R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road

Reply
 
Thread Tools Search this Thread
Old 08-23-2009, 06:50 PM   #1
Tech Addict
 
sperera's Avatar
 
Join Date: Jul 2009
Location: Australia, Melbourne
Posts: 588
Trader Rating: 2 (100%+)
Default Glow Plugs

I did a search to try and answer my question but couldnt find what I was looking for.

I purcahsed some spare glow plugs for my 1:8 nitro buggy on weekend, got OS medium hot ones.

I dont understand the difference between the heat differences eg medium vs. medium hot.

Can someone explain to me the difference when when I should use which one?
sperera is offline   Reply With Quote
Old 08-23-2009, 07:08 PM   #2
Tech Master
 
pickle311's Avatar
 
Join Date: Aug 2009
Location: Austin, TX
Posts: 1,650
Trader Rating: 31 (100%+)
Default

I've been trying to find the same info and can't find anything. I don't know what plugs to use in my buggy.
pickle311 is offline   Reply With Quote
Old 08-23-2009, 07:53 PM   #3
Tech Master
 
sickpuppy1's Avatar
 
Join Date: Feb 2006
Location: Gardner,KS
Posts: 1,322
Trader Rating: 25 (100%+)
Default

Pages 1 and 2 help a bit...
http://findarticles.com/p/articles/m...g=content;col1

This one is very in depth but the last half is the best
http://www.iroquois.free-online.co.uk/gloplug.htm
sickpuppy1 is offline   Reply With Quote
Old 08-23-2009, 07:55 PM   #4
Tech Champion
 
Davidka's Avatar
 
Join Date: Oct 2004
Posts: 9,846
Trader Rating: 75 (100%+)
Default

Glow plugs are essensially the timing adjustment in an engine. A hotter plug causes the ignition charge to happen slightly earlier, a colder one causes it to happen slightly later. Medium and hotter plugs usually make for a better idle and a wider tuning window, colder plugs usually make for a crisper response and cleaner top end while more difficult to achieve a good idle. If you go too hot on the plug and too lean on the needle, you could have detonation.
__________________
"I have no idea what you're talking about, so here's a bunny with a pancake on it's head."

In mind and body, we're all heading towards old age. It is slower to go by bike.
Davidka is offline   Reply With Quote
Old 08-23-2009, 10:25 PM   #5
Tech Addict
 
sperera's Avatar
 
Join Date: Jul 2009
Location: Australia, Melbourne
Posts: 588
Trader Rating: 2 (100%+)
Default

Thanks for the info. Ill be keeping a closer eye on the element in my glow plug from now on.
sperera is offline   Reply With Quote
Old 08-24-2009, 04:29 AM   #6
Tech Fanatic
 
vladconnery's Avatar
 
Join Date: Jun 2008
Location: Charlotte, NC
Posts: 992
Trader Rating: 35 (100%+)
Default

Hot days 90's and high humidity = COLD plugs. Normal days below 90 with moderate humidity = med - hot plugs. It is important to change plug type with changing weather. Hot plug on hot days equal flame outs and vice versa Cold plugs on cool days equal flame outs.
__________________
KO PROPO EURUS
Kyosho: TKI3, TKIe Tekin RX8 Gen2
vladconnery is offline   Reply With Quote
Old 08-24-2009, 03:48 PM   #7
Tech Master
 
pickle311's Avatar
 
Join Date: Aug 2009
Location: Austin, TX
Posts: 1,650
Trader Rating: 31 (100%+)
Default

Quote:
Originally Posted by vladconnery View Post
Hot days 90's and high humidity = COLD plugs. Normal days below 90 with moderate humidity = med - hot plugs. It is important to change plug type with changing weather. Hot plug on hot days equal flame outs and vice versa Cold plugs on cool days equal flame outs.
It's 100+ here daily and I don't flameout with medium plugs. Head temp is around 220.
pickle311 is offline   Reply With Quote
Old 08-24-2009, 03:51 PM   #8
Tech Regular
 
markr04's Avatar
 
Join Date: Jan 2009
Location: TX
Posts: 421
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by Davidka View Post
Glow plugs are essensially the timing adjustment in an engine. A hotter plug causes the ignition charge to happen slightly earlier, a colder one causes it to happen slightly later. Medium and hotter plugs usually make for a better idle and a wider tuning window, colder plugs usually make for a crisper response and cleaner top end while more difficult to achieve a good idle. If you go too hot on the plug and too lean on the needle, you could have detonation.
best.answer.ever.

