Hmm you have a valid point aaronng, didn't think of that.
according to my calculations (based on prices i have in my pile of receipts) i paid $26 for copper spark plugs vs $108 the previous owner paid for the iridium plugs.
There is also a higher risk of the spark plugs being fouled for some unforseen circumstances too..
Cheers for all the replies. I am thinking of getting everything and doing it all my self. I just refuse to justify the cost.. My gf's dad has always serviced his own cars as long as he uses the manufacturer parts. So I might look at going down this track. I just cant justify the costs that people want to charge me
However would you prefer to have fresh plugs every 20k as opposed to fresh plugs every 100k?
Personally I prefer fresh plugs because I go tracking, I assume because this is in the euro forum, it would probably not apply.
You can just take the plugs out every 10 - 20k and regap them accordingly.
With iridium plugs, the electrode does not wear out. Even after going to the track 5 times, the plugs are still good, gapped and not fouled. This is for a stock car of course, if the car was turbo'd and tuned to run richer, then fouling could be a problem and you would then prefer the plugs to be replaced more often.
Another thing which I thought of was the Euro's direct ignition. I'm not sure if direct ignition works at the same efficiency when using a copper plug compared to iridium. It seems that direct ignition gets spec'd with iridium and previous dizzy set up is spec'd with copper plugs.
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