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Thread: What Spark plug?
          
   
   

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  1. 07-10-2007 02:52 AM #1
    Nomad Mike
    Nomad Mike is offline CHR Member
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    What Spark plug?

     



    What is a good street plug for my 350 small block? I like AC and Autolite. Need heat range.

    Trick Flow aluminum heads (64 cc chambers) 23 deg. 195 runners
    Comp Thumpr Cam:
    Lift .513 intake and 498 exhaust
    Duration @ .050 is 227 and 241
    Holley 650 dp
    MSI ignition

    Thanks for any help
    Nomad Mike
    Last edited by Nomad Mike; 07-10-2007 at 05:45 PM.
    OlChvyRacr
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  3. 07-10-2007 07:49 AM #2
    Racecar100
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    You didn't finnsh all the information.
    What piston you have? Dome or flat top and dish?
    What fuel are you plan on burning?
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  4. 07-10-2007 04:45 PM #3
    Nomad Mike
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    Oh, sorry bout that.
    Flat top pistons, 91 octane here at sea level in so. Calif.

    Is it advisable to run a hotter plug with aluminum heads?

    Nomad Mike
    Last edited by Nomad Mike; 07-10-2007 at 05:44 PM.
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  5. 07-11-2007 07:37 AM #4
    Racecar100
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    The last number on the Autolite plug part number it the heat range, so you need to run three or four un the heat range.. I would start out three first and if the motor skip little while driving the step up one number until it runs smooth. If you are running a 350 to got 10:1 compression.
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  6. 07-12-2007 03:49 AM #5
    Nomad Mike
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    Great, thanks Racecar.

    Now maybe you can tell me what a good total timing starting point would be.

    Nomad Mike
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  7. 07-12-2007 07:44 AM #6
    Racecar100
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    Start at 36 dreg total timming, now if it rattle little back the timming down little until it stop.
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  8. 07-13-2007 02:11 AM #7
    Nomad Mike
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    Danke Schoen
    Last edited by Nomad Mike; 07-13-2007 at 02:14 AM.
    OlChvyRacr
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