Spark Plugs - Subaru Enthusiasts Car Club of the Sierras

ArthurS · 2004-06-24, 08:32 AM

I searched and didn't know if we had talked about the different types of spark plugs. I will need to get some new ones for the 30k service and had gone over the basics of the ones available.

So we have the standard (copper I think), then platinum, double-platinum (is this just a gimmick?), and iridium. I think that all of them have a gap at .044?

Quetion is, is it really worth it to spend the ~35$ for Iridiums? What are the stock ones considered? Copper?

Thanks for anyone's input on this.

sperry · 2004-06-24, 08:39 AM

IIRC the benefit of irridium plugs is mostly that they last longer. I read a good tech report somewhere... lemme see if I can find it.

sperry · 2004-06-24, 08:47 AM

Here's some info:

http://www.ngksparkplugs.com/techinf...000&country=US

http://www.spark-plugs.co.uk/pages/t...park_plugs.htm

ArthurS · 2004-06-24, 08:50 AM

Thanks!

sperry · 2004-06-24, 08:51 AM

Quote:

Originally Posted by ArthurS

Thanks!

Neither of those are the site I was think about. I'm still looking for the good one.

ArthurS · 2004-06-24, 09:00 AM

Quote:

Advantages of Iridium spark plug types
Because of the properties of Iridium, the spark plugs centre electrode can be made with a much smaller diameter than with platinum types (usually 0.8mm for NGK and 0.7mm for Denso), Gold or gold palladium and copper/nickel types. This means that spark plugs potential difference is more concentrated and hence less 'spark jump' voltage is required - this can be as much as 5,000 volts less than with standard plug types. Ignition is improved and less strain is placed on the ignition system. Benefits of improved ignition/combustion include better fuel economy, increased power/acceleration and especially better throttle response.

They really make it seem they are worth it over platinum's. Just hard to justify paying almost triple the cost of double platinum's.

sperry · 2004-06-24, 09:07 AM

More:

http://corner-carvers.com/forums/sho...hlight=iridium

2004-06-24, 08:32 AM	#1
ArthurS EJ207 Join Date: Dec 2002 Location: Reno, NV Posts: 3,707 Car: 2011 Chevy Battle Wagon	Spark Plugs I searched and didn't know if we had talked about the different types of spark plugs. I will need to get some new ones for the 30k service and had gone over the basics of the ones available. So we have the standard (copper I think), then platinum, double-platinum (is this just a gimmick?), and iridium. I think that all of them have a gap at .044? Quetion is, is it really worth it to spend the ~35$ for Iridiums? What are the stock ones considered? Copper? Thanks for anyone's input on this. __________________ Captain Murphy: I dub thee Sir Phobos, Knight of Mars, beater of ass. Be a hitter, babe.

2004-06-24, 08:39 AM	#2
sperry The Doink Real Name: Scott Join Date: Nov 2002 Location: Portland, OR Posts: 20,335 Car: '09 OBXT, '02 WRX, '96 Miata Class: PDX/TT-6 The way out is through	IIRC the benefit of irridium plugs is mostly that they last longer. I read a good tech report somewhere... lemme see if I can find it. __________________ Is you is, or is you ain't, my con-stit-u-ints?

2004-06-24, 08:47 AM	#3
sperry The Doink Real Name: Scott Join Date: Nov 2002 Location: Portland, OR Posts: 20,335 Car: '09 OBXT, '02 WRX, '96 Miata Class: PDX/TT-6 The way out is through	Here's some info: http://www.ngksparkplugs.com/techinf...000&country=US http://www.spark-plugs.co.uk/pages/t...park_plugs.htm __________________ Is you is, or is you ain't, my con-stit-u-ints?

2004-06-24, 08:50 AM	#4
ArthurS EJ207 Join Date: Dec 2002 Location: Reno, NV Posts: 3,707 Car: 2011 Chevy Battle Wagon	Thanks! __________________ Captain Murphy: I dub thee Sir Phobos, Knight of Mars, beater of ass. Be a hitter, babe.

2004-06-24, 09:07 AM	#7
sperry The Doink Real Name: Scott Join Date: Nov 2002 Location: Portland, OR Posts: 20,335 Car: '09 OBXT, '02 WRX, '96 Miata Class: PDX/TT-6 The way out is through	More: http://corner-carvers.com/forums/sho...hlight=iridium __________________ Is you is, or is you ain't, my con-stit-u-ints?

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