glow plug differences?
03-15-2005 | 10:25 PM
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From: staten island, NY
glow plug differences?
duratrax offers 3 types, hot, medium, and cold. any idea on what the difference is.
the cold plug is gold, is that suitable for a nitro evader, or is that for some specific set up?
the cold plug is gold, is that suitable for a nitro evader, or is that for some specific set up?
03-15-2005 | 11:04 PM
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From: staten island, NY
RE: glow plug differences?
but what does that mean?
the gold plug which is the most money, is the cold plug. wouldn't you want a hotter plug so it glows more? or am i way off????[sm=confused.gif][sm=confused.gif]
the gold plug which is the most money, is the cold plug. wouldn't you want a hotter plug so it glows more? or am i way off????[sm=confused.gif][sm=confused.gif]
03-15-2005 | 11:11 PM
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From: Winnipeg,
MB, CANADA
RE: glow plug differences?
For colder temps you need hotter plugs. ask the guy you'd buy them from, which would be best. Although if he's n ot honest he may just try to give you the most expensive ones.
03-15-2005 | 11:37 PM
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From: staten island, NY
RE: glow plug differences?
ORIGINAL: Black_Ghost_FN
For colder temps you need hotter plugs. ask the guy you'd buy them from, which would be best. Although if he's n ot honest he may just try to give you the most expensive ones.
For colder temps you need hotter plugs. ask the guy you'd buy them from, which would be best. Although if he's n ot honest he may just try to give you the most expensive ones.
like if its 40 degrees outside, i would need a hotter then usaul plug?
03-16-2005 | 12:18 AM
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From: Winnipeg,
MB, CANADA
RE: glow plug differences?
The outside temp, I believe that would be correct. I'm quite new too. Its a learning experience. But be careful whos advice you take, some ppl dont know what theyre talking about.
I haven't had much problem chosing glow plugs. My local hobby shop just gives me the ones I need and I buy them.
I haven't had much problem chosing glow plugs. My local hobby shop just gives me the ones I need and I buy them.
03-16-2005 | 01:08 AM
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From: Carlsbad,
CA
RE: glow plug differences?
Nitro monkey was correct, generally you want the different heat plugs for the different nitro percentage. Although this is just the rule of the thumb.
03-16-2005 | 01:28 AM
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From: staten island, NY
RE: glow plug differences?
what category would 20% fall into?
EDIT!!
i see now what he meant up here. it didn't hit me what he meant up there by %'s. i thought he meant something like 10% hotter, 20% hotter... etc.
EDIT!!
i see now what he meant up here. it didn't hit me what he meant up there by %'s. i thought he meant something like 10% hotter, 20% hotter... etc.
03-16-2005 | 09:26 AM
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From: Middletown,
OH
RE: glow plug differences?
Also for cold weather just wrap a peice of aluminum foil around the heatsink while warmup. It makes the battery for the starterbox happier and my life easier! I personally run a medium plug cause they are more stable than a Hot Plug and can hold up to the warmer days pretty easy. They are pretty good cause they arent as affected as say a MC-59 on a temp change. It many make it a bit harder to start but when you tune accordingly it should still start right up (mine does)
I run 20% O' Donnell[>:]
I run 20% O' Donnell[>:]
03-17-2005 | 12:39 AM
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RE: glow plug differences?
For most small block engines (.12-.18) and hot or medium plug is usually the best choice. Both of those work very well with 20% nitro in most enignes. You don't need more nitro than that because the benefits are limited compared to a larger list of negatives. With 20%, a hot plug is usually a good choice.
On the cold weather thing:
Cold air is more dense than warm air, this requires a richer needle setting to maintain the correct fuel/air mixture. With that being said, in every stroke you are getting a more power packed charge in the cylinder. This does not warrant using a hotter plug. A hotter plug will increase your engine's timing which is already elevated due to the dense air. If any changes are to be made, a colder plug would be a better choice to retard the timing.
The opposite is true for hot and humid weather. Hot air is less dense than cold, and humid air is less dense than dry. This means leaner needle settings must be used to maintain the correct fuel/air mixture and with the light air, less compression would retard the timing, requiring a hotter plug.
On the cold weather thing:
Cold air is more dense than warm air, this requires a richer needle setting to maintain the correct fuel/air mixture. With that being said, in every stroke you are getting a more power packed charge in the cylinder. This does not warrant using a hotter plug. A hotter plug will increase your engine's timing which is already elevated due to the dense air. If any changes are to be made, a colder plug would be a better choice to retard the timing.
