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spark plugs

Post  motorhead on May 18th 2013, 6:21 am

which spark plugs would you use in a 460 for city driving?

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Re: spark plugs

Post  Fordpower on May 26th 2013, 12:57 am

Depends on build.
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Re: spark plugs

Post  69F100 on May 26th 2013, 1:16 am

Fordpower wrote:Depends on build.

and what heads are you running the c8, c9, dove heads carry the 13/16 plug which would be a different than the ones that has the 5/8 plugs
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Re: spark plugs

Post  dfree383 on May 26th 2013, 3:12 am

how much compression? What heads? Whats the rest of the build?
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spark plugs

Post  motorhead on May 26th 2013, 7:20 am

The block is from a 429 commercial truck. I got the 460 crank, rods, and C8VE heads with ss valves, porting, and spring up-grade from Paul Kane. The pistons are Probe forged, adjustable roller rockers, Crower level 5 hydraulic cam and lifters, double roller timing chain, Pertronix distributor, 850 carb, aluminum intake, headers, and a High Flow Dynamics street strip oil pump. At or slightly above 10 to 1 compression.

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Re: spark plugs

Post  dfree383 on May 26th 2013, 8:23 am

A Factory Heat Range Plug should be just fine for that application.
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autolite 124

Post  manofmerc on May 30th 2013, 7:02 am

390-428s use the same 18mm plug .On the fe forum a lot of guys use the autolite 124 .This is similar to the old autolite bf32 .Which is one heat range cooler than an autolite bf42.The 124 is standard in the old 361-391 big truck engines .I just completed a build on my 428cj engine with 10.1 compression .I am running a set of 124s in my engine and so far they look line .i believe the std. heat range plug for your engine is an autolite 45.If you have over 9.5 compression you might consider trying the 124s .Most of the 390gt-428cj came with the cooler bf 32 from the factory .Doug

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Re: spark plugs

Post  69F100 on May 30th 2013, 11:48 am

I ran the 124s in my 460 I went from 45 to the 124s I could see a different in the plugs when checking them the 124s looked a lot better was 11.5 cr
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