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Old 07-16-2007, 12:08 PM   #1
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Default Hot or Cold Plug?

What are the differences between hot and cold glow plugs?

When and why would I use each?

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Old 07-16-2007, 12:24 PM   #2
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Default Cold glow plus are colder :)

The difference between hot and cold glow plugs is the amount of heat they hold. By changing the glow plug from cold to (let's say) medium, ignition timing will change - will happen faster in the cylinder (given that you don't modify the needle settings), or will happen at a lower pressure.
A hotter plug will allow for faster acceleration if the engine is retuned after changing it.

Edit: I would recommend to use the glow plug supplied with the engine in the beginning, or if one is not supplied, use the one that the manufacturer recommends. After you break in the thing and tune it well, try to increase the heat range just a little bit (from cold to medium cold, from medium cold to medium and so on). See how the engine behaves (torque, heat), make sure you retune the engine after changing the plug.

Regards,
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Old 07-16-2007, 12:35 PM   #3
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Right on. That makes sence. I apreciate ya helping me out. Thank you.

-T
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Old 07-16-2007, 01:13 PM   #4
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Quote:
Originally Posted by p_mihai_ro View Post
The difference between hot and cold glow plugs is the amount of heat they hold. By changing the glow plug from cold to (let's say) medium, ignition timing will change - will happen faster in the cylinder (given that you don't modify the needle settings), or will happen at a lower pressure.
A hotter plug will allow for faster acceleration if the engine is retuned after changing it.

Edit: I would recommend to use the glow plug supplied with the engine in the beginning, or if one is not supplied, use the one that the manufacturer recommends. After you break in the thing and tune it well, try to increase the heat range just a little bit (from cold to medium cold, from medium cold to medium and so on). See how the engine behaves (torque, heat), make sure you retune the engine after changing the plug.

Regards,
does a hot plug affect fuel consumption? less run time with a hi tplug or the same?

and is there more engine wear?



btw wyle, nice sig
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Old 07-16-2007, 01:53 PM   #5
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http://www.rctech.net/forum/showthread.php?t=166838
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Old 07-16-2007, 02:27 PM   #6
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Quote:
Originally Posted by JetMD View Post
Remarkably useful. Thank you.

-T
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Old 07-16-2007, 03:01 PM   #7
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this will help to shows the range in humitity and air temp http://www.outlawrc.com/glowplugs.htm
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Old 07-16-2007, 08:45 PM   #8
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that was awsome!

thanks, that answered my ??'s
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