The opposite is true for hot and humid weather. Hot air is less dense than cold, and humid air is less dense than dry. This means leaner needle settings must be used to maintain the correct fuel/air mixture and with the light air, less compression would retard the timing, requiring a hotter plug.
03-17-2005 | 12:46 AM
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From: Fresno,
CA
RE: glow plug differences?
Think of it this way.. it'l make it real easy. It is NOT that actual way it works and makes NO real sense... but its easy to think of it this way if you don't feel like actually understanding it.
Ok so imagine your running 30% nitro right? Oh no! More nitro = a hotter engine! I better get a colder plug to cool it down!
vs
Im running 10% nitro. Oh no! My engine is running too cold! I better get a hotter plug to warm it up!!
Im running 20% nitro. Hmm.. well.. that's juusst right.. lets throw a medium plug in there to keep it happy.
There is my crazy way of thinking about it.
Ok so imagine your running 30% nitro right? Oh no! More nitro = a hotter engine! I better get a colder plug to cool it down!
vs
Im running 10% nitro. Oh no! My engine is running too cold! I better get a hotter plug to warm it up!!
Im running 20% nitro. Hmm.. well.. that's juusst right.. lets throw a medium plug in there to keep it happy.
There is my crazy way of thinking about it.
03-17-2005 | 01:09 AM
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From: staten island, NY
RE: glow plug differences?
ORIGINAL: yoster
There is my crazy way of thinking about it.
There is my crazy way of thinking about it.
i think i got it guys. thanks for the info. i've been using hot plugs, and its been fine. if i experiment, i'll try the medium.
03-17-2005 | 01:11 AM
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From: San Juan Capistrano,
CA
RE: glow plug differences?
ORIGINAL: gubbs3
For most small block engines (.12-.18) and hot or medium plug is usually the best choice. Both of those work very well with 20% nitro in most enignes. You don't need more nitro than that because the benefits are limited compared to a larger list of negatives. With 20%, a hot plug is usually a good choice.
On the cold weather thing:
Cold air is more dense than warm air, this requires a richer needle setting to maintain the correct fuel/air mixture. With that being said, in every stroke you are getting a more power packed charge in the cylinder. This does not warrant using a hotter plug. A hotter plug will increase your engine's timing which is already elevated due to the dense air. If any changes are to be made, a colder plug would be a better choice to retard the timing.
The opposite is true for hot and humid weather. Hot air is less dense than cold, and humid air is less dense than dry. This means leaner needle settings must be used to maintain the correct fuel/air mixture and with the light air, less compression would retard the timing, requiring a hotter plug.
For most small block engines (.12-.18) and hot or medium plug is usually the best choice. Both of those work very well with 20% nitro in most enignes. You don't need more nitro than that because the benefits are limited compared to a larger list of negatives. With 20%, a hot plug is usually a good choice.
On the cold weather thing:
Cold air is more dense than warm air, this requires a richer needle setting to maintain the correct fuel/air mixture. With that being said, in every stroke you are getting a more power packed charge in the cylinder. This does not warrant using a hotter plug. A hotter plug will increase your engine's timing which is already elevated due to the dense air. If any changes are to be made, a colder plug would be a better choice to retard the timing.
The opposite is true for hot and humid weather. Hot air is less dense than cold, and humid air is less dense than dry. This means leaner needle settings must be used to maintain the correct fuel/air mixture and with the light air, less compression would retard the timing, requiring a hotter plug.
in general you want to run the hottest plug possible without causing the engine to detonate.
for.12-.18 engines you want to use a hot plug or medium plug for higher nitro.
However, I do use a hot plug and 30% nitro in my big block engines with no problems. This is because I've plenty of head clearance and do not have to worry as much about detonation.
When you run a hotter plug, you're actually advancing the timing like gubbs said.
If you run too cold of a plug, you will find that you'll have to tune the engine leaner in order to produce the same amount of power. This is why you want a hotter plug because as most people know, running an engine lean is not good for lubrication.
10-11-2005 | 02:11 PM
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From: Palm Coast,
FL
RE: glow plug differences?
Hi guys, I know this is an old thread and maybe somebody posted already this somewhere else, however if you are interested take a look at the link below to understand more about the plugs.
http://www.fubarhill.com/GLOW.htm
http://www.fubarhill.com/GLOW.htm
