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Glowplugs - Page One

We stock the excellent 'Fire Power' and 'Max Flash' range of glowplugs from Model Technics, available in a range of heat ratings, and a selection of the best in the world from O.S. Engines.

DEFINITION OF HOT AND COLD - If an engine is adjusted to run well on plug A: And when plug B is substituted it is noted the needle valve must be leaned to get equally good running: Then plug A is said to be `hotter than plug B. Plug B is `colder' because the element needs the extra heat, generated by the leaner mixture, to reach the optimum operating temperature in the required time.

CORRECT SELECTION OF HEAT RATING can give up to 2000 rpm power increase and improved throttling. Too cold a plug will cause loss of power and or poor throttling. TOO HOT A PLUG will also cause loss of power and or poor throttling but, additionally, it can cause pre-ignition, overheating and detonation leading to FAILURE OF THE PLUG and DAMAGE TO THE ENGINE. When a needle valve is leaned, the leaner mixture heats the plug element faster and advances the ignition. Maximum power is achieved when the ignition timing is optimised. If the plug is too hot, then, although the timing can be optimised the mixture is still too rich for absolute maximum power. But, if the needle is further leaned, then the ignition becomes too advanced and again loses power. With the FIREPOWER RANGE it is possible to fit a colder plug so that when the needle is leaned to give optimum timing, it also gives optimum mixture AT THE SAME TIME and thereby gives ABSOLUTE MAXIMUM POWER with extremely good throttling.

SELECTION OF THE CORRECT PLUG can only be made by testing and in most cases the plug that produces the highest rpm is the best choice. Other parameters to look for are:- lowest reliable idle speed; cleanest pick-up from idle having allowed time for the engine to cool; strongest mid-range pick-up and an uncritical main needle setting. HIGHLY TUNED RACING ENGINES will probably require an F2, F3 or F4. HIGH PERFORMANCE CONTEST ENGINES F3, F4 or F5. HIGH POWER SPORTS ENGINES F4, F5 or F6 and REGULAR SPORTS ENGINES F5, F6 or F7. But there are many exceptions to these suggestions, so don't be afraid to experiment - though be careful to avoid detonation when trying hotter plugs by setting the needle a little on the rich side. Two important factors that influence the choice of plug: If the NITROMETHANE content is increased significantly a colder plug will be needed if the COMPRESSION RATIO is reduced a substantially a hotter plug will be needed.


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O.S. No. 8 (Medium)
GP16
Without doubt the best glowplugs money can buy with no compromise in construction, quality, rteliability and longevity.
The choice of thousands of modellers worldwide.

The No. 8 is a medium heat rating plug, and certainly the most popular in the range.

 

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O.S. No. 10 (Cool)
GP17
Without doubt the best glowplugs money can buy with no compromise in construction, quality, rteliability and longevity.
The choice of thousands of modellers worldwide.

The No. 8 is a cool heat rating plug.

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O.S. Type F (Four Stroke)
GP18
The definative plug specially designed for four stroke engines. Long reach with heavy duty element this is widely regarded as the best four stroke plug available.

suitable for use with fuels up to 15% nitromethane content.

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Model Technics SUPERCAT
FOUR STROKE PLUG
GP15
Supercat plugs are one of the best 4 stroke plugs you can buy. with a Supercatalytic Coil these plugs give up to 100rpm more, with a very dependable tickover and strong throttle response. Capable of being used with between 0-30% nitro fuels this is probably all the plug you will ever need for your 4 stroke.

 

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Model Technics Firepower F2
EXTRA COLD Glow Plug
GP1
Model Technics FirePower - the sports plug that thinks it's a contest plug.
So whether it is to win championships or for Sunday afternoon recreation - FirePower is a great choice. 1.2-2 volts.

Available in a wide range of heat ratings, there is sure to be a Firepower plug to suit everyone!

 

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Model Technics Firepower F3
COLD Glow Plug
GP2
Model Technics FirePower - the sports plug that thinks it's a contest plug.
So whether it is to win championships or for Sunday afternoon recreation - FirePower is a great choice. 1.2-2 volts.

Available in a wide range of heat ratings, there is sure to be a Firepower plug to suit everyone!

 

£
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Model Technics Firepower F4
COOL Glow Plug
GP3
Model Technics FirePower - the sports plug that thinks it's a contest plug.
So whether it is to win championships or for Sunday afternoon recreation - FirePower is a great choice. 1.2-2 volts.

Available in a wide range of heat ratings, there is sure to be a Firepower plug to suit everyone!

 

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Model Technics Firepower F5
MEDIUM Glow Plug
GP4
Model Technics FirePower - the sports plug that thinks it's a contest plug.
So whether it is to win championships or for Sunday afternoon recreation - FirePower is a great choice. 1.2-2 volts.

Available in a wide range of heat ratings, there is sure to be a Firepower plug to suit everyone!

 

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Model Technics Firepower F6
WARM Glow Plug
GP5
Model Technics FirePower - the sports plug that thinks it's a contest plug.
So whether it is to win championships or for Sunday afternoon recreation - FirePower is a great choice. 1.2-2 volts.

Available in a wide range of heat ratings, there is sure to be a Firepower plug to suit everyone!

 

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Model Technics Firepower F7
HOT Glow Plug
GP6
Model Technics FirePower - the sports plug that thinks it's a contest plug.
So whether it is to win championships or for Sunday afternoon recreation - FirePower is a great choice. 1.2-2 volts.

Available in a wide range of heat ratings, there is sure to be a Firepower plug to suit everyone!

 

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NEW! P3D 3D and Inverted Engine Glowplug (2-Stroke) (Warm/Hot)
GP8
A great new plug from Model Technics. Especially designed for inverted 2 strokes, and high performance 3D models. Helps prevent the 'fire' going out in situations and manoeuvres where the engine is prone to flooding. So if you have problems in these situations try a P3D!
Suitable for fuels with a 5 to 25% Niro Mix.

 

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