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Markbo
Mark Potter
Joined: 13 May 2002
Posts: 2329
Location: Tomball
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 Posted: Sun, Jan, 24, 2010, 10: 15 am Post subject: Which spark plugs? |
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Is everyone still running NGK TR6's or has something else proven better? Time for a plug change I think.
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Ken Wilson
RUNVS
Joined: 10 May 2002
Posts: 8757
Location: Houston, TX
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| Posted: Sun, Jan, 24, 2010, 1: 31 pm Post subject: |
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I run the Denso IT22s and change them every 15K-20K miles. They could easily go longer. At $8 apiece, they're a little too expensive for many. However, the longevity, smooth idle, and low misfire rate is worth it to me.
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Ken Wilson
"Anything less than a Lightning becomes prey."
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Ltngdrvr
Curtis Bender
Joined: 09 May 2002
Posts: 7564
Location: New Caney, Texas
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| Posted: Sun, Jan, 24, 2010, 1: 48 pm Post subject: |
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TR6's are probably the best for the money but they do idle a bit rougher than a iridium and you do have to change them more often but you should be able to get 15-20K out of them.
The IT22 Denso should be good for way, way more than that 15-20K miles though Ken... 
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Chris Barnes
Barnyard
Joined: 09 May 2002
Posts: 8105
Location: houston,texas
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| Posted: Sun, Jan, 24, 2010, 2: 30 pm Post subject: |
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TR-6's here!!! 
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Ken Wilson
RUNVS
Joined: 10 May 2002
Posts: 8757
Location: Houston, TX
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| Posted: Sun, Jan, 24, 2010, 3: 23 pm Post subject: |
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I know, Curtis. 
I only put about 4K miles a year on my truck, so changing them every four years is no big deal. Besides.... I just love the way the truck runs with a fresh set of plugs in it. 
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Ken Wilson
"Anything less than a Lightning becomes prey."
403 RWHP / 518 RWTQ |
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Markbo
Mark Potter
Joined: 13 May 2002
Posts: 2329
Location: Tomball
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| Posted: Mon, Jan, 25, 2010, 12: 42 pm Post subject: |
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4000 miles a year!?!?!?
Shoot, you might as well sell that thing!
Actually it is a rough idle and misfires that made me wonder. I might have to bite the bullet and try the Denso's. What gap would be ideal for a modified truck?
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Ken Wilson
RUNVS
Joined: 10 May 2002
Posts: 8757
Location: Houston, TX
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| Posted: Mon, Jan, 25, 2010, 1: 20 pm Post subject: |
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I gap mine at .036 with 14.25 lbs. of boost.
I've actually been driving the truck a bit more than usual here lately. I'm planning to do a few extra car shows in 2010, so I might end up adding 5,000 miles to the clock this year. 
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Ken Wilson
"Anything less than a Lightning becomes prey."
403 RWHP / 518 RWTQ |
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Ltngdrvr
Curtis Bender
Joined: 09 May 2002
Posts: 7564
Location: New Caney, Texas
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| Posted: Mon, Jan, 25, 2010, 6: 35 pm Post subject: |
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| Markbo wrote: | | What gap would be ideal for a modified truck? |
Mark, rule of thumb for reduction in plug gap on boosted apps is .001 per pound of extra boost over stock.
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