Spark plug which one has the highest conductivity?

I have heard that copper has higher conductivity then platinum or iridium spark plugs ,,is this true?

 

It probably does but that doesn't make it better than the platinum/iridium tipped plugs. Those metals are much harder than copper so you can manufacturer the plugs with a smaller surface area and thus concentrate the spark better and thus making it stronger.

 

well as i understand form doing some brief research. Manufacturers preffer Platinum and Iridium not because of performance but for longetivity.
I am wrong here?

 

I believe you are correct!

 

So copper will perform better but will have to be gapped over time..
Cheaper plug and better performance?
ANyone have any data on what pro guys preffer at the strip?

 

bump

 

copper plugs only last a year, so if you are willing to replace them often, then they are cheaper and better performing than platinum plugs

 

very interesting info...I dont mind replacing them once a year to gain a hp or two. Plus gas mileage might get better too right?

 

copper all the way.

 

Here are picks of a brand bew NGK V-Power plug for our cars. I have some sitting in my garage for my next plug change. There are 1 heat range cooler than stock....stock gap though.
Part # is: LFR6A-11

the part number for the iridiums of the same size and heat range are: LFR6AIX-11

 

how much are those?

 

I don't recall exactly.....I think they are about $5 per plug.