Most V8 engines have eight spark plugs, one per cylinder. However, some V8 engines, particularly those with a twin spark or dual ignition system, have two spark plugs per cylinder, totaling sixteen spark plugs. This design is common in modern Chrysler HEMI V8 engines and some Ford 6.2-liter V8s, where the dual spark plugs improve combustion efficiency and allow for larger valves
. To summarize:
- Standard V8 engine: 8 spark plugs (one per cylinder)
- Twin spark or dual ignition V8 engine (e.g., modern HEMI): 16 spark plugs (two per cylinder)
If you are unsure which type your engine has, you can check your owner's manual or visually inspect the engine for spark plug wires or coil packs- counting more than eight indicates a twin spark setup
