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Old 05-04-2010, 11:44 PM   #1
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Default 25% or 30% nitro

hey guys

new to rc racing i have an OS speed hara edition just wondering is there much difference between 25% and 30% nitro. With which nitro content will the engine run cooler and have more run time.

Has anyone heard or tried Meccamo fuel is it a good fuel. Being in australia we have a very very small choice of fuel brands we can go for most of them are a LHS brand (not saying they are bad) i just wanted to stick with a proven brand on the world scale. I also have the option to get 25% sidewinder but cant get any 30%. Any help would be appreciated.
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Old 05-04-2010, 11:48 PM   #2
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25% will give you better runtime at the expense of bottom end.
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Old 05-05-2010, 01:04 AM   #3
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Default 25%

I do not see the need to use 30%. Just make sure the fuel has at least 10% oil and 50/50 mix of castor and synthetic, JMO....
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Old 05-05-2010, 01:36 AM   #4
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Since switching to Meccamo fuel i have never looked back, I use the 25% offroad and what they say about it keeping your engine internals clean is true

Like yourself i just wanted to use a world renowned fuel with a very good name.. Thing is its not very dear either at about $60 for 5 litres

I too am in Australia


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Old 05-05-2010, 01:42 AM   #5
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hi dave
thanks allot for that you just helped me make up my mind will be picking up my meccamo fuel tonight. Did you notice anything when switching to meccamo with tune and temps etc?
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Old 05-05-2010, 03:44 AM   #6
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I really cant tell you about tune because i started using Meccamo on a new engine,

My engine does seem to hold its tune extremely well and the temps i think if anything are down by comparison to other fuels i have used... On average i see about 105 degrees c but man i dont tune to temps.. just take note and use it as a rough guide if need be

The engine allways seems to respond well at all times and will idle for long periods and accelerate without hesitation, I honestly think i could garantee you will never change fuel brand again afer running Meccamo

I have hardly had or perhaps have never had any flame outs.. the only times i have flamed i have had clutch issues so it may have been the clutch contributing

One thing Meccamo say about their off road fuel is how clean it keeps the engines internals and i can vouch for this because after 15 litres the inside of my engine looks all but new


Happy days




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Old 05-05-2010, 04:02 AM   #7
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Since the thread is about 25 or 30% nitro, would someone change nitro content in the same (off-road) engine (I own a VZB-Vspec and a +4) depending on outside temperature?
I alway run 25% (also meccamo and very very pleased with it) - if there is extremly hot or cold would someone consider ie in hot to go with 25% and in cold with 30%?

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Old 05-05-2010, 04:41 AM   #8
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30% runs cooler.
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Old 05-05-2010, 06:07 AM   #9
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i run 25% & love it....just the right formula..
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Old 05-06-2010, 11:32 PM   #10
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any one use RB fuel?
any thoughts? i heard its made by the same people that make Meccamo fuel?
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Old 05-07-2010, 02:08 AM   #11
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bump
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Old 05-07-2010, 06:46 AM   #12
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From what i understand you are correct , Meccamo make rb fuel to their (rb,s) standards


Many guys using rb fuel out here and love it



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Old 05-07-2010, 06:54 AM   #13
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what bugs the crap out of me is alot of fuels do not say the amount of oil is in it. If i could run 25% i would, but every hobby shop withing 500 miles it seems only sells 20 or 30% heck i can even get 10%


can you mix 20 and 30 and get 25?
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Old 05-07-2010, 08:10 AM   #14
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Looks like amain took the Byron's 25% quarts of there site, they still have it in gallons though I wonder for how long? I guess it doesn't matter though because 25% is for International races where they limit nitro content, and since I race in North America I don't need it.
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