dyno numbers! whats real ?
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dyno numbers! whats real ?

  1. #1
    Senior Member
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    Default dyno numbers! whats real ?

    hey guys new to jet boats. i biult my engine [a 565 reher morrison short block 10.5 comp. i put a.f.r. 335 c.n.c. heads,cam(274,278 @50 and 750 lift,108 sep) c.n.c. victor and reversion plate and a gary williams 1050] was hoping for 850, made 782 hp and 694trq on gas and on vp chp it made 800 hp and 717 trq. iam still happy it made over 700 trq from 4500 to 5600 rpm. then the dyno guy said now my dyno does not correct for friction and inertia and i do know his dyno is the most conservetive in area . what the hack is he talking about ? he had no reason to sugar coat it, he had no part of biuld. iam biulding a 2003 tx20 warhawk and my goal is 100 mph ,the short block is set up for nitrous will i need it? would my dyno # be consider uncorrect or correct hp?

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  3. #2
    New here Beer:30's Avatar
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    I have always only paid attention to REAL-TIME hp. What it says in that room at that time. That is the closest you will be to being able to know what HP it is IN THE BOAT. Given altitude is similar. It would be RARE that you would be running the boat AT sea-level, on a STANDARD day (15*c / 60*f, 29.92 baro). So, what you actually SEE should be what you go by - IMO.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

  4. #3
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    thanks !

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