Glad to read that one.
__________________
Xray 808 2010 Spec - O.S. V-Spec Speed - Airtronics M11-DSSS
Losi 8ight-T 2.0 - RB Killer 9 - Airtronics M11-FHSS-2
Losi XXX-CR - Tekin RS / Novak Ballistic 13.5 - Airtronics M11-FHSS-2
markr04 is offline   Reply With Quote
Old 08-24-2009, 04:32 PM   #9
Tech Addict
 
sperera's Avatar
 
Join Date: Jul 2009
Location: Australia, Melbourne
Posts: 588
Trader Rating: 2 (100%+)
Default

that gives me something to work on, thanks for the info guys. got a couple of months before it starts to get hot here in Melbourne so ill stick with the medium hot for now, max temp its been here in last 3 months is 68f but in middle summer it hovers around 95f.

thanks again
sperera is offline   Reply With Quote
Old 08-24-2009, 04:51 PM   #10
Tech Fanatic
 
vladconnery's Avatar
 
Join Date: Jun 2008
Location: Charlotte, NC
Posts: 992
Trader Rating: 35 (100%+)
Default

Quote:
Originally Posted by pickle311 View Post
It's 100+ here daily and I don't flameout with medium plugs. Head temp is around 220.
Where is here? Also keep in mind every engine is a different as a finger print. If that's working for you then stick with it. Hot plugs for cool days and Cold plugs for hot days is a general rule not the law. Also keep in mind there is not a standard manufacturers rule for cold to hot plugs. One company's med plug is another company's cold plug.
__________________
KO PROPO EURUS
Kyosho: TKI3, TKIe Tekin RX8 Gen2
vladconnery is offline   Reply With Quote
Old 08-24-2009, 10:58 PM   #11
Tech Addict
 
sperera's Avatar
 
Join Date: Jul 2009
Location: Australia, Melbourne
Posts: 588
Trader Rating: 2 (100%+)
Default

Thanks again people, Ive got what I think I need to work with now and has me headed in the right direction.
sperera is offline   Reply With Quote
Old 08-25-2009, 12:53 AM   #12
Tech Addict
 
Join Date: Sep 2007
Location: Canberra, where the best clay is
Posts: 534
Trader Rating: 7 (100%+)
Default

hey sperera

i live in canberra and race all ova the east coast and i have only eva used #6 and#5 glow plugs all year round. but i supose its all up to tuning skill and personal prefrence.
rcmad2700 is offline   Reply With Quote
Old 08-25-2009, 06:10 PM   #13
Tech Addict
 
sperera's Avatar
 
Join Date: Jul 2009
Location: Australia, Melbourne
Posts: 588
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by rcmad2700 View Post
hey sperera

i live in canberra and race all ova the east coast and i have only eva used #6 and#5 glow plugs all year round. but i supose its all up to tuning skill and personal prefrence.
rcmad2700 thanks for the info, are those medium plugs? Sorry im new, I think my medium hot ones are #7 or 8, cant remember.

Would the plugs have anything to do with the running temp or more the idle and response?
sperera is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Novarossi engines thread EVOLUTION Onroad Nitro Engine Zone 5360 08-14-2017 11:48 PM
Eating through glow plugs today? A costly day.. Why? Mpowerz Nitro Off-Road 31 01-05-2008 09:20 PM
Odonnel Glow Plugs, any good? Cain Nitro Off-Road 10 08-02-2007 08:38 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 07:13 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net