Mercury's (Noah's?) formula for speed is:
Hull efficiency (Assume 250 for a late model V-hull)
______________________ (divided by)
Square root of:
As a base line, an 8500 vee hull with fuel and 2 passengers with twin 525 EFI (really 540HP ea +/-) with a "250" hull efficiency = 89.1 MPH (hull efficiency is a constant)
The same twin engine "Rayar powered" boat (assumes right balance) with same 1080 HP but 1000 lbs less (7500 lbs) total weight = 94.9 MPH
Maybe Raylar just needs a better marketing program...