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What spark plugs to user with 408ci 500rwhp 11.6 CR ?

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Old 05-21-2009, 03:15 AM
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Default What spark plugs to user with 408ci 500rwhp 11.6 CR ?
What spark plugs to user with 408ci 500rwhp 11.6 CR ?
will the TR55IX be fine or it will be too hot ?
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Old 05-21-2009, 09:26 AM
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go colder, either a tr6 or tr7.
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Old 05-21-2009, 01:30 PM
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Run a Tr6. You will be fine with the 6 unless you try and spray.
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Old 05-21-2009, 06:34 PM
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yeah, something like a tr6,tr6 ix,autolite or any plug in that heat range should be fine. i run a tr7 ie but i spray mine alittle once in a blue moon.
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Old 05-22-2009, 01:47 PM
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Tr55 are good up to 11.5 comp. I'd use tr6 after that, if we are talking all motor here.
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