[6pack] Spark Plug Heat Range

[Richard Taylor]

I’ve used Champion N7YC in the past. Got them at an ear by auto parts store. Don’t remember which. They work well with a HEI. 
Dick  

> On Jun 6, 2023, at 2:41 PM, Rochlin Robert <rrochlin at comcast.net> wrote:
> 
>     I’m looking for a spark plug that is just a little cooler than the stock Champion N9YC plugs that I’m running. I’ve had no luck finding Champion N8YC plugs and each manufacturer has a different designation for the heat range for their plugs so it’s hard to do a direct comparison .  Does anyone have a source for cooler plugs? I’m not concerned if they are not Champions.
>    Best,
>    Bob
>    “72 TR6
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