Quote:
Originally Posted by winny
EDIT: I've also decided to get in touch with Rolls Royce at Derby to see if they have anything on wether or not a converted 100oct Merlin would run on 87 oct. The reason is that a lot of Squadrons used 2 stations. One where they stayed overnight and a forward base. If the conversion meant that a merlin wouldn't run on 87 then that would mean both stations would have to have had 100 oct, meaning more stations, more fuel, etc..
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They would probably thank you to include their hyphen.
AFAIK there would be no problem associated with running a Merlin on 87 octane post conversion provided that the appropriate boost limits were respected.
However, just filling up with 100 octane afterwards doesn't then cut the mustard as you'd have to clean the fuel system out. Otherwise you'd be running on a mixture which might be say 95 octane, potentially causing trouble at +12.
Therefore, I don't think people would make a habit of switching from one grade to another.