Hello. I think that 18% of castor oil and 10% of nitro would be good, but there is a little problem: the compression ratio and the steaming of E85 and air. the compression have to be raised from 9:1 to 13:1 and steaming from 1:1 to 1:6 (both require some serious mods in the cylinder volume and carburetor).

resuming: I quit doing this conversion, due to the poor resulting performance after the conversion and the amount of work doing this...

sorry by the english I´m from Brazil.

good flying out there.