Re: V8 spark plug fitment?
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Home away from home
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Worse thing about using a longer thread is, the threaded portion sticking out in the combustion chamber can build up "soot" and make them hard to remove later down the road.
John
Posted on: 2016/8/13 14:58
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Re: V8 spark plug fitment?
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Home away from home
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AC 45 XLS. Might be ble to use 44XLS. DO NOT use anything 43 or lower in AC plugs unless u live in the Mojave desert or high speed racing.
The 45XLS is a 3/4" thread, for 56 V8's. 55 used a 7/16" thread. (someone double chek me on that). I'm running 45XLS in my 56 Executive for ovver 15K miles and 7 yearss now. If u come back and say u have to have Champions or NGK or somekind of a high tek platinum cooated plug then all i can say is "ok guy".
Posted on: 2016/8/13 16:55
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VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245 |
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Re: V8 spark plug fitment?
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Home away from home
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Also, DOUBLE CHECCK to make sure the engine has 56 heads.
If it has 55 heads then that mite b why there were 7/16 thread plugs in it when u got it. Stick some thing in the spark plug hole and measure how longgg the head is tapped.
Posted on: 2016/8/13 17:02
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VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245 |
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Re: V8 spark plug fitment?
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Forum Ambassador
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Has anyone tried the E-3 plugs that are advertised all over the REVN TV channel. I see they even have some in 10mm size but don't know if the long reach would fit in a L8 Packard. With the multiple electrodes and claim of increased efficiency under adverse conditions, if they would fit I wonder if they would make any difference with a marginal 6v ignition.
Posted on: 2016/8/13 17:18
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Howard
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Re: V8 spark plug fitment?
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Home away from home
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Cap the "multiple electrode" be GAPPED???
Such plugs have been used iin Aviation engines for many decades. But i don't think they can be gapped. I'm Not real familiar with the Av. plugs otherwise.
Posted on: 2016/8/13 17:24
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VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245 |
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Re: V8 spark plug fitment?
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Home away from home
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And then u would have to figure out what HEAT RANGE of plug to use on the "multiple electrode" plugs. If theyy are actualy Aviation plugs then most likely a very HOT plug, mayb no heat ranges available for automotive use. I don't know. Just guessing.
Posted on: 2016/8/13 17:26
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VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245 |
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Re: V8 spark plug fitment?
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Forum Ambassador
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Autolite 66.
Champion RN14YC. Of the two I far prefer the Autolite.
Posted on: 2016/8/13 17:26
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Re: V8 spark plug fitment?
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Forum Ambassador
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Good question and I don't know if they can be gapped to the .025 or so number needed on 6v. I just happened to see one of the shows promoting the heck out of them for an engine on a clunker that was prone to fouling. Thought of Packards and the sometimes weak sparks with 6v.
Posted on: 2016/8/13 17:29
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Howard
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Re: V8 spark plug fitment?
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Home away from home
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IIRC my 56 Executive had Autolite 66 in it when i got it. They ran just fine too for about 12K miles or so.
I would simply avoid Champion unless u can get OLD STOCK Champion plugs from the 50's 60's or maaybe early 1970's.
Posted on: 2016/8/13 17:31
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VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245 |
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