Power gain claims from this are pure BS.
Steadier power curve (not higher) on cars with subject grounds I can believe.
However car designs are so well grounded today.
You can easily see at least 3 individual main grounding wires in our engine bay alone. The coil pack has it's own even.
Also explain how adding more grounding straps makes the engine produce more power?
The ignition doesn't transfer XX extra implied volts of firing power to create greater cylinder pressures.