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  1. #1
    Registered Harper220's Avatar
    My Boats:
    2001 28 TD Daytona
    Join Date
    Jun 2003

    Performance gain predictions, 28 Daytona w/Raylar 496 HO's?

    I've been kicking around adding the 496 HO Raylar kits. I need some input based on current stock numbers and possible expected gains after adding the kits.

    Here's what I got: 28 Daytona 496 HO's XZ drives, no boxes and prop shafts even with bottom of boat running 29p Hydro P5X's.

    Current #'s
    3000 rpm's = 52 mph
    3500 rpm's = 62 mph
    4000 rpm's = 72 mph
    4900-5000 = 90-92 mph WOT

    The kits are said to raise the 496 HO to 525+ hp and 610 ft. lbs. torque @ 3800 rpm's. I definitely want the reliability with 87 octane and no super chargers.

    I figured if the kits allowed me to add 3-4 pitches, I would see at least a 10 mph gain at 3000, 3500 and 4000 rpm's with the possibility of 12-15 mph at WOT.

    Any predictions would be appreciated...

  2. #2
    A to Z Platinum Member Sean H's Avatar
    Join Date
    Apr 2004

    Re: Performance gain predictions, 28 Daytona w/Raylar 496 HO's?

    what does a 28 w/ 525's run? i would assume you would be real close to that...

    and you might not end up adding as much prop as you think, but turning more rpm....

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