87(AKI) octane in a 914
(Note, I have no intention of doing this, I was just reading https://www.rotax-owner.com/en/912-914-technical-questions/6136-912ul-fuel-octane-requirements and it got me to thinking about my 914.)
The Rotax 914 is said to be a 912UL with a turbo. If the turbo freezes, or the wastegate is stuck 100% open, the engine is rated to make max 80hp, down from 115.
In this scenario, with 0psi of boost, could 87AKI octane be used (instead of the required 91AKI)? In other words, is the 914 literally a 912UL with a turbo bolted on, or are there still other changes such as spark timing which differentiate the two?