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Which Spark Plugs to use with boost

Old 01-29-2007, 10:14 AM
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Default Which Spark Plugs to use with boost

I was just wondering if you could tell me, what spark plug to use with a 8.5 comp 346 ci ls1 with race gas and 26 psi of boost? And also how much total timming I can run with this?
Old 01-29-2007, 10:16 AM
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Originally Posted by pt76jon
I was just wondering if you could tell me, what spark plug to use with a 8.5 comp 346 ci ls1 with race gas and 26 psi of boost? And also how much total timming I can run with this?
R5671A-9 or -10.
Old 01-29-2007, 02:21 PM
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what brand/kind of plug is that part number? lol.
Old 01-29-2007, 02:42 PM
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Ngk Tr6
Old 01-29-2007, 02:48 PM
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Where do you want to set the gap?

ME: Turbo car running 15lbs+
Old 01-29-2007, 04:01 PM
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NOT a tr6 for that kind of power. The plug V6 bird said is correct. Depending on how much power is being made at 26psi (thinking dinky turbo here) you may even go hotter to a -8 instead of -9 or -10
Old 01-29-2007, 04:08 PM
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Originally Posted by cablebandit
NOT a tr6 for that kind of power. The plug V6 bird said is correct. Depending on how much power is being made at 26psi (thinking dinky turbo here) you may even go hotter to a -8 instead of -9 or -10
Whoa I had to re-check the original post. 26 pounds of boost oh man that's alot of boost.
Old 01-29-2007, 05:47 PM
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Its an NGK plug number.
Old 01-29-2007, 05:47 PM
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Originally Posted by Pewtavert
Ngk Tr6
i hope you are kidding!
Old 01-29-2007, 05:48 PM
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Originally Posted by 1INSANEGTO
Where do you want to set the gap?

ME: Turbo car running 15lbs+
between .022-.026
Old 01-30-2007, 06:55 PM
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Originally Posted by pt76jon
I was just wondering if you could tell me, what spark plug to use with a 8.5 comp 346 ci ls1 with race gas and 26 psi of boost? And also how much total timming I can run with this?
AUTOLITE #103
Old 01-30-2007, 08:41 PM
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Autolite AR94s.


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