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Nitro fuel percentages

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Nitro fuel percentages

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Old 03-11-2019, 07:51 PM
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Hello, I was looking at nitro fuel and I see a bunch of different percentages 20,25,30 etc. which one should I use for off road and why?

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Old 03-11-2019, 07:55 PM
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I run 30% because it has the most power and apparently the more nitro you have the cooler it will run. But on the other hand I would run what your engine manufacturer suggests.
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Old 03-11-2019, 08:07 PM
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Your best bet is to stick to what the Manufacturer suggests. I.e. Look at your Engine Pamphlet or Manual.
I race, and run 20% in my Truggy and Buggy. I run an OS Speed Spec III in both.

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Old 03-12-2019, 11:30 AM
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The most common for racing is 30%
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Old 03-16-2019, 07:37 AM
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Most engines only see a 200-300rpm gain for every 5% nitro you add. Since it’s hard to determine actual engine rpm on buggy engines, you have to judge by how fast your lap times are or how fast the truck can go in a given length of straight track. The reality is you get about 500-600rpm; maybe 1,000rpm more on 30% than you get on 20% and your tuning window is a little wider. But in racing, it’s not the engine you’re running, it’s your driving. I’m willing to bet a better driver using 20% nitro can beat a good driver using 30% nitro.

I’ve used fuels containing 0% nitro up to 50% nitro. I’ve found no real good reason to use more than 20-25% nitro as there is no significant benefit beyond a touch more power.

I’d suggest - for bashing - or even racing - a fuel comprised of 20-25% nitromethane, 11-12% oil, and a medium heat range plug. Ultra hot plugs are fuel wasters. Ive found in a bashing environment in the engines I run, a 60/40 blend of castor to synthetic oil to be ideal and I use hot body medium filament plugs like the Picco P6TH and Novarossi C6TGC/CTO6. Ive used a P6TC Picco plug off road and it ran just fine, but off idle had a little lag as the plug needed to heat back up. Hot body plugs retain more heat and have less lag.
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Old 03-16-2019, 07:58 AM
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OP, this is pretty simple. The higher the nitro content the more power you will have on tap. For some this is good, for most this is bad. I see a lot of racers just getting started in the hobby and they are ready to hit the ground running . There is nothing wrong with building a first kit with all premium running gear. But for most an os speed or novarossi or a premium reds on 30% is to much power. I see racers out trying to drive and they are just all over the place because they cant control what they are driving. If they only knew to much power is a handful. Now your Jared Tebo's, Robert Battle, Ryan Maifield , you get the point. Those guys can handle that kind of power.

I have ran 20-30% and ended up settling on 25%. Fuel can be used as a tuning option just as a hop up part. I dont do this but it is useful. If I am on a big high grip wide oped track I could see my self running 30%. On the opposite end if I am on a low grip surface where speed is not a factor just being able to drive and not crash I may go to 20%. But as mentioned I run 25% as it is a good middle of the road. I hope this helps you.
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