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Can I run NGK TR6's in stock n/a motor?

This is a discussion on Can I run NGK TR6's in stock n/a motor? within the External Engine forums, part of the LSx Technical Help Section category; I have an extra set of NGK TR6's in the garage and I am doing a plug and wire swap ...

  1. #1
    danman
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    Can I run NGK TR6's in stock n/a motor?

    I have an extra set of NGK TR6's in the garage and I am doing a plug and wire swap on a buddy's car tomorrow. It has lid and Borla. Can I still run the TR6's with it n/a? I know most people run the TR55's.

    Would it hurt performance?

  2. #2
    Slow'er'Ass Mr. Luos's Avatar
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    Yes you can.

    Quote Originally Posted by danman
    Would it hurt performance?
    Minimal. But I would say it is too cold of a plug for a stock LS1.

  3. #3
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    Yeah, it'll hurt performance. I'd just spend $15 and buy the right plugs. It wouldn't kill you to run the TR6's, but wouldn't be a great idea either.

  4. #4
    your parts guy!!! 1fastcamarosss11's Avatar
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    Quote Originally Posted by danman
    I have an extra set of NGK TR6's in the garage and I am doing a plug and wire swap on a buddy's car tomorrow. It has lid and Borla. Can I still run the TR6's with it n/a? I know most people run the TR55's.

    Would it hurt performance?
    you plan on running nos? if so use them. if not may want to rethink it.

  5. #5
    SOM BTCH
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    I've heard if you have a fairly aggressive NA cam, you might want to go to the colder plug. Any thoughts on this as I've been considering doing that myself for my TR230 cam.

  6. #6
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    Quote Originally Posted by gillbot
    I've heard if you have a fairly aggressive NA cam, you might want to go to the colder plug. Any thoughts on this as I've been considering doing that myself for my TR230 cam.
    I am running TR55's in my LARGE cammed 402 (11:1 compression).
    Might try the TR6's here soon enough.

    Currently no problems with the TR55's.

  7. #7
    SOM BTCH
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    I ahven't heard of problems with people running 55's but I have heard of smoother operation and better performance after going to 6's. I was just curious.

  8. #8
    Slow'er'Ass Mr. Luos's Avatar
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    General rule of thumb...
    Boosted and bottled cars get TR6's.
    NA cars get TR55's. This can change for heavily modded motors.
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  9. #9
    danman
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    I can't find any TR6 plugs in town. What other brand do you all recommend?

  10. #10
    Slow'er'Ass Mr. Luos's Avatar
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    Do you have to change them right now??
    If not...byunspeed, thunder, TSP
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    Why the TR6?

  11. #11
    danman
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    I had a 2000 WS6 with nitrous and I had those left over. The only reason I asked is that I only used the nitrous 5% of the time. The other 95% was N/A and the TR6's ran just fine in that car.

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    Quote Originally Posted by danman
    I can't find any TR6 plugs in town. What other brand do you all recommend?

    What about the TR55's? You want a hotter plug in your car unless you are running N2O or have real high compression. You want a more complete burn in the combustion chamber. Some might say TR6's FEEL smooth in their cars, but they will still not perform like the hotter TR55's will.

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    Quote Originally Posted by gillbot
    I've heard if you have a fairly aggressive NA cam, you might want to go to the colder plug. Any thoughts on this as I've been considering doing that myself for my TR230 cam.

    A fairly aggressive cam won't require a different plug. It's when you mill your heads and run real high compression that you MIGHT need a colder plug.

  14. #14
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    What do you consider real high compression??

  15. #15
    SOM BTCH
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    Quote Originally Posted by SLOW346
    A fairly aggressive cam won't require a different plug. It's when you mill your heads and run real high compression that you MIGHT need a colder plug.
    Changing a camshaft will increase dynamic compression though.

  16. #16
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    Good questions. I know there is a lot of buzz on ls1tech about them with H/C cars. I'm running TR5's right now ( same as TR55 but come gapped at .039 ) but thought about going to a TR6 gapped at .038. I'm 11:1 right now.
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