I have a 'standard' '90 J'spec, TT.

 

60K service coming up, I've got all the bits but I'd like to replace the plugs too.

 

I've seen/read a lot about different temp and reach of plug. Can I please have some recommendations and prices.

 

Ta guyz

 

Tim

Hi Tim,

 

About three months ago I replaced my plugs with NGK PRF6-11B from Courtesy Nissan ($55 + shipping and VAT/Duty). Haven't had a problem with them until now (touch wood) eventhough I was told by a few people on the forum that they've experienced burning them quickly. As for what Nissan UK advices, NGK PRF6-11C, it's a good plug and I know many Zeds that run them without a problem (plus they are easy to get hold of in the UK - even Harry sells them). As far as I know, the -11B plugs are slightly longer than the -11C plugs which means that the spark sits deeper in the mixture. If I remember correctly you haven't introduced a lot of mods to your engine (boost wise) so you could very safely run the -11C plugs from Nissan.

 

Hope this helps.

 

Cheers mate,

 

Danny

There was some dyno testing done recently in Aust on a J-Spec Z to compare the 2 plugs and whilts I have not seen the Dyno sheets myself they do come from a reliable source.

 

The results were unfavorable on the PRF 6B-11B plugs

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