I am looking to get HEI plugs for a 1959 235 engine.
I didn't even know there was an HEI plug. I thought you just used spark plugs. I have bought HEI Dizzy's at swap meets for $5 and put them in (v8's) and nothing changed except no points to worry about and simple wiring.
Here is what you get with large gap:
The potential to fire a leaner mixture.
The potential to fire with a higher compression engine.
If you don't need it, you really don't get anything.
Here's what you may get with large gap:
Hard starting
Burn up caps and rotors quicker.
If you cause the plug tip to get too hot, it may cause pre-ignition and blow up your motor.
The HEI bigger gap was to operate leaner mixtures in the beginning of the emissions era. Not Stovebolts, not pre 73 motors. I use them because they last forever, no other reason. I use the recommended plug and gap for the motor.
Deve does get a bit lost in details when details are not necessary. He studies the entire internet and then asks here, like he really wants to know. It's just Deve's method, he's a good guy.
Jerry gets sucked in once a year. When he says "why does an HEI need a wider gap" He is not asking you, He means: "Why the hell does it need a wider gap". I think he may have more experience and knowledge than those other names. A great resource for us.
I think this is the nicest post I've ever done!
OOps wait...Carl, women's cage fighting analogy? really?
