Its not hard to change rod legth, just get a different one. They come in many sizes, just look a littler harder

No man I'm sorry, more nitro makes it harder to tune, it closes the gap of actual fuel you have in methane, the more nitro the more methane you need to make the burn and since the amount of methane per volume is minimised, it makes it harder, there you have your math again

If you just leave it rich and run it as is becouse it has enough power thats another story, but to be able to get the perfect setting is easier with the leeser nitro %'s.

The amount of methanol needed per combustion can be obtained from the most efficient Air/fuel ratio for alcohol based fuels which is around 6:1. So in a 3.5cc engine it should be around 0.3cc of fuel per stroke's power section at the best volumetric efficiency. But thats not the point I made. What Stefan and I said is that nitro HAS oxigen in its chemical ecuation, and in a higher % than regular breathing air, so when you add more nitro you are fisically pushing up the % of oxigen that you have "available" to burn, so the fuel mixture leans and since the needles must be opened to add fuel and burn it with oxigen. Thus more fuel consumption occurs.

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