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glow plugs

Old 12-02-2006, 12:16 AM
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gooycheese
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Default glow plugs

I am wondering how important the postion of a glow plug is? I mean for example my dynamite engine the plug is about flush with the bottom of the button when screwed in. If the plug was say 1/8 inch away from the bottom of the botton would that make a big diffrence? The reason I ask is I took one of the glow buttons and made it to accept glow plugs, but the plug is about 1/8 inch away from the bottom is this ok or do i need to make it flush with the bottom of the button? Or do they make long threaded glow plugs? These are some pics of stock glow buttons, the modified one looks alot different. If anyone can help that would be awsome.



Thanks Paul
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Old 12-02-2006, 01:38 AM
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Ron Olson
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Default RE: glow plugs

What plug are you currently using? Companies make both short and long plugs. I use only long plugs but if they extend too far into the chamber adding an extra gasket will raise it.
A trick that Andy Brown came up with is to use an X-acto blade to bring a coil of the wire out so that it is better exposed to the fuel/air mixture. Do this with a new plug then heat it up a couple of times to let it temper the wire.
Old 12-02-2006, 02:13 AM
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Default RE: glow plugs

I am using an Mc Coy mc-9, I got about 1/8 inch before I even get to the chamber.
Old 12-02-2006, 07:34 AM
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Default RE: glow plugs

Would anyone know what would be considered a long plug? Or should I get my button machined?


Paul
Old 12-02-2006, 08:37 AM
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Default RE: glow plugs

the glow button is from your .09 isnt it,
Old 12-02-2006, 10:23 AM
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Default RE: glow plugs

Yes it is, I have modified it to accept a glow plug. Now I guess I need to know what kinda plug would work to replace a glow button? I did have the button turned down so now the glow plug with washer sits flush with the bottom of the button(looks the same as glow button originally just has plug for element now). The question is would a glow button be considered a hot plug or medium or cold?


Thanks Paul
Old 12-02-2006, 10:25 AM
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Default RE: glow plugs

An MC-9 is a long reach plug. K&B makes a short plug that is made for some engines that need them but most heads are already machined to use the long one. They're identified as the 1-L and 1-S.
Try the trick that I told you about above as it will help but be careful when pulling the coil out.
Old 12-02-2006, 10:31 AM
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Default RE: glow plugs

Okie Dokie I will try that Ron thanks


Paul
Old 12-02-2006, 10:48 AM
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Default RE: glow plugs

There are buttons made for high and low nitro use but only on a couple of engines that I know of.
The button isn't what determines what heat range the plug that you need, the amount of nitro does. I've found that the smaller the engine is, the more sensitive they are to having the right plug.

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