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Thread: Going to the Dyno shop

  1. #1
    President Member PeterHawk's Avatar
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    Going to the Dyno shop

    The engine rebuild process is just about complete on the 289 in my '62 GT Hawk. It was rebuilt keeping it stock with .030" over on the cylinders, WCFB and Petronix in a Delco distributor. It is my understanding when on the dyno the generator or power steering pump will not be installed. The factory exhaust manifold will be installed. What type of torque and horsepower numbers could I expect - let the guessing begin!

    By the way, the whole rebuild adventure can be viewed on YouTube - Pete's Garage (Engine rebuilding).

    Peter Bishop
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    Northeast Zone

  2. #2
    Silver Hawk Member JoeHall's Avatar
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    I am afraid to guess, but will be VERY interested in what the actual numbers turn out to be!

  3. #3
    Silver Hawk Member bezhawk's Avatar
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    Hopefully the 225 advertised hp.
    Bez Auto Alchemy
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  4. #4
    President Member PeterHawk's Avatar
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    I guess it depends on how Studebaker arrived at the 225. With a 3:31 rear end, am I more interested in the torque number?

    Peter Bishop
    Director,
    Northeast Zone

  5. #5
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    Rear wheel dyno? Auto or stick? I would say about 160 HP.

  6. #6
    President Member PeterHawk's Avatar
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    Engine will be out of the car and run on a dyno stand.

    Peter Bishop
    Director,
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  7. #7
    Speedster Member
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    How much work is the guy running the dyno willing to do? Carb jetting and timing or are you just put the motor on and run it?

  8. #8
    President Member PeterHawk's Avatar
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    I will let you know!

    Peter Bishop
    Director,
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  9. #9
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    Peter -

    Most defiantly...spend the extra few minutes optimizing the engine. You are at the place to do this. The jetting and ignition timing, verify the valve adjustment after the first or second pull.
    It'll take minutes now, hours on the road to optimize everything.

    Mike

  10. #10
    Silver Hawk Member
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    One thing to keep in mind; carb jetting which makes most power on the dyno won't necessarily be the best on the road when running an air filter breathing hot underhood air and exhausting through mufflers.

    jack vines
    PackardV8

  11. #11
    Golden Hawk Member StudeRich's Avatar
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    A VERY good point Jack, these Engine Stand Dyno tests are not anywhere near to real world H.P. and Torque as Running the CAR on a Dyno at the Rear Wheels or the H.P. you actually GET on the Interstate.

    It will give us a good idea of how close it comes to Studebaker's 225 "Advertised" H.P. and 305 Ft. Lbs. rating though.

    I am going with 230 H.P. and 310 Ft. Lbs. ! Are you going to run it with 92 Octane Premium, no E-10 Unleaded?
    Last edited by StudeRich; 03-05-2017 at 05:26 PM.
    StudeRich
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  12. #12
    President Member PeterHawk's Avatar
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    Hopefully a video will follow soon. The gasoline question is a great point. Once the car is on the road, maybe I will take it for another Dyno - a rolling Dyno. We can compare the readings.

    Peter Bishop
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    Northeast Zone

  13. #13
    Silver Hawk Member bezhawk's Avatar
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    Why would you run premium fuel ? It won't make any more power. It certainly shouldn't ping or detonate with stock compression with regular fuel. You might even LOOSE torque, and HP by the slower burning fuel. The only Studebakers that NEED premium are the Avanti engined ones, or 56J Packard and the 57-8 Golden Hawks.
    Bez Auto Alchemy
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  14. #14
    President Member PeterHawk's Avatar
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    First run was aborted, needs carb tuning!

    Peter Bishop
    Director,
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  15. #15
    Silver Hawk Member
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    Quote Originally Posted by PeterHawk View Post
    First run was aborted, needs carb tuning!
    What was the carb doing/not doing?

    jack vines
    PackardV8

  16. #16
    President Member PeterHawk's Avatar
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    Running lean, secondaries too small

    Peter Bishop
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  17. #17
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    I'm guessing 230 HP.

    Quote Originally Posted by PeterHawk View Post
    Engine will be out of the car and run on a dyno stand.
    Joseph R. Zeiger

  18. #18
    President Member Xcalibur's Avatar
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    I have never seen anyone leave their very first dyno session pleasantly surprised... but, it could happen, I suppose.

  19. #19
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    Quote Originally Posted by PeterHawk View Post
    What type of torque and horsepower numbers could I expect - let the guessing begin!

    .
    203 HP, 290 Ft Lb

  20. #20
    President Member
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    would you expect an engine that's not broken in to put out optimum power?

    64 GT Hawk (K7)
    1970 Avanti (R3)

  21. #21
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    I would think the pump blend of 10% ethinal would be a detriment to hp numbers that were originally figured with pure gasoline?

  22. #22
    President Member t walgamuth's Avatar
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    190/280............
    Diesel loving, autocrossing, Coupe express loving, Grandpa Architect.

  23. #23
    President Member 345 DeSoto's Avatar
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    I sure would LIKE to see that 280 torque number! Had MY 289 completely machined/rebuilt last Spring. In addition to the flat tops and Pertronix, it has stiffer valve springs and an Edelbrock 1403. Don't care about the HP, but I'd be REALLY happy with that torque number...

  24. #24
    Speedster Member
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    I would bet the advertised HP was at sea level and 70degrees and no Fan seems like SAE horsepower was at 500 ft alt and I do not remember temp std.
    Hawkowner.

  25. #25
    Silver Hawk Member
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    Quote Originally Posted by 64V-K7 View Post
    would you expect an engine that's not broken in to put out optimum power?
    Yes, if properly machined and the cam is given a 20-minute run in. Today's cylinder wall finishes seat in almost upon startup.

    No, if chrome rings were used.

    Maybe, I'd change the oil after the cam break in and before the dyno session.

    jack vines
    PackardV8

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