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Thread: 400 SBC problem - ignition or carburetion?
          
   
   

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  1. 08-18-2023 08:38 AM #3
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    Dorsey
    Dorsey is offline CHR Member
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    Car Year, Make, Model: 29 Ford Hi Boy Roadster
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    Thanks, I'll take both of those suggestions. Our local Advance Auto Parts has NGK for this engine in stock, so I'll pick those up today and post the results.

    NGK are not the least expensive of my options, but price is less important than performance and longevity. I also noticed that NGK recommends gapping at .045 rather than .030. I'm pretty sure that I had found the smaller gap in a tune-up chart for that engine (400 SBC). Pardon my ignorance, but is the gap manufacturer-specific? I thought it more a function of other factors such as timing, dwell and coil strength.
    Last edited by Dorsey; 08-18-2023 at 09:27 AM.
    Dorsey

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