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Old 12-07-2012, 09:50 AM   #1
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Thinking about going to a cooler plug

Coming up on 45K in mileage and looking at a spark plug change to go one step cooler (level 7). Looking at the NGK IRIDIUM IX Spark Plug LTR7IX-11. Anybody with a SC go to cooler plugs yet ? Seems most people on other V6 forums have said there is a performance increase.
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Old 12-07-2012, 09:53 AM   #2
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I am running 1 step cooler spark plugs from NGK
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Old 12-07-2012, 10:08 AM   #3
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Quote:
Originally Posted by V6owner View Post
I am running 1 step cooler spark plugs from NGK
Did this too, as did Cant_C_Me and a few others I believe. Not sure that you will see a performance increase per se but more likely a consistent performance.
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Old 12-07-2012, 10:13 AM   #4
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Any changes to the tune needed when going to the cooler plug ?
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Old 12-07-2012, 10:14 AM   #5
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No tune changes needed bud
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Old 12-07-2012, 04:10 PM   #6
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Just curious as I am just about to join you guys in the SC frenzy. Why don't they include or do that from the install if it is truly helpful\better?
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Old 12-07-2012, 04:41 PM   #7
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Kind of like GM not putting a catch can on the V6. Its not really necessary but I wanted it. The possible damage can't be under estimated.
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Old 12-07-2012, 05:21 PM   #8
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I have the ipf kit for a while now. I started throwing several misfire codes on all cylinders. Put in the one step colder NGO plugs and gapped smaller. No more codes. I'm a lurker on here. Just an FYI my kit made 380 hp. I'm in the process of long tube headers, full pfadt and pedders suspension, coilovers and now my 3.91 rear gear.
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Old 12-07-2012, 05:46 PM   #9
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What did you gap at ?
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Old 12-07-2012, 05:55 PM   #10
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.036 but I think Jesse recommends .032. But no problems where mine is set at
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Old 12-07-2012, 06:02 PM   #11
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1 step colder .38 and colder, two steps .32 and colder on our car. dont ask me how i know
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Old 12-07-2012, 06:13 PM   #12
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How you know?
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Old 12-07-2012, 06:34 PM   #13
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Misfires and detonation on what im running if too much above that.... Just putting up my stats as a low end benchmark
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Old 12-07-2012, 07:48 PM   #14
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I have my NGK's set at .40 anything lower and I get misfires. Every car is different when pushing the limit!
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Old 12-07-2012, 10:20 PM   #15
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Mines .038 one step colder.

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