Extended tip spark plugs?

[blueroo]

Some friends and I are going up to Altoona soon and I plan on giving the car a tune-up before hand. On my list is new plugs. The handbook mentions extended tip spark plugs and I was wondering if anyone using these had part numbers for them?

 

[wsa111]

Accel-348 is the least expensive.

Champion RF14YC is also a great plug.

Autolite AP-46, which is is a single platinium plug, double plats are APP-46,

The plug i like is NGK IRIDIUM IX WR51X stock #7510.

The NGK plug is the latest in technology, it has a pin center electrode which requires less voltage to fire & the center electrode is iridium which will last 100,000 miles in a engine in good shape.

Your choice, let your pocketbook be your guide. William

 

[blueroo]

As for the platinum and iridium plugs, I've been told that those and carbs don't get along too well. How true is that?

 

[falcon fanatic]

I don't know of any conflicts between those plugs and carbs, except for the possibility that any spark plug will probably last longer on an injected car which has a more carefully measured mixture, than on a carbed car. Just my theory. I seem to recall some people on here having the plug tips disintegrate in their cars, though. I'm not sure that was so much a carb problem as a tuning problem.

As for those plugs being designed to fire better, you'll see most of a performance advantage on cars with weak ignition systems. On cars with a powerful ignition system, those advantages are minimized. The long life, however, is very nice to have.

 

[blueroo]

Ok, got the plugs today. The guy behind the counter looked at me a bit strange when I ordered a clutch for a six cylinder and then asked for ten spark plugs...but they're all indexed now. Next step is to take each plug out and gap them.

I got Autolite 46 plugs. They didn't look any longer than the Bosch Supers I had installed, but who knows, maybe the Bosch Supers were also extended tip plugs.

 

[73GreenMachine]

Here in Australia they don't list platinum plugs for the pre crossflow inline sixes (well at least not in the Bosch or NGK catalogs). The spark plug threads between Aussie and US heads are the same aren't they(meaning that those plug codes should order me platinum plugs)?

 

[addo]

Threads are the same, part codes vary between countries. :x

 

[73GreenMachine]

Threads are the same, part codes vary between countries. :x

That really sucks! You would think a mulitnational company would standardise their part codes to make life easy for themselves, and everyone else! D