Gap

[Ba Mustang]

I just installed the Flamethrower II coil on my 200. I also have the ignitor ignition. What should I set the gap on the spark plugs at? I usually just put the plugs in without checking the gap.

 

[CZLN6]

Howdy Back BA:

I'd suggest .050" and assess from there. If you get a rough idle or a high speed miss, check the plugs. It may require a colder plug, or a .045" gap. What's the rest of the engine? Cam? Trans? what plug? What distributor/carb combo?

Adios, David

 

[Ba Mustang]

It is a 200 bored .040 with 3 speed trans and the Holley/Weber 2v carb from stovebolt. I have motorcraft plugs and stock distributor with the ignitor setup.

 

[Ba Mustang]

Also just found out that my grandfather ordered the V8 flamethrower instead of the 4/6cyl coil. So I don't know if that will change anything.

 

[Lazy JW]

I doubt that the V8 coil will be a problem. It is always a good idea to check the gaps though, they aren't always correct.
Joe

 

[CZLN6]

Howdy Back BA:

YOur stock OEM distributor is a Load-O-Matic with a vacuum advance only activated by a modified vacuum signal from an Autolite 1100 with a Spark Control Valve to correctly advance the spark. Your H/W does not have a SCV. It has a ported vacuum source. It will not send the correct advance signal to your LoM distributor.

The best/simplist solution will be to find and install a '68 and later distributor. Opening tHe gap of the spark plugs will not fix this mis-match.

Sorry to be the bearer of bad tidings.

Adios, David

 

[Ba Mustang]

Gapped them to .50 and the mustang drives great.

 

[Ba Mustang]

What would adjustable rocker arms do for my car?

 

[Harte3]

Nothing in particular over and above having to adjust them as part of a tune-up routine.