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TR55 or TR6

This is a discussion on TR55 or TR6 within the External Engine forums, part of the LSx Technical Help Section category; For an 11:1 compression stroker? I know I have asked this before...but change time is coming. Opinions??...

  1. #1
    Slow'er'Ass Mr. Luos's Avatar
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    2008 Trailblazer SS

    TR55 or TR6

    For an 11:1 compression stroker?

    I know I have asked this before...but change time is coming.
    Opinions??

  2. #2
    Senior Member mrr23's Avatar
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    TR6 or autolite 103. i'll be using autolite 104 in mine. another step colder. NGK BP7EFS is the equivalent.

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    Slow'er'Ass Mr. Luos's Avatar
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    Kinda what I thought. With the compression being a touch higher...it won't need as hot a spark.

    Is that thinking correct??
    If not...why exactly should I run the cooler plug?

  4. #4
    Slow'er'Ass Mr. Luos's Avatar
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    Putting the TR6's in as we speak....kinda. Waiting for it to cool down.

    .045 gap sound good?? Or should I open them up a little more??

  5. #5
    Senior Member mrr23's Avatar
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    a cooler plug will aide in preventing detonation from the tip being too hot. NA, keep it at least .045"

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