Spark plugs for FI application?
07-21-2005, 02:54 AM
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Spark plugs for FI application?
I'm assuming since my APS TT kit didn't come with spark plugs that the stockers are just fine. Only problem is my stockers already have almost 40K miles on them and I'd like to replace them.
Should I just get a set of stock replacement platinums or go with something else? Maybe a cooler heat range? What spark plus are the rest of you guy running with FI?
Should I just get a set of stock replacement platinums or go with something else? Maybe a cooler heat range? What spark plus are the rest of you guy running with FI?
07-21-2005, 04:05 AM
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07-21-2005, 05:10 AM
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I've run both copper and iridium since going FI (both 1-step colder). Absolutely no difference in performance or longevity. Buy what you want, but IMO no point in spending extra on iridium. Definitely go 1-step colder, tho.
07-21-2005, 06:57 AM
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We've always run the NGK Iridum one step colder than stock. No complaints at all. Iridium tends to hold up to heat better than coopers as well.
We always carry about 10 sets in stock: http://www.forgedinternals.com/store...cat=264&page=1
We always carry about 10 sets in stock: http://www.forgedinternals.com/store...cat=264&page=1
07-21-2005, 08:12 AM
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One step colder is for additional safety.
The APS manual states to use one step colder plugs for my environment. I will do what they say since they engineered the thing. I got my Iridiums from Sharif.
The APS manual states to use one step colder plugs for my environment. I will do what they say since they engineered the thing. I got my Iridiums from Sharif.
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07-21-2005, 08:34 AM
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Originally Posted by xxlbeerZ
One step colder is for additional safety.
The APS manual states to use one step colder plugs for my environment. I will do what they say since they engineered the thing. I got my Iridiums from Sharif.
The APS manual states to use one step colder plugs for my environment. I will do what they say since they engineered the thing. I got my Iridiums from Sharif.
07-21-2005, 12:24 PM
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Originally Posted by taurran
Yup, Im using the NGK Iridium 1-step's as well.
07-21-2005, 12:54 PM
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Originally Posted by zero2prove
I do not believe these plugs can be found in copper or even platinum. I've looked and looked.
Tuan
Tuan
A search on this forum should yield the correct NGK Copper plug part #. I'll try to remember to post it after I get home tonight.
07-21-2005, 04:14 PM
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LFR6A-11 is the part number for the copper plugs. I was thinking in the 7 heat range 
. They don't make copper in the 7 
. I didn't think about the heat range numbers when I made the original post. Now if someone can find me double platinums for the Z in the 7 heat range that would be great!
Tuan
. They don't make copper in the 7 . I didn't think about the heat range numbers when I made the original post. Now if someone can find me double platinums for the Z in the 7 heat range that would be great!Tuan
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