Im new!!! Need some help PLZ - Many questions! Thx!

HI i looked on the website and I see "Current Oil Percent" I have no idea what my oil is... but I fount this bit of info on the web;


Several years ago, we set out to develop a full line of competitive and sport fuels specifically for car applications. As a direct result of arriving at superior blends that utilize the Byron Proprietary Lubricants and the higher quality nitromethane and methanol available, Byron RACE has become the leading fuel in many countries where modeling on land is more practical than in the air. With the introduction of our Gen2 RACE fuels in 2008, Byron Fuels continues to lead the competition in On-Road and Off-Road.
Byron RACE Gen2 fuels are firmly entrenched in winner's circles everywhere -- if all car fuels were created equal, you wouldn't find this happening.
RACE 1600 Gen2 and RACE 2000 Gen2 are blended with 12% total lubrication while RACE 2500 Gen2 and RACE 3000 Gen2 are blended with an 11% total oil content. RACE 1600 Gen2 (16% nitro) and RACE 2500 Gen2 (25% nitro) are specifically designed for international competitions which limit the nitro percentages of 1/10 and 1/8 scale cars.

Also, can I stick with %25 percent nitro? If so do I need to increase my "oil" to 50%?
One more thing... what does it mean by "oil"? in our terms do we mean castor?

OIl or lube is possible to be many different brands and various blends

Castor OIL is one non synthetic that is generally needed in some quantity for most Cox and Many plain bearing 2 stroke engines

WWW.sigmfg.com has a selection of Pure Castor and KLOTZ full synth under "field equipment"---" Fuel Oil and lubricants"

Pharmacy Castor oil is OK to use but the price per Oz will make you wish you had bought a Quart from Sig or somewhere

Lets assume some simple math (above was a calculator to play with) but for now

you have 1 gallon ----128 Oz ------of a fuel blend that is 25% nitro and some possible range of Oil from 11% to 18% (typical for high RPM ball bearing racing engines)

25% of 128 is 32 Oz of Nitromethane

remainder is Methanol and oil ( we will assume mostly synthetic)

Lets assume the OIl is 18% of the 128 or 23.04 Oz

32+ 23.04 is 55.04 Oz so the rest, 72.96 Oz is Methanol

If we just ADD oil to try to make the total OIL near 22~28% (mostly Castor) we end up with more than the 128 Oz....and thus the amount of Nitro is diluted and the percent N goes down

so assuming we have 23 Oz of synth (18% oil) we need 25% total oil (32 Oz) we are adding 9 Oz of castor BUT this ends up being backward to our desire of mostly Castor

Cox .049 prefers total oil to be 20% to 29% and Mostly 50% or greater Castor. What we did adding only 9oz is make our blend now be 137 total Oz, slightly less Nitro %, and still have more synth than Castor

By now you are frustrated and need to know: Why the hell is Castor so important???!!!

And I want you to go read this link:

The first post by Randy Smith...READ ALL of it

http://stunthanger.com/smf/engine-set-up-tips/fuel-glo-plug-and-running-tips/

But don't get discouraged...Cox, Testors, or WenMac engines start, needle and run better with 25%~35% Nitro but they will start and run very well with as little as 5% Nitro

BTW a quart of Sig 25% N is a lot for a .049 and not that expensive to play with

I think by now you have the concept and ideas what you need to do to play with these amazing little finger slicing screamers....

YOUR next questions will be about Propellers....