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Old 01-28-2002, 18:10   #1 (permalink)
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Question Which spark plugs?

Anyone recommend good spark plugs to use in an XR8 and what there worth?
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Old 01-28-2002, 19:15   #2 (permalink)
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Re: Which spark plugs?

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Anyone recommend good spark plugs to use in an XR8 and what there worth?
Use the NGK's or the ford plugs which are denso plugs. Cost around $20-$30...
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Old 01-28-2002, 19:43   #3 (permalink)
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I can tell you about an article that tested platinum tipped plugs, and some that lost their tip and were sitting on top of the piston, and bouncing around like a little marble.

The iridium plugs are suppose to be the best, I use NGK, but they aren`t cheap, depends on what you can afford. Like all systems that rely on several components it is not one component but a series that ensures the best result, eg leads, you can have great plugs but inferior leads will still retard spark. That is why I bought Magnecore racing leads to go with the iridium plugs.

Again this is one of the key elements to performance, the biggest meanest mother of a motor can`t perform to its potential without strong consistent spark, why skimp on a few bucks.
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Old 01-28-2002, 20:23   #4 (permalink)
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I got the NGK "R" plugs.. I think it was like $25 for all 8 of them.
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Old 01-30-2002, 18:38   #5 (permalink)
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I use NGKs and have never had a problem with them and easily get 20,000 kays out of them. Expect to pay about $28 a set.

NGK Iridium plugs are meant to be good, but very pricey. The cheapest I have heard is trade at Repco for about $14 a plug. Retail is about $20 a plug.

In the long run the cost you spend on these will be similar to normal plugs because, you apparently get greater mileage out of them. I used to hear that 100,000 ks could be had out of platinum, so I'd expect similar with these.
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Old 01-31-2002, 02:33   #6 (permalink)
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Quote:
Use the NGK's or the ford plugs which are denso plugs. Cost around $20-$30...
I have never had any luck with Nipon Denso plugs. I have had 3 that I used for kart racing. All died after approx. 10 - 15 laps. No spark. They were not cheap either at $33.00 each. I will never use another one in kart or car.
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Old 01-31-2002, 02:46   #7 (permalink)
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on the subject of spark plugs, what is the best size gap to use on an I6 OHC?
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Old 02-05-2004, 14:42   #8 (permalink)
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Re: Which spark plugs?

yes i would like to know as well. The XR6 Plugs are pre gaped to 1.1mm some people say 0.9mm others say 1.1mm
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Old 02-06-2004, 22:36   #9 (permalink)
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Re: Which spark plugs?

hehe good thread mining, its over 2 years old. Anyway, if you have good leads and ignition system, 1.1mm is the best. If you are having idle problems close them up a bit. Basically the bigger the gap the better providing the spark is consistant.
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