Spark Plugs?

**kristrifo** · 06-02-2013 06:38 PM

just recently got my 100k service done, i paid $140 from honda for Denso iridium spark plugs and got my mate to install them for me

**aaronng** · 06-02-2013 08:19 PM

Originally Posted by curtis265

Why not use copper plugs and replace them more frequently?

Cost of changing plugs every 20k could end up being higher than iridiums lasting 100k.

**curtis265** · 06-02-2013 08:46 PM

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..

**Stayxtrue** · 07-02-2013 12:19 PM

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

**ChaosMaster** · 07-02-2013 07:34 PM

Ice ignition leads.... interesting. Anyone tried them?

**fillit** · 07-02-2013 08:09 PM

Originally Posted by aaronng

Cost of changing plugs every 20k could end up being higher than iridiums lasting 100k.

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.

**aaronng** · 08-02-2013 05:27 AM

Originally Posted by fillit

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.