RE: West .50V1 bench run
The old Aeromodeller review of the Conquest .15 RC lists it as having the highest specific power output of any RC engine to date. The Fox .74 always used to show up well on those tests, which are not skewed by the tender massage and methanol-doped bean oil they need to run.
I recall that test or at least a column on the subject. I believe the Sport Jett .46 when reviewed caused quite a stir with its speed range (6:1? >6:1?) and power output compared to the status quo.
Bob27s commented that the Jett .50LX and West .50V1 are timed for similar operating ranges. I'd imagine the SJ .50 and Webra Speed .50 are of a similar ilk as well. I'd still bet on the Jett but they're all fine engines.
MJD