dyno????
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dyno????

  1. #1
    Senior Member hotbo's Avatar
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    Default dyno????

    okay for all you fellas that dyno your mills alot.

    how much horsepower do you think you are leaving on the table by not dynoing your mill

    we have never dynoed our 496 set-up according to impeller charts we are making right around 700hp.

    so this winter we are thinking of taking it to the dyno shop and having it tuned in and see what it likes and dis-likes as far as jetting,fuel,oil,timing.

    maybe even a t-ram set-up while we are playing.

    is it worth 400 bucks and a days drive,plus a day to tune

    the shop we will be using is scott seastrums dyno shop he uses out of atlanta texas.steve smith.

    thanks guys

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  3. #2
    Resident Ford Nut Sleeper CP's Avatar
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    Quote Originally Posted by hotbo View Post

    is it worth 400 bucks and a days drive,plus a day to tune
    The best $400 bucks you'll spend the next best is a crank trigger.

    Travis one of the best things about the dyno is just knowing the engine is running correctly. How many times have you put an engine in a boat or car and you have a gremlin to chase. You don't know if it's the carb or ignition. Well, after the dyno secession you can rule out one or both if you take your own ignition.

    Drop the engine in the boat and you know that that piece of the puzzle is sound. Along that note I had guesstimated the power of the 565 to be between 920-945 before it went on the dyno, but I had a baseline to work from when it had made 855 HP. I was happy when it put out 935 but without the dyno it was just a guess and I wouldn't have known peak trq was 765 at 6,000. That's one reason why I had the impeller trimmed to spin 6,200 off the Nos. It's in a sweat spot for the engine to rev.

    Anyway, for tuning purposes and bench racing it's the best $ 400.00 you'll spend. Then buy a crank trigger for anything with a roller cam or anything reving over 6,000.

    Just my .02

    S CP

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  4. #3
    I'm No Expert Shaun's Avatar
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    Tunning... Well bigs performance dialed my carbs in perfect so i didnt have to change a thing. I think the biggest advantage of the dyno is being able to watch every vital on your engine while it's running for the first time. Also, when your done you know where your engine is making power and you can now match your impeller to your engine. I'm no expert though, only dyno'd once.

    For me, i'd rather be shakin in my boots in the dyno room for the first run, than in the boat

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  6. #4
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    Default Dyno

    $400.00 is cheep, in the Bay area in Northern Cali. cheep is a grand. Spend the money, you'll love it.
    Although the dyno is only a base line. It doesn’t operate in the real world. Unless the dyno is outside or close to it, running on ambient air.
    I agree, any confirmed information collected is priceless.
    Good luck
    Half the people in the world are below average.

  7. #5
    Senior Member Brendellajet's Avatar
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    For me the dyno was a great experience. With a fresh motor, I could get it to run and get the carb,timing& lash dialed in while in the boat, but after that I'd probably leave it alone and run it and probably leave a lot of power on the table. With my motors high compression & pump gas in the tank, I didn't want to take any chances. On the dyno you see where its making power, and how it responds to timing and jetting changes plus any other changes you have in store. Plus, I know that my motor is making good power with room to spare on pump gas=no worries!

    As for what would have been left on the table, on my motor probably 50 horsepower. I only say that because when I showed up to the dyno, builder and operator had already broken motor in, gone through lash, etc and were letting motor cool down. Quickly there after, some timing changes followed by a couple of tweaks to the carb and they were finding more power. Without the dyno its hard to quantify those changes unless you are willing to do lots of testing.

    Its worth the money.
    "He is a lover, not a fighter. But he's also a fighter, so dont get any ideas."

  8. #6
    Senior Member VDRIVERACING's Avatar
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    So true! It's pretty hard to "feel" a 50HP change at a "certain" rpm. So many variables during the operation in your boat. When we consider the cost of these HP motors, it's a must to protect your investment, AND to fully capatilize on that investment.

    You might find an oil leak too!

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