Sparkplug, colder heat range
Thread Starter
Joined: Oct 2000
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From: Redmond, WA
Sparkplug, colder heat range
Sorry for the x-post but didn't have much luck in the FI forum. Hoping for more exposure/answer one step out 
Originally Posted by RT' date='Feb 9 2005, 10:16 PM
What's the closest match to the stock NGK but one heat range colder ("8")?
I know people are running Denso IK24's but how about a double platinum NGK in a #8 range instead of an iridium or any other wacky a$$ shiz .......
Stock NGK PFR7G-11S description:
14mm, 3/4" reach, 5/8" hex, gasket seat, resistor, projected tip, extreme long life double platinum, fine point platinum on center electrode, platinum tip laser welded on ground electrode, Stainless steel washer reduces plug self-backing. .044"gap
BTW, search function down
I know people are running Denso IK24's but how about a double platinum NGK in a #8 range instead of an iridium or any other wacky a$$ shiz .......
Stock NGK PFR7G-11S description:
14mm, 3/4" reach, 5/8" hex, gasket seat, resistor, projected tip, extreme long life double platinum, fine point platinum on center electrode, platinum tip laser welded on ground electrode, Stainless steel washer reduces plug self-backing. .044"gap
BTW, search function down
Thread Starter
Joined: Oct 2000
Posts: 14,269
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From: Redmond, WA
Originally Posted by Slows2k' date='Feb 11 2005, 05:21 AM
A non-platinum NGK is a R5672A-8, or NGK Stock # 7173. I Never used a platinum plug with the SC. The copper core plugs are cheaper, and don't have a very hot fine wire electrode.
Thread Starter
Joined: Oct 2000
Posts: 14,269
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From: Redmond, WA
Originally Posted by gernby' date='Feb 11 2005, 05:47 AM
Why do you want Platinum over Iridium? My understanding is that platinum trades performance for longevity when compared to copper, but the iridium adds the performance back in.
maybe later
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From: Mother F'in TN
Originally Posted by RT' date='Feb 11 2005, 11:51 AM
sweet, any problems w/ them not being resistor type?
For price and peformance. Chances are if you are swapping to a colder plug, you'll be pulling them regularly to check them anyway. At the replacement costs of a set of copper cores, why not swap with new every time you check? You can replace them 4x and be $$ ahead over what 1 set of iridiums or platinums cost.
A fresh plug of any type gives better performance than a many thousand mile plug.
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