Wondering what is recommended as reasonable lower limit for castor content in fuel for AAC set-up for FF running, (engine in mind is Cyclon .8 & 1cc, factory diesel version). Appears to have plain, unbushed rod big end! If castor/synthetic is advisable; What ratio? We used to run 6%castor/6%
K&B X2C in one of Henry's "Mark 100s" (IIRC). But that was for 4minute plus running time, and going for economy, not max rpm as in 6 second FF run. TIACheers;d-d