spark plug gap

spark plug gap


Crazy Sr. Respected Jeeper
79 cj5 258, t150, dana 20 transfer case, dana 30 front, 20 rear,warn hubs,2.5" procomp lift,teamrush,msd box,mc2100 carb,hedman header,clifford intake,optima battery, ford shock towers.
ok so i have all the connectors and rubber mounts to put my msd box in. it says to open the gap but not to what size. right now im running with a gm 4 pin module and have them set a .045". do you guys think ill need to open them up more or leave them there. thanks
From MSD Tech:
These examples are just starting points to get you going in the right direction.
Every application is different and should be tested and tuned:
Compression Spark Plug Gap
Up to 10.5:1:_______ 0.050" - 0.060"
10.5:1 - 13.0:1:_____ 0.040" - 0.050"
Above 13.0:1:_______ 0.035" - 0.045"
Last edited:
looks like the 50 to 60 range. i think ill bump them up to .050" and see what that does. thanks

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