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 Rank: Pro Groups: Joined: 24/08/2009 Posts: 48,051 Points: -13,308
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Glow plugs:
Getting the best engine performance from your engine means choosing the right glow plug, which depends on a number of different factors – the engine type, air–fuel mix, fuel nitro percentage, and even the ambient air temperature. What's more, the right glow plug will change as conditions change.
Keeping a range of glow plugs on hand will help you fine–tune glow heat and enjoy maximum performance under all conditions.Generally, hot plugs provide better idle and acceleration than cold plugs. Cold plugs will produce more power but may idle more roughly and be harder to tune. The glow plug provided with the engine of your Hummer H1 is an R5.
Glow plug tips:
Use the right glow plug. Tune your engine carefully. Running too lean will make your engine ‘blow’ plugs more often, (proper tuning helps extend plug life). Never touch the filament of a glow plug, even when cold. Don’t over-tighten your plug. Tighten it until it’s just snug.
Be sure to include the glow plug seating gasket. A plug that’s too close to the piston can cause detonation, which will quickly damage a glow plug. Use only a glow starter of 1.5 volts to heat your plug, otherwise, your plug may burn out ahead of its time.
During the break-in process, it's quite common for the glow plug to die.
To check the plug, remove the plug from the engine, then lightly hold the threaded end of the plug with pliers and touch it into the end of the glow starter. If the glow plug element glows red, it is okay, and if it does not glow, it is dead and you need to replace it.
A link to one source of glow plugs. For the GX21 an R4 and R5 is a good start point, (the engine comes with an R5).
http://www.modelsport.co...-categories/9930/993030
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