'76 smogger 318, 2 bbl. motor, with plenty of miles , I don't think ever apart. Doesn't really smoke, I guess 150,000 mi. Just a driver and fun car. Recommendations for plugs and gap??
Champions J14's? are the stock plug I believe. What's the factory gap for a 76 318? Just use what is recommended.
There ya go. I shouldn't have answered in the middle of a restaurant.J's are short reach. The 318 takes the 3/4 reach plug.
So....Id use the RC14YC champion and gap it at .045 as long as the plug wires, cap and rotor are in good shape.
or RN14YCs; non coppers but they don't last as long.
I have coppers in my 367HO. They've been in there since 1999,lol. They have quite a bit more than 100,000 MILES on them. The haven't been out since 2004 or 2005.
IMO stock mopars like Champions.
I think there's two issues with listening to advice on the internet...Everything likes Champions. When I get paid to do a tune up, I pick the plug.
There are two issues with Champions. Number one is guys running a different brand of plug and using a cross reference to pick a Champion. That's a bad idea. Cross reference charts are essentially a guessing game at best. Look in the catalog and pick the plug for your application. If you are looking for a racing plug, get on the phone with someone who knows the plug line.
The second issue is Champion has always used a softer center wire than other plug manufacturers. That means they don't last as long. 5k on a set of plugs and I dump them. Racing plugs get 20-30 passes and hit the can.
The reason for the softer center wire is still argued amongst electrical needs to this day and it has to do with how the flame actually starts. The softer core wire allows the flame to build easier. But it wears out quicker.
If you are a cheap screw and think plugs should last 50k then buy other than a Champion.