Jay C
PV has 2 185 gallon tanks. I've only had the boat since July of this year, so I can't give you accurate fuel burn, but if you use 1/2 pound of fuel per horsepower per hour at WOT, I'd be using 1150 pounds an hour. That's about 200 gallons an hour. Of course, only racers run at WOT for extended times.
As for speed, the only indicator I had until the end of the year was the time I was running with a new 51' Outer Limits. After a while, we got together and he said he was showing 104. Not bad for an 18,000 pound boat, eh? Now I have a GPS, so I'll check myself out.
I broke an exhaust valve spring near the end of the season, so the only time I read speed, we had 4-5 footers out on the lake. Nobody else was out there except for a blo boater or two. I was hauling along at 70 mph gps, going over the waves so nicely.
I was told that this boat, when it was rerigged with these engines new, was clocked going to Key West at 110 mph, with the entire cabin filled with luggage.
I'm in the process of freshening up the engines now - new valves, valve springs, rings, bearings, oil pump, etc. The last idiot that freshened the engines up used silicone sealer everywhere. One of the engines was always about 10 psi less oil pressure at wot than the oetehr two. I suspect I will find the pick up full of squeezed out silicone on that one.