Changing from 16% to 25% nitro fuel
I'm currently using 16% on my Nova Top 1/8 scale engine. But I would like to try 25%.
What I'm concerned about is that if the piston diameter has already been fixed to fit the sleeve for 16% fuel, when I changed it to 25%, the piston wouldn't fit tight to sleeve anymore. My understanding is higher the fuel content, the less the piston would travel upward before combustion.
I understand I would need to break in again and all but just worrying that 25% fuel wouldn't do any good. Please advise,
Capricorn LAB C03