Since I can read correctly, I'll answer.
Originally Posted by
nitroexpress
Does ROAR regulate the maximum allowed nitro percentage as EFRA and IFMAR do? I couldn't find anything in the ROAR rules that indicate any fuel restriction.
No, there is no nitro % regulation that is generally enforced... most US tracks and races don't even follow ROAR rules anyway. The 9.1 rule just specifies the fuels composition.