Originally Posted by
Roelof
And yeas, the EU is talking about 16% by weight and not by volume making it arround 12%
Well, looking at a bit of EFRA's proposal:
Please, read this: “The content of nitromethane in blends with methanol and oil(s) intended for use as fuels for model vehicles is often given in percent by volume. It is difficult in practice to derive the corresponding content of nitromethane in percent by weight, since necessary parameters for the conversion are in most cases not known. Therefore, for the purpose of Regulation (EU) 2019/1148, fuel blends containing methanol, nitromethane and oil(s), intended for use in model vehicles and with not more than 12 percent nitromethane by volume, may be regarded as containing not more than 16 percent nitromethane by weight.”
Please, do note that unfortunately they are saying we will only be able to race with 12% fuel in volume.
Out of the Technical reports we do have, this “guideline” is non correct. It is wrong.
From a Fuel Producer: “it is known that the specific weight of technical nitromethane is 1,123 (there is a minimal ±), so to say that the parameters needed for conversion are not known is a complete nonsense.
The 16% by weight equals to a 14.248% by volume, but never a 12 % by volume. They're using a specific weight of 1.33 which is not correct, the right figure is 1.123 (no-one knows where they got it that 1.33 from).
So yea, even on-road will be affected by this change. Not by a lot, but all fuel across all classes will change with this. The scariest part though is that two contradicting numbers are used synonymously...
I don't know how much you guys struggle with cooling, but it was one of the main reasons none of my local guys went under 20% nitro even though there are many benefits in doing so (the difference in power is negligible while fuel economy goes up). In the US with their 30% blends it was possible to run engines with LCG heads in buggys which were overheating here even with only a 5% difference in Nitro.