I have tried the search section, but no luck. Can someone tell me what is a good spark plug to use with a 454 H.O. engine? Thanks again.

 

I would go with either AC Delco or Autolite. I use AC CR grade comercial grade. For you I would recomend AC CR43TS. Make sure they give you the ones that have C in the front of the #. R43TS is the same plug but in a non-comercial grade. The center and ground electrodes on the comercial grade plugs are significantly thicker. I also side gap my plugs. This gives them the same effect as the high dollar plugs like Splitfire and Bosch +4. all of the major plug manufacturers have thier own little niche that they claim makes thier plugs better than the other. None of them will mass produce a side gapped plug because as soon as the public saw it they would realize how easy it is to convert a standard plug. Then they would loose the $ they make on the fancy designs. IMO, a side gapped standard plug has the same effect as the fancy high dollar ones. Side gapping entails trimming back the ground electrode so the center electrode is more exposed to the compressed mixture in the cylinder. You trim back the electrode so that when looking straight down on the plug you can see almost all of the center electrode exposed. The ground electrode should just barely overlap the center electrode. The only possible drawback if any from side gapping is that it may be a good idea to replace the plugs more often. This is because side gapping will have the spark trailing off the edge of the center electode more regularly and can wear that portion down quicker.

 

here's some
http://forums.corvetteforum.com/zerothread?id=168404
http://forums.corvetteforum.com/zerothread?id=298056
http://forums.corvetteforum.com/zerothread?id=532138

Just have someone type "spark plugs" and you can read a lot more. :lol: