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Author Topic: Nitro - 5% vs 10% Pros and Cons  (Read 1067 times)

Offline ray copeland

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Nitro - 5% vs 10% Pros and Cons
« on: December 06, 2010, 10:20:40 PM »
What differences can i expect if i decide to try a gallon of 5% nitro vs my usual 10% , 22 percent oil 50/50 blend with a couple extra ounces of castor added? Should i expect longer run times, any lack of power that i would notice ? What about any help with profile runaways ?  My mix of engines are the usual fp's, la's, foxes and a few thunder tiger gp's. Thanks ,  Ray
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Ray from Greensboro, North Carolina , six laps inverted so far with my hand held vertically!!! (forgot to mention, none level!) AMA# 902150

Offline Alan Buck

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Re: Nitro - 5% vs 10% Pros and Cons
« Reply #1 on: December 07, 2010, 07:35:06 AM »
Ray 5% will give you better mileage and better for colder weather. 10% is better in warmer weather as it has more oxygen in it but you use more fuel and it needles a little better Alan
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ALAN E BUCK

Offline Steve Fitton

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Re: Nitro - 5% vs 10% Pros and Cons
« Reply #2 on: December 07, 2010, 08:05:19 AM »
You probably don't need the extra castor either, unless the engine you are using is an old McCoy or 35S.
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Online Brett Buck

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Re: Nitro - 5% vs 10% Pros and Cons
« Reply #3 on: December 08, 2010, 06:02:42 PM »
Quote from: ray copeland on December 06, 2010, 10:20:40 PM
What differences can i expect if i decide to try a gallon of 5% nitro vs my usual 10% , 22 percent oil 50/50 blend with a couple extra ounces of castor added? Should i expect longer run times, any lack of power that i would notice ? What about any help with profile runaways ?  My mix of engines are the usual fp's, la's, foxes and a few thunder tiger gp's. Thanks ,  Ray

     Significantly reduced power (have to run leaner to get the same power), and some likely difficulty starting in cold weather. Slightly softer break. And significantly better fuel mileage.
 
    Brett
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Offline phil c

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Re: Nitro - 5% vs 10% Pros and Cons
« Reply #4 on: December 14, 2010, 08:51:28 PM »
Ray, I would save the extra castor until needed(Fox, McCoy, etc).  For modern engines 22% oil should be more than enough.  Adding some extra castor can help tune the engine run.  On the LA engines it can smooth out the run and soften a 4-2 break.  Especially in hot weather it seems to tame things down(regardless of nitro).
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phil Cartier

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