Possibly looking at some hp500s to put in my 311. Anyone have them in their 311s? What kind of mph?

Didn't have hp 500's but they were 454's stroked to 500 hp. Boat ran 75-76 spinning stock 27 Mirage's. Ran a best of 78.8 on GPS cool air about a 1/4 tank of fuel. Had nose cones on the outdrives.

I would agree, 75mph max, most days 73 or so. A 336 with 500s is lucky to hit 75 with a normal load

We spent the last year bolting in all new 735hp 572's in my 311 Crazy?? will see....

I had 311 with 500is hp 502's 75 mph gps turning 26 bravo1s

Remember that HP500's are are rated to something like 475hp?

HP500 Specifications :
Propshaft Horsepower: 470/350
Displacement (Liter/CID): 8.2/502
Cylinders: V-8
Bore (in/mm): 4.47/113
Stroke (in/mm): 4.00/102
Compression Ratio: 8.75:1
Fuel Requirements: 87 Posted Octane (R+M)/2
Full Throttle RPM Range: 4800-5200
Ignition Type: Thunderbolt V
Alternator (amps/watts): 55/776
Length (in/mm): 38.3125 /973
Width (in/mm): 32.75/832
Height (in/mm): 23.5/597
Weight (lbs/kg): 1305/592
Warranty: 1-year limited, 3-year limited corrosion