Mag and spark plug ?
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Mag and spark plug ?

  1. #1
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    Default Mag and spark plug ?

    I ordered Autolite 2593 plugs for my engine and what I got was Autolite AR2593 plugs (Autolite Racing). I will be running a mag and I was wondering how I'm going to properly set the plug gap, then I wondered the same thing even if I wasn't going to use a mag. Maybe I'm overthinking again but I'm stumped (again). Thanks!



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    Cantard 71hallett's Avatar
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    Your on your own. I dont know what to tell you.
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

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    Senior Member stix818's Avatar
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    We use to cut ours like that and gap it like you would any other plug for the most part. Your just gapping from the electrode to the strap. They just won't last as long.
    Last edited by stix818; 07-21-2008 at 12:25 PM.
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    Senior Member lilrick's Avatar
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    .020 from the center of the plug to the strap.

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    Quote Originally Posted by lilrick View Post
    .020 from the center of the plug to the strap.
    We run .018 with the old Vertex and never fail to fire right up......I just use a .018 feeler gage and lay it flat on the electrode........and set the strap to a slight resistance when sliding in and out. Be sure to index the strap away from the piston to eliminate any possible contact and to assist flame travel. ( I don't necessarily buy into the flame travel part, but it is what I've been told.......).......Ray

    PS as far as lasting, we're on the the third season with a set of Autolite Racing plugs. The last set, the old school type, lasted 15 years. They were still working just fine, but an engine explosion destroyed 2 of them, so I replaced the set.........
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    Senior Member ol guy's Avatar
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    .016-.018 Depending on the motor tune. If points .035. If electronic whatever the distributor manufacture recommends. Also curious as to what head you are running with that plug.M

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    Yep, I was overthinking again. Thanks.

    Quote Originally Posted by ol guy View Post
    ... Also curious as to what head you are running with that plug.M
    Pro Comp aluminum heads

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    Quote Originally Posted by hotrod56cars View Post


    Pro Comp aluminum heads
    Have you tried to install one of those into the head? You may end up needing a 39 series plug, 3924, 3923 are cheap "street" plugs(available at Autozone), 3911 and 3910 are "racing" numbers. They all are .750" reach, gasket seat 14mm plugs with the smaller 5/8" hex.

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    I've been running .020. I just opened it up to .025 w/ the new MSD mag. Been running 33* plug says it wants a little bit more, gonna try 36* and fatten up the top end. I'll let you live in my boat if you bring the Zommies.

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    Quote Originally Posted by obnoxious001 View Post
    Have you tried to install one of those into the head? You may end up needing a 39 series plug, 3924, 3923 are cheap "street" plugs(available at Autozone), 3911 and 3910 are "racing" numbers. They all are .750" reach, gasket seat 14mm plugs with the smaller 5/8" hex.
    Yea, you're right, 2 steps forward and three steps back. They don't fit. The hex is too big, I can't put a socket on them to tighten the plugs.

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    Quote Originally Posted by Blown Sanger View Post
    I've been running .020. I just opened it up to .025 w/ the new MSD mag. Been running 33* plug says it wants a little bit more, gonna try 36* and fatten up the top end. I'll let you live in my boat if you bring the Zommies.
    You can take that brand new MSD mag and ...

    Hi Terry, I'd have to at least stay in your Chevy for those zoomies. LOL

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    Quote Originally Posted by hotrod56cars View Post
    Yea, you're right, 2 steps forward and three steps back. They don't fit. The hex is too big, I can't put a socket on them to tighten the plugs.
    The "racing" plugs were like $4.50 each, and the 3923 or 3924 are easy to get, less than $20 for a set of 8. Don't know what engine, compression, etc you have, but maybe just get a set of the 3923.

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    Cantard 71hallett's Avatar
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    Any special reason you chose an autolite over an ngk? Here in the snow autolites are not that common. Special order actualy.
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

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    Quote Originally Posted by obnoxious001 View Post
    The "racing" plugs were like $4.50 each, and the 3923 or 3924 are easy to get, less than $20 for a set of 8. Don't know what engine, compression, etc you have, but maybe just get a set of the 3923.
    I got the racing plugs completely by accident, it was a parts house mix up. I paid the same price as "normal" Autolite's are priced.

    For Sale, set of 8 brand new Autolite Racing...

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