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Spark plug gap??

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  #1  
Old 09-12-2003, 10:06 PM
elstx elstx is offline
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Spark plug gap??

What's the gap for plugs on a 390, 2 bbl??
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Eric Smith
68 Ford F250
390
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Old 09-12-2003, 10:08 PM
mypa'struck mypa'struck is offline
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Spark plug gap??

.035 if memory serves correct.
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71 F-250 Sport Custom w/390
C6 transmission
MSD ignition
190k miles, 40k on rebuilt motor
work in progress

There's no such thing as a speed limit
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Old 09-12-2003, 10:10 PM
elstx elstx is offline
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Spark plug gap??

Positive? Schucks gave me 45's, that's what came up in their computer.
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Eric Smith
68 Ford F250
390
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  #4  
Old 09-12-2003, 10:18 PM
mypa'struck mypa'struck is offline
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Spark plug gap??

here's the url M1lion one of the administrators here posted from the manual. Looks like .035 is right.

http://mil1ion.clubfte.com/67-72EngineTune-upSpecs.html
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71 F-250 Sport Custom w/390
C6 transmission
MSD ignition
190k miles, 40k on rebuilt motor
work in progress

There's no such thing as a speed limit
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Old 09-12-2003, 10:23 PM
elstx elstx is offline
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Spark plug gap??

Thanks, appreciate everyone's help.
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68 Ford F250
390
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  #6  
Old 09-12-2003, 10:57 PM
elstx elstx is offline
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Spark plug gap??

Those specs are for a Ecoline......
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68 Ford F250
390
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  #7  
Old 09-12-2003, 11:50 PM
mypa'struck mypa'struck is offline
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Spark plug gap??

that's including an econoline. they hold true for all 390 truck motors.

Dennis
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71 F-250 Sport Custom w/390
C6 transmission
MSD ignition
190k miles, 40k on rebuilt motor
work in progress

There's no such thing as a speed limit
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  #8  
Old 09-13-2003, 12:04 AM
elstx elstx is offline
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Spark plug gap??

Thanks. Appreciate the help.
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68 Ford F250
390
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  #9  
Old 09-13-2003, 12:35 AM
mypa'struck mypa'struck is offline
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Spark plug gap??

np, I think you'll find this site is a great resource. It sure has helped me alot in working on my truck. Anything I can do to give back to this forum.

Dennis
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71 F-250 Sport Custom w/390
C6 transmission
MSD ignition
190k miles, 40k on rebuilt motor
work in progress

There's no such thing as a speed limit
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  #10  
Old 09-13-2003, 08:59 PM
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Opiewan Opiewan is offline
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Spark plug gap??

just send me a check i will get it to the right place
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Old 09-16-2003, 09:42 PM
baitmaster baitmaster is offline
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Spark plug gap??

I installed a hotter ignition system and a Pertronix kit on my 390. Plug gap is at .045 and no probs. Just had smog test and passed so well, I went home and had a beer to celebrate. (New rebuild).
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  #12  
Old 09-17-2003, 03:06 PM
mypa'struck mypa'struck is offline
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Spark plug gap??

Running a larger gap will give you a hotter spark, right? Probably didn't hurt when you passed the sniffer. Does it make your engine run hotter?

I'll have a beer to help you celebrate.

Dennis
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71 F-250 Sport Custom w/390
C6 transmission
MSD ignition
190k miles, 40k on rebuilt motor
work in progress

There's no such thing as a speed limit
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  #13  
Old 09-17-2003, 06:22 PM
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Spark plug gap??

You guys have to smog your trucks? Here in So.Cal. we're exempt up to '73.

Barry
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  #14  
Old 09-17-2003, 07:00 PM
mypa'struck mypa'struck is offline
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Spark plug gap??

hehe, I feel sorry for them, though, my dad had to pass the sniffer when he lived in Reno, NV and it passed with flying colors. Little octane boster helps, BTW.

Dennis
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71 F-250 Sport Custom w/390
C6 transmission
MSD ignition
190k miles, 40k on rebuilt motor
work in progress

There's no such thing as a speed limit

Last edited by mypa'struck; 09-17-2003 at 07:02 PM.
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  #15  
Old 09-17-2003, 09:25 PM
baitmaster baitmaster is offline
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Spark plug gap??

Here in Nv we have a yearly test, although the requirements for older trucks are quite lax. As long as they dont smoke and emit too much CO they will pass. When they give you the results, you can look at the numbers and see at what end of the limits your motor is running at. If you're in the buying mode, its worth the 20 bucks to see exactly what condition the motor is in. Numbers dont lie. (Very much)
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