hp vs mph

[tomcei]

I have a 1980 youngblood gull and I'm fixin to fire up a BBC mtr that we just dropped in. I have zero experence w/ jets and wondered if you could tell me what to expect for performance. The mtr is approx 500-525 hp.
I think the impellor is a b but cant remember. assumimg this boat has the correct impellor in it what shoud she do? It also has a set back pump, diverter, and ride plate. oh yea its got a loader too
thanks

[Sleeper CP]

I have a CP Gullwing 19'. I would guess around 80 mph or upper 70's at least. Maybe someone with the same power rating as yours will give you a closer estimate, but close to 80 mph should be close I would think.
Sleeper CP

[Sleeper CP]

I just took an EWAG(educated wild ass guess) at this, but someone out there has to have a combo close to this. If so, give the man a hand would ya.
What do you think ? :)
Sleeper CP