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Thread: what spark plugs?

  1. #1
    Senior Member MASTER BUILDER
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    what spark plugs?

    Anyone tell me what is a good spark plug to use on a street driven sbc edelbrock perf. rpm heads 10 to 10.5 comp. Ive been using accel 576s, I'm just wondering if there is a better choice? Let me know if you need more info.

  2. #2
    Senior Member DYNO OPERATOR
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    I've used Accels, Champions, NGKs, and AC Delcos and have good luck with all of them. I'm running Champion racing plugs now. As long as it's the right heat range and it ignites the fuel in the cylinder, it's a good plug. JMO.

    TS1955

  3. #3
    Senior Member MASTER BUILDER
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    Might be a stupid question but what heat range should I be running? I'm running 93 octane? 26 degrees of timing.

  4. #4
    Senior Member RACING JUNKIE
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    if using AC Delco I always ran R45 or R46....NGK I use 8'sor 7's.

    I'd use whatever one allowed it to idle the cleanest since it's a street car.
    jmo

  5. #5
    Senior Member DYNO OPERATOR
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    Quote Originally Posted by Tod74
    if using AC Delco I always ran R45 or R46....NGK I use 8'sor 7's.

    I'd use whatever one allowed it to idle the cleanest since it's a street car.
    jmo
    X2...Good call Tod

    TS1955

  6. #6
    Junior Member JOURNEYMAN
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    I am using R45TS in a stock-type 350 with mild cam. Seem to run good and they are pretty cheap. Mep

  7. #7
    Senior Member EXPERT BUILDER
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    call head manufacturer and ask,id think if using 26 degrees you must have 15:1 compression,if running pump gas probably all in set at 36 and be safe


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