Fuel for ST3000  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> RC Fuels >> Fuel for ST3000
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Fuel for ST3000 - 7/5/2003 5:36:12 AM   
CadFlyer



Posts: 144
Joined: 12/7/2002
From: White Oak, TX, USA
Status: offline 		Can anyone tell me if a ST3000 will run on regular 10% nitro w/18% castor, I am speaking of the standard fuel that would be used in most .40 & .60 size engines. I have been told the big ST's need a special blend. thanks for the help.
cadflyer
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Fuel for ST3000 - 7/5/2003 9:53:22 PM   
RaceCity



Posts: 1842
Joined: 7/10/2002
From: NotUpNorth, USA
Status: offline 		According to my ST 4500 instructions, the first two gallons SHOULD be "full oil". Your 18% oil would be great.

After that...you can run less oil, but ST warns to "beware" of certain fuels labeled "ST BLEND" and what not....many do NOT have enough oil!

After the break in period, I'd stick with 12-15% oil content and leave it at that. Maybe a little less if the motor seems happy, but proceed with caution.

Good Luck.

'Race

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Fuel for ST3000 - 7/5/2003 11:00:40 PM   
CadFlyer



Posts: 144
Joined: 12/7/2002
From: White Oak, TX, USA
Status: offline 		I am using a some stuff called ST special blend by wildcat fuels. It is 5% nitro & 10% oil. Now, this seems like a little low on the oil content side of things. A fellow long time modler told me to use standard 10% nitro (18% oil) like can be bought at any hobby store. He said the big ST's run good on this combination.
I was hoping he is right so I would not have to special order the "Special blend" stuff instead of going down to my local hobby store and getting it right there.
thanks
cadflyer

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Fuel for ST3000 - 7/5/2003 11:12:09 PM   
RaceCity



Posts: 1842
Joined: 7/10/2002
From: NotUpNorth, USA
Status: offline 		I think your friend is correct. For sure, you won't HURT the motor with excess oil.

18% might be a little "fat" for long term use, but these 6-7-10% oils definitely seem a little thin for my tastes.

Again, I will refer to the instructions for the motor which specifically WARNS AGAINST excessively low oil content fuels...

ST is the final authority on this and I'd stick with their recommendations...

'Race

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AMA 63990

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Fuel for ST3000 - 7/5/2003 11:44:08 PM   
CadFlyer



Posts: 144
Joined: 12/7/2002
From: White Oak, TX, USA
Status: offline 		I agree with you. My instincts tell me that a low oil content in such a large engine isn't good. Thanks for your help.
cadflyer

(in reply to CadFlyer)
       Post #: 5

Fuel for ST3000 - 7/6/2003 12:19:29 AM   
RaceCity



Posts: 1842
Joined: 7/10/2002
From: NotUpNorth, USA
Status: offline 		Another thing you COULD do...

After the motor is broken in.....

Blend your normal fuel with some of the 10% oil fuel, and you'd get TWO gallons of +/- 14% oil fuel.

Just cuts down on having to stockpile a lot of "special" fuel.

Good Luck with it!

'Race

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Fuel for ST3000 - 7/9/2003 12:35:29 AM   
Bax


 

Posts: 12619
Joined: 4/26/2002
From: Champaign, IL, USA
Status: offline 		For the big 'Tigres, but not the G2300, you would want to use a fuel with no less than 15% oil content until the engine is well broken-in. This would be the first two gallons or so.

After that, you can use a fuel with 10%-12% oil content. When the engines came out, SuperTigre stated that the oil should be 100% castor oil, since that's all they'd used. We've found that any of the commercially-blended fuels of 10%-12% oil content are fine, as long as you get the high-speed needle set correctly and make sure you don't go lean of peak RPM.

Nitro can be 0%-10% and the engines will run well, though we've found that 5% seems to work out best as far as top-end, idle, and acceleration are concerned.

_____________________________

Bill Baxter, Manager Hobby Services/Futaba Service/North America
3002 N. Apollo Dr. Ste. 1 Champaign, IL 61822 USA
Service Phone: 217 398-0007
Email: hobbyservices@hobbico.com

(in reply to CadFlyer)
       Post #: 7

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