Appreciate some input on spark plug reading
I was with a friend yesterday that basically raced from the 60's through the 90's. Raced many cars in many classes. Even has a Wally! I had him look at my plugs and went through the discussion with him. His opinion was it looks just about right, perhaps a tad rich, if anything, but not too bad.
I could just be facing what Don (@B3422w5 ) suggested - that being just not enough port flow and/or cam for the 4" stroke.
Florida won't be getting any cooler as the months progress so it will be interesting to see what response, if any, I can get if I make a change. Oh, and the car did just make a 45-50 mile round trip to a local cruise Friday afternoon/evening. Not bad given the 90 deg temps!! Here it was parked with our friend's Petty blue 72 Demon 340. Cool!!
Curious why you suggest a hotter plug? If I'm reading the ground strap correctly, I'm fairly tight on timing using pretty much the standard heat range plug as these AR3924 Autolite's compare to the old Champion RJ12YC's (or RC12YC's - you get the point!). The burned clean area goes around the corner of the strap and gets somewhat close to the threads. Maybe a degree or 2 could be added but surely no more. Why do you suggest a hotter plug? I was thinking if I'm going to try a bit of spark, perhaps try it with a 1-step colder plug.
I was with a friend yesterday that basically raced from the 60's through the 90's. Raced many cars in many classes. Even has a Wally! I had him look at my plugs and went through the discussion with him. His opinion was it looks just about right, perhaps a tad rich, if anything, but not too bad.
I could just be facing what Don (@B3422w5 ) suggested - that being just not enough port flow and/or cam for the 4" stroke.
Florida won't be getting any cooler as the months progress so it will be interesting to see what response, if any, I can get if I make a change. Oh, and the car did just make a 45-50 mile round trip to a local cruise Friday afternoon/evening. Not bad given the 90 deg temps!! Here it was parked with our friend's Petty blue 72 Demon 340. Cool!!