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Discussion Starter #1
Just read article in Hot Rod magazine that stated older leaded gas motors that are running unleaded gas should be running one -two heat range hotter plugs to compensate for the missing lead. I am using pure unleaded which is still available in my area without the ethanol in it. What plugs are you guys with the 194 engines using?
 

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I'D LIKE TO KNOW TOO, I'M ABOUT TO PUT A 250 OUT THERE!

 

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I ran R44xls and R45xls AC Delco for many years in my 194/230/250 Frankenstein engine that came with my Nova. It was also in front of a powerglide and I ran 89 unleaded fuel. I had to of drivin that thing for 200k miles!
 

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Discussion Starter #7
Im running the autolite 66's right now which is a cross from the stock ac/delco's i believe, the plugs look a little dark/rich and after reading the article in Hot Rod i think i will go one heat range hotter.
 
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