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Spark Plug Question. I searhced. It's about RX-7 plugs.

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Old 12-09-2008, 06:10 PM
  #51  
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they work however u need a spacer for one of them (L) or (T) but not sure which....I personally think you are better off just running stock rx8 plugs
Old 12-09-2008, 07:38 PM
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Originally Posted by Jon316G
Pics or it never happened
This is interesting to hear though.
you try taking a pic of a dark hole and see how far you get
Old 12-09-2008, 10:57 PM
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hehehe
Old 12-09-2008, 11:03 PM
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Originally Posted by 04RX8man
they work however u need a spacer for one of them (L) or (T) but not sure which....I personally think you are better off just running stock rx8 plugs
The trailing plugs required spacers.
I ran the RX7 plugs for a couple years, but would agree that its better to stick with the stock plugs.
Old 12-10-2008, 12:43 PM
  #55  
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I'm currently running stock RX-8 plugs in the trailing, and RX-7 plugs in the leading. I didn't want to fool with a spacer, and possibly screwing something up.

My fuel mileage is the exact same with the -7 leading plugs. I've got no noticeable loss of power. I've been running these for about 4,000 miles, so far, with no noticeable issues/problems.

I'm planning on pulling the plugs at 10k miles to check them out, to satisfy my own curiosity. I'm not expecting to see anything significant/different. And for the cost difference, it's well worth it to me to run the 7 plugs if there's no difference in mileage & carbon build up.
Old 12-12-2008, 10:56 AM
  #56  
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So does anyone have a website or source where I can find the 2mm shims? I have been looking for them here in town, and cant find them. I am starting to get misfires whenever i am off the throttle. So if anyone can help me find them I would greatly appreciate it. I went ahead and bought 9's for the "L" and "T" for my turbo application.
Old 12-12-2008, 10:58 AM
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I have them on my list of things to acquire so I may be able to help soon.

Last edited by Charles R. Hill; 12-12-2008 at 05:03 PM.
Old 12-12-2008, 11:03 AM
  #58  
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Originally Posted by J.Cab
So does anyone have a website or source where I can find the 2mm shims? I have been looking for them here in town, and cant find them. I am starting to get misfires whenever i am off the throttle. So if anyone can help me find them I would greatly appreciate it. I went ahead and bought 9's for the "L" and "T" for my turbo application.
try lookin for 2 1mm shims...they basically look like washers that fit on the spark plug
Old 12-12-2008, 04:57 PM
  #59  
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Originally Posted by Charles R. Hill
I have them on ly list of things to acquire so I may be able to help soon.
hopefully soon.....I would like to put in the new plugs for the MM dyno day in January!
Old 12-12-2008, 09:42 PM
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what kind of gaps are people running with the stock plugs?
OD
Old 04-21-2009, 03:56 PM
  #61  
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Does anyone know where you can get the 2mm (or 1mm) shims for the trailing plug? or would plain washers do the trick?

Would these work? http://www.mcmaster.com/#98089a392/=1jnhf8
Old 04-21-2009, 03:59 PM
  #62  
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try lookin at home depot or autozone
Old 04-21-2009, 04:00 PM
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Originally Posted by dozer
try lookin at home depot or autozone
So just the plain washers work fine, I take it? Just want to be sure they arnt special crush washers or anything


Thanks!

Last edited by ndhoffma; 04-21-2009 at 04:03 PM.
Old 04-21-2009, 04:02 PM
  #64  
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well yeah thats what they are, just as long as they fit
Old 11-19-2009, 12:06 AM
  #65  
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7 month bumpage...

To Brettus, if you see this, I'd really love to know more about your naked housing and rx7 plug. I ran all trailing rx7 plugs for a while, using two shims for the trailing position. After reading your post, I'm just wondering if the 21mm vs 19mm issue is fact or fiction. No need to waste your time on this thread though, just wondering.

And, NGK part numbers get colder as the number get higher correct? So what is the real reason that rotary leading and trailing heat ranges are off by about two level?
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