According to my Chilton's manual, for a 74 250 they should be set at 0.032 - 0.036 for every state except CA, and 0.042 - 0.046 for California cars. -Corbin
well the old pluggs that were in there were gapped at .045 and im in nj and i think the car was made in canada:confused: so what should i set the gaps at? should i go with the manual or should i go with what was in there?
Well, I would go with the .032-.036 gap. Either way it won't make too much of a difference. Maybe someone else can give you a more definite answer, but the .032-.036 gap will work fine in your car. The California one was different because of the smog regulations, and somehow different the spark plug gap helped out in the long run to lower the emmisions. -Corbin
thats for the info guys. ill join the club when i get my license (dec 12) and get that baby painted. im going to get it painted hopefully for christmas. either that or wheels and tires but i decided on the paint.
yeah yeah yeah... yada yada yada.. todd is 16 and is the co- state rep for new jersey. he gets his license in january... you two should hook up!
It makes no difference if it is a Canadian made Ford or US, except if it is a Cali car. I'll withhold my Cali comments. Sorry, Corbin.
It's okay, I can take them. Yeah, California is kind of sucking right now. Actually make that majorly sucking in most all aspects of the state economy, government, and automobile regulations. I am just glad my car is a 73 and I don't have to smog it and it didn't have the pound of smog stuff on it as the later year Mavs did - missed it by a couple years! fewwwww!! -Corbin
Gap your plugs at .35 Ca car or not. at .45 you will probabily eat plugs and it might even ping more.
Not true. Duraspark jumps a pretty large gap with ease. There should be a sticker on your valve cover or cowl with engine info, including gap and idle speed.
I run mine at .054. If you're worried about eating plugs use double platinum tips, they don't erode like standard plugs. That's part of the reason new cars can run large gaps and still have the plugs last 100,000 miles.
The points type distributor usually call for a gap of .035. The Dura Spark can go out to .045 and over .050. The larger gaps will help the idle smoothness. Erosion is often a function of spark energy and erodes the centers. On the late model cars with four coils per eight cylinders, four of the cylinders are actually feed spark with reverse polarity. If you could check these plugs at very high milage you might see four plugs eroded more than the other four. Do to the engine manegment being so good at keeping the fuel centered on 14.7 air/fuel ratio, this is no longer a problem for plugs.
