Colder Copper Spark Plug #'s For 4.6L Running Nitrous - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 04-15-2006, 12:33 PM   #11
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I honestly didnt know that and a BIG help, Ya think the Parts stores would know that..And Mr Goodwretch didnt know it either. I was told by my Dealership they didnt have copper plugs for the N*. So can ya give me the AC Delco Racing # you use, I dont want to make a debate about it but I've found keeping with the OEM manufacturer regardless of which seems to work best. The boost is probably about the same for v8nitrous-v6 */C. Zex said just one range colder up to 150 Hp shot. and a shorter(?) nose if possible.
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Old 04-15-2006, 01:19 PM   #12
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TR-55'* are one range colder, and TR-6 NGK'* are 2 ranges colder
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Old 04-15-2006, 02:25 PM   #13
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I run TR55 in winter, TR6 in summer. TR6'* are just a bit too cold for winter use for me, and foul after a couple months.
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Old 04-15-2006, 03:18 PM   #14
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Thanks guys, as I mention the plugs on rear side are a bitch and drive most of the time un-nitroused(only cause I cant afford to hammer down all the ) so TR55 it is.

Looking into a progressive wet plate though, and 90Lb bottle(alot cheaper to fill) (and I could fill my own 10Lb bottle for track) but thats way in the future, have a lots of unfinished mods on my table

So much I want and so little trunk space. Wheelchair'* gonna end up strapped to roof
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Old 04-15-2006, 03:22 PM   #15
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John? What'* your stock gap? If it'* .060", Gap the TR55'* to .055".
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Old 04-15-2006, 04:01 PM   #16
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Yes it'* .060 and zex said go smaller on the gap, wasnt sure how much though. Does the TR55 have a shorter profile?
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Old 04-16-2006, 12:44 AM   #17
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When I went to gap my TR55'* they were pregapped at .55 already.
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Old 04-16-2006, 12:58 AM   #18
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Quote:
Originally Posted by fantastic88
When I went to gap my TR55'* they were pregapped at .55 already.
Same happend to me. I didn't bring it up earlier because I thought it was a fluke
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Old 04-16-2006, 01:10 AM   #19
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If he is injecting nitrous he is going to have to close the gap more then that. If he doesn't he is going to be blowing out plugs left and right.
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Old 04-16-2006, 12:10 PM   #20
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Or keep the gap and go with a hotter ignition. Nitrous isn't my realm. How much smaller should he go?
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