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what sparkplug for a high compression motor?

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Old Jul 5, 2002 | 09:07 AM
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Default what sparkplug for a high compression motor?

Engine I'm building will be upwards to 12:1 compression. Should I go with the cooler TR6 plug?
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Old Jul 5, 2002 | 02:34 PM
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Default Re: what sparkplug for a high compression motor?

<img border="0" alt="[boring]" title="" src="graemlins/gr_zzz.gif" />
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Old Jul 5, 2002 | 02:54 PM
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Default Re: what sparkplug for a high compression motor?

i would.
ngk has another plug i like to run, not in the "tr" line up. ill find the part number for you. if i still have it.

steve frank
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Old Jul 5, 2002 | 03:20 PM
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Default Re: what sparkplug for a high compression motor?

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Fireball:
<strong>Engine I'm building will be upwards to 12:1 compression. Should I go with the cooler TR6 plug?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">They say cooler is better on a high compression motor so tr6's is what I would run.
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Old Jul 5, 2002 | 08:07 PM
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Default Re: what sparkplug for a high compression motor?

Brian, I would defintely use at least an NGK TR6. I have run these for quite awile on all my setups with great luck. Anytime you are running on the edge of detonation, these are a great plug to use.

Jason
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Old Jul 8, 2002 | 10:19 AM
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Default Re: what sparkplug for a high compression motor?

thx

if you find anything steve...let me know <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
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Old Jul 8, 2002 | 10:32 AM
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Default Re: what sparkplug for a high compression motor?

So how's it coming along?
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Old Jul 8, 2002 | 02:52 PM
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Default Re: what sparkplug for a high compression motor?

Once you go over about 11:1, a switch to TR6 seems to make sense.
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Old Jul 8, 2002 | 06:01 PM
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Default Re: what sparkplug for a high compression motor?

I run bosch platinum+4's in mine, have not had any problems yet.
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Old Jul 8, 2002 | 06:56 PM
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Default Re: what sparkplug for a high compression motor?

I like the autolite AR472, its a non resistor plug. Has the ground cut back already and is much thicker and stronger. <img src="http://images.cardomain.com/installs/217000-217999/217306_20_full.jpg" alt=" - " />
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Old Jul 9, 2002 | 08:09 AM
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Default Re: what sparkplug for a high compression motor?

I have been running TR55s in my Stroker for over a year with no problems. 12.4:1 Compression.
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Old May 17, 2005 | 07:57 PM
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Default

So should I run a TR55 or a Tr6 in my built motor that will have around 11:1 compression? I will be spraying it, but not for a few months, and I plan to just change the plugs then.
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Old May 17, 2005 | 09:19 PM
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TR55 stock heat range? Correct? My setup is around 10.7-1 static and I am running AC Delco Copper's that cross reference to TR55's. Is there anything to be gained by switching to the TR6 at this level?
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Old May 18, 2005 | 01:26 AM
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Default

Originally Posted by Jimmy P
So should I run a TR55 or a Tr6 in my built motor that will have around 11:1 compression? I will be spraying it, but not for a few months, and I plan to just change the plugs then.
For that combo, I'd go with a set of TR6's at standard gap and call it a day.
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