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Re: what is spark plug gap for?
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Posted by Skytown Mark on May 29, 2002 at 15:00:07 from (24.161.5.83):
In Reply to: what is spark plug gap for? posted by bob on May 29, 2002 at 13:22:43:
On weaker or stock ignitions, opening up the gap CAN increase the spark kernel size, thereby creating a more efficient burn. The problem lies in that any added gap creates more strain on the other ignition parts. Coils may not have enough stored energy to fire, or in the least case, not enough energy to cross the gap, creating a miss-fire.
Plug wires will break down due to the added resistance as the spark tries to reach ground.
Rotor and Cap, as well as points, and the carbon bushing in the center of the distributor cap will show early failures.
All of this is because the greater the gap and the higher the voltage requirement to jump the gap. Do not forget the gap between the rotor arm to the distributor cap too. A high performance rotor is a bit longer at the tip, allowing less spark loss or chance of spark scatter in the cap as the spark attempts to jump the plug gap.
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