The cooling effect of MW50 allowed "higher boosts" to be used without detonation.
IIRC. The Bf109 could run MW50 for up to 10 mins at a time and had enough water reserves for 20 min total use.
In the same way, 150 grade fuel which the allies used late war in EUROPE worked in the same manner.
The additional cooling effect allowed higher boosts to be used without detonation.
Hence why I think the +18lb boost level on the Spitfire XIV should be re-instated as BST2 (with+ 21lbs as BST3).
If the spitfire xiv was safe to run at +21lbs for 5 mins WEP, it should be good for say 7.5 mins at +18lbs before engine overheats.
If you know anything about how the throttle body worked on a spitfire, you would realise that they were fully automatic.
As you increase the engine REVS with the throttle lever it automatically increases the pre-determined BOOST to match.
UNLIKE many American planes where you had to MANUALLY adjust engine RPM and BOOST!
