Haha beau, I was just about to look it up, no luck so far...
That site used to be my homepage

At any rate, the books I have say it's got the Sabre IIB. I'll find more info after work.
EDIT: According to Spitfire-Performance.com (
Tempest Performance Data ), we've got our Sabre IIA Tempest, producing 2,180 hp at +10.5 lbs. boost according to the first Speed graph. Strangely, this is the Tempest (Sabre IIA) MAP reading with 150 grade fuel and is our Tempest in-game... max MAP = +10.5 lb./sq.in.
The Tempest (Sabre IIB) creates +11 lb of boost.
Tempest V (Sabre IIB) Data Sheet Now I have to get on finding out just how many Tempest V's used this Sabre IIB.