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Old 02-08-2007, 05:30 PM   #1
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Default Nitro % suggestions

I currently use Byron's Race fuel (20% nitro). If I'm going to start racing should I move to 30%? I see alot of, no actually make that most people, using 30% nitro vs 20% or 25%. Now obviously if there is a nitro limitation this won't apply. Generally speaking, if I'm racing and I'm new to racing. Should I just stick with 20% or go to 30%?

Also, how does running higher Nitro affect tuning? As I understand it the easy explination is that higher nitro requires slighter richer carb settings right? But with that is the engine noticably faster with 30%?

I did a search and I got more questions than I had originally before I searched.

P.S. I am going to stick with Byron's fuel after numerous recommendations and my prior experience with it.
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Old 02-10-2007, 03:39 AM   #2
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I found this info that might be helpful in answering your question:

http://www.horizonhobby.com/Explore/...ArticleID=1638

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Fuels with a higher nitro percentage, like 30% for example, burns hotter and creates more power, but the engine also consumes fuel faster and you have a greater chance of overheating your engine. 10% nitro burns cooler and is a little more efficient fuel, but it doesn’t create as much power. 20% fuel is a good all-around mix between the 10% and 30% as you’d assume; it burns hotter and creates more power than 10%, yet is cooler and doesn’t deliver as much power as a 30% fuel would.
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Old 02-10-2007, 05:40 AM   #3
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Default Nitro

I would say if your skill level is high go with 30% if not stay with 20% . The engine will be a little easier to tune and last a little longer on 20%.
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Old 02-10-2007, 06:07 AM   #4
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Quote:
Originally Posted by latemodel13
I would say if your skill level is high go with 30% if not stay with 20% . The engine will be a little easier to tune and last a little longer on 20%.
That's what I was wondering. Thanks.

That link was also pretty helpful. I use 20% now, but I don't race yet...if I was racing I was wondering if I should jump right to 30% but I wasn't sure. I'll stick with 20% for now.
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Old 02-10-2007, 10:41 AM   #5
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I would first check w/ the mfgr to see what your engine was designed for. If it is a true race engine, it will run better w/ 25 or 30%. Here's the problem. If you live here in the U.S. 25% race fuels are hard to come by. Byron's 30% Race is a very good fuel, but you should consider adding a shim (.10). Most high quality race engines are pretty easy to tune, even with 30%. I run a RB C6, and that engine is much easier to tune than my p.o.s. t-maxx engine!!

Last, if you bump up to 30%, you need to go through a short break-in process again.

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Old 02-11-2007, 07:39 AM   #6
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It's a JP Modified Mugen X12. I know it will handle 30%, but I was wondering if I needed that and if the difference would be immediate.

I'll try 20% to start off and see what happens.
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Old 02-11-2007, 10:19 AM   #7
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You don't need to stay with 20% if you aren't that experienced IMO. Just switch to a cooler plug, add a shim to prevent predetonation or pittingof the piston if the mfr setting is for 20%, and you'd have to richen up the engine a little. I swapped to 30% and it's very easy to tune. I didn't find it hard to tune at all and tried it with atleast 5 motors when I first swapped to 30. They all ran very well and a lot faster.
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Old 02-11-2007, 10:54 AM   #8
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Well, I have a fresh gallon of 20% that I just got so I'll use that up and then maybe switch to a 30% after.
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Old 02-11-2007, 11:46 AM   #9
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Good call. No need to waste something that's still good.
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Old 02-11-2007, 11:54 AM   #10
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Quote:
Originally Posted by HarKonnenD
Good call. No need to waste something that's still good.
Plus, at least I can get the feel of the car since it's still new to me, get the feel of the engine and all before I start tuning it to race etc. Know what I mean? I'm going to go through alot of fuel practicing.
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Old 02-11-2007, 04:01 PM   #11
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If you want 25 % nitro fuel get a quart of 20% and a quart of 30% and mix them together in equal amounts. make sure they are the same oils and oil content.
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Old 02-21-2007, 10:47 AM   #12
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Quote:
Originally Posted by MassiveMods
If you want 25 % nitro fuel get a quart of 20% and a quart of 30% and mix them together in equal amounts. make sure they are the same oils and oil content.
What about blue thunder fuel, don't they make the 25% mix. I am in Singapore and that seems to be a very popular blend. Not sure about the US?
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Old 02-21-2007, 02:44 PM   #13
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Quote:
Originally Posted by dr_catman
What about blue thunder fuel, don't they make the 25% mix. I am in Singapore and that seems to be a very popular blend. Not sure about the US?
In the US I have found 10%, 15%, 20% and then 30%. No 25% that I can see. There is a 33% (but it's the same as 30% and it's a crappy brand of fuel anyway. Traxxas).
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Old 02-21-2007, 03:27 PM   #14
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Default 25%

Rocket Science blends 25%. I use it in my Plus 35.
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Old 02-21-2007, 05:14 PM   #15
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Quote:
Originally Posted by fossil
Rocket Science blends 25%. I use it in my Plus 35.
I've never seen that fuel around here. Just Byron, Maxy, sidewinder and some of the lower quality brands generally is all i see.
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