac including the Pontiac Tempest.
all pontiac engines were blueish green, never ever remember seeing any red engines, someone must have repainted it.
Factory stock ignition timing for the Corvette 327 ci 350 HP is 4 degrees BTDC.
6 degrees before top dead center
Ignition lag is the time delay between the start of injection and the start of combustion in a compression ignition (CI) engine. A longer ignition lag can lead to the premature autoignition of the fuel-air mixture, causing knocking. Proper control of ignition lag through fuel injection timing is crucial in preventing knocking in CI engines.
400 ci spark plug r-46ts spark plug gap .040 point dwell 28 to 32 point gap .016 ignition timing 12b fuel pump pressure 5 to 6 1/2 idle speed 650
compression ignition
compression ignition
Changing the ignition timing on a Ford 240 CI engine can significantly affect its performance and efficiency. Advancing the timing can lead to increased power and better throttle response, but may also cause engine knocking if set too far. Conversely, retarding the timing may improve fuel economy and reduce knocking but can result in a loss of power and higher emissions. Proper tuning is essential to achieve the best balance between performance and efficiency.
1955
An SI engine ignites the fuel with a spark (SI = Spark Ignition) whereas the CI engine ignites the fuel with heat generated from compression (CI = compression ignition)
Combustion ignition engine