Conversion question
 

Hello fellow members
I'm new to this site and this is my first posting.
I have hear a few people talking at field about running a Glow engine with gas.
Want to know what's involve for such a conversion? Can it be converted and be reliable?

Thank
Jim

RE: Conversion question
 

You can look at this post and get some good ideas and see how it is beeing done.

http://www.rcuniverse.com/forum/m_6165393/tm.htm

Wellcome to RCU. You will love it. This is the best site on the web. If you do not beleave me just any one on this site lol

Paul

RE: Conversion question
 

Does the conversion has to be this complicated?

Jim

RE: Conversion question
 

I don´t think it is very complicated;

Insert glow adapter and four stroke glow plug. (Glow adapter is available from Horizon Hobbies for 10 bucks.)

Mix two parts of high test gasoline to one part of 10% oil -- 10% nitro glow fuel and fill your tank.

Open the carb needles about 3/4 turn more than normal.

Start engine and adjust as necessary.

AV8TOR

RE: Conversion question
 

Why do I need to use a 4 cycle glow plug? What is a glow adapter?

Looks like that guy changed the carburator, change the connecting rod, made modification to crankshaft. But now you are telling me different story. SO are you saying glow plug works with gasoline?

Jim

RE: Conversion question
 

i think he had a full glow conversion.
this will guzzel fuel and be $$.
of the other hand gas/glow as it is called will give you the a hybrid of glow and gas engines:D
a four stroke plug is needed becauase of the low methonal content in the fuel to keep the reaction going.
i recomend gas/glow over a full glow converstion.

shaun

RE: Conversion question
 

He converted to full gasoline/oil mix with spark ignition. He added needle bearings to the rod so he can run leaner oil ratios. The pumper carb makes it run more consistant with less dependance on tank position. When you run needle bearings the crank has to be a certain hardness, if memory serves me correctly around 60 rockwell. That's why he modified the crank. You can run the oil percentage higher and not do the needle bearing mod. That's what I am doing on my ST 51. You can also use a glow carb but it is more difficult to adjust and fuel draw can be an issue although it is not on my Super Sportster with the gasoline burning ST 51. The carb is more sensitive with it on gas but not so bad I can't use it. This type of mod is not for the technically challenged.

Edited to add: When converted to straight gas/oil the engine burns about half the amount of fuel it did as straight glow. The reason being, Stoicheometric fuel ratio for gasoline is 14.7:1 methanol is about 6.3:1 and nitro about 2:1. These are approximate but show why the fuel burn is less on gasoline.

RE: Conversion question
 

Well thank you all. This is not for me since I have no tools to do all these modifications.

Jim

RE: Conversion question
 

Sorry about that.... My "Bad". I didn't read your post carefully and I thought you were asking about converting a gasoline engine to Gas/Glow.

Take care,
AV8TOR

RE: Conversion question
 

The first thing we need to know is what engine are you converting?

The guy who did all the work on his engine started with an engine that needed 18% oil in his fuel
for the bearings and wanted to use gasoline and 3% oil.

If you are converting an engine that originally ran on gas and oil mix none of that other stuff is necessary.

There is some talent on this forum, don't be scared off. Stick around and ask questions.