difference between w7cc and w7ac

[innocenti]

hi i live in the uk and have a 2litre fi 78 westy looking to replace the plugs and was steered towards changing to w7cc from w8cc . have asked here at my local stockist of bosche plugs i was given w7ac instead not the w7cc id asked for appear to be a shorter reach plug . and was told they do not do w7cc only w7ac ???? will the short reach still work ok or not ??? cheers steve

[Randy in Maine]

[kookrod]

The place you get your plugs from is not giving you the strait poop! They still "do" w7cc plugs because I just installed some in my bus. (the heads on my type 1 style motor takes the long reach plugs.) They should be plentiful. Maybe that's all they had in stock and just wanted to sell you what was on the shelf. As you can see by the above chart that W= thread size and pitch. 7= the heat range. The first C= the thread reach.(Long) the second C= copper core electrode. on my last tune up (3 weeks ago.) I replaced the w8cc plug with w7cc plugs. I feel my bus runs better with the cooler plug. (My opinion.) Don't use the short reach plug if your motor does not require them. Go get your money back if you can. Or the correct plugs.

[VWGirl]

Thanks for that info randy I am looking to mismatch the sparkplugs in my bug as i need short ones on one side and long ones on the other (LONG STORY)

someday my engine will be correct again...
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Without love in the dream it will never come true

[innocenti]

thats a good bit of info on that cheers . ill ask about a swap but might not be worth the hassle ill just try get them somewhere else.