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  1. #11
    JC Performance Engines Gold Member Stormrider's Avatar
    My Boats:
    2003 28 Pantera
    Join Date
    Jul 2002
    Long Island, NY

    Re: I know I shouldn't ask!

    Quote Originally Posted by Dave M
    Someone I know with a 45 Sonic with trip 500's told me he is burning 50 GPH at cruise.
    Dave, you know what cruise is??
    With great power, comes great responsibility.

  2. #12
    Registered formula1's Avatar
    My Boats:
    Formula 292-Sold! :(
    Join Date
    Apr 2001
    Southwest, FL

    Re: I know I shouldn't ask!

    Quote Originally Posted by dockrocker
    I've had similar bad thoughts about the Mack Daddy Formula 419 - just the *bling* factor might be worth it!

    But.... unless you can afford to wipe your bottom with $100 bills....
    I know, the 419 has a very big bottom! LOL!

    What is the optimum cruising RPM of the HP500? Whatever that RPM is, approx what speed would a triple engine 419 travel?
    Last edited by formula1; 10-28-2005 at 02:18 PM.

  3. #13
    Charter Member #34 Charter Member Dock Holiday's Avatar
    Join Date
    Oct 2000
    Beautiful North Carolina

    Re: I know I shouldn't ask!

    Quote Originally Posted by East Coast B
    Dock Holiday, what speeds are you running at those rpm's? Would like to to a mpg equation...... I'd expect to see 1mpg at best with twin 500's just going by the numbers they post in the magazines. And with trips, I would think you would be under 1mpg....

    So if you could post the speeds at your rpms, would appreciate it.. Have any numbers at higher rpms?
    3800 RPM = 50 MPH GPS 24 x 2 = 48 Gallons

    50 divided by 48 = 1.042 Mile Per Gallon

    5000 RPM = 70 MPH GPS 44 x 2 = 88 Gallons

    70 divided by 88 = .795 Miles Per Gallon

    By boat is a true deep vee. I would guess that the stepped hull guys who are running faster at the same RPM's would be more efficient?

    Hope this helps.


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