asw7576

Long Body vs Short Body Glow Plugs ?

http://rc-mushroom.com/product_info....oducts_id=4521

or

http://rc-mushroom.com/product_info....oducts_id=4522

Long body for .21 engines while short body for .12 engines ??
Which type is better for humid, tropical and hot weather country ?

Thanks !

Roelof

I believe it is about the pinlength on the plug. A longer pin is a colder version compared to a plug with a shorter pin.

I see it as the short pin nr.7 is a 7 plug and the longer pin nr.7 is actual 7.5 in gradation

teamgp

Take a look at this web page.

From what I've read, the deciding factor between either short or long plugs, is more centered around nitro % content and then humidity. Finally, you choose the plug number based on temperature.

However, this is a general rule of thumb as different motors with different modifications, may work better with a plug type that normally wouldn't be recommended.

One thing I've found is that if your motor won't idle for more than a few seconds, without running the low end too lean, then you should try a hotter plug (lower number).

afm

The numbers and characters on the plugs, are the product number, wire thickness, and thermal range of the plug’s body. Example: The Novarossi C6TG (F) or (C)
Product:C (Conical)
Wire Thickness: 6
Plug Type: T (Turbo)
Plated:G (Gold)
Thermal Range:F (Fredda = Cold) C (Calda = Hot)

The plugs with cold thermal range F (Fredda), have a body with thinner walls and shorter body, so they dissipate heat better and faster to the engine head.
The plugs with hot thermal range C (Calda), have a body with thicker walls and longer body, so they dissipate heat better and faster to the engine head. The number of threads is the same on both types of plugs.


How to select the proper plug:
•When the ambient temperature is high, we have to use a plug with thicker wire.
•With higher compression, we have to use a plug with thicker wire.
•Humidity determines if we use a Cold (F) thermal range, or Hot (C) thermal range.
•With high humidity percentage we should use a Hot (C) thermal range plug.
•If we have high temperature and high humidity, we should use a plug with thick wire and a Hot(C) thermal range.

The best instrument to determine which Turbo Plug to use, is those table digital weather stations, that have Temperature, Humidity, and some also Barometric Pressure on them. That is the key to success or failure tuning engines with Turbo Glow Plugs, because they are so sensitive to weather variations that is unbelievable.

AFM

rcabj

iTrader: (1)

good write up AFM...

asw7576

Thank you AFM and everyone else.

I already order Novarossi short body C7TGF and OS P8 from RC mushroom.

LOL, I thought longer body has more coils inside

teamgp

For high humidity, you should be running the C7TC not the F.

asw7576

Arrghh...... perhaps you are right,

I thought F (Freda) means Cold, so implicitly, it has thicker wire / coils inside.