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1957 Golden Hawk R2 modification. What carb do I run?

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  • #16
    If you have the original WW carb it should be jetted already for boost enrichment. So double check that first. Then source some bigger jet numbers and rejet based on A/F readings under a chassis dyno load. As for the 2 barrel tall intake have the plenum and port entrance runners ported and opened up some. The exhaust crossover cavity surrounds the upper plenum so keep that in mind.

    A good 30 + years ago I raced a Hawk with the GH 57 Blower carb combo. Moved it gradually into the low 13's and a best of 12.98 with the VS blower and 2 barrel. Heads were set up just like yours (early DD mods) and R cam, 3.54 posi. The blower though was modified for fix ratio by removing the variable ratio inner spring and locking the slider pulley to a near minimum diameter. Fuel pump was carter boost reference R2 design. That's my limited experience with blown 2 barrel WW induction.

    Good luck and hope this helps.
    Start and Stage Your Studebakers

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    • #17
      Originally posted by Lavender_L57 View Post
      Ok. Got out the spec sheet for the cam, I was a little off. P/N CS6R21 110 F/T. ADV. DUR. 282 INT AND EXHAUST, 222@050, .447 LIFT INT AND EXHAUST, 110 LOBE CENTER, CENTER LINE 104. It's a R2 regrind from Fairborn.
      Something seems still odd there. Sixty degrees difference between the .050" and the advertised duration is quite a bit more than usual. For example, a CompCams 282 advertised duration solid lifter cam is 236 @ .050", or 46 degrees difference. The factory R1/R2 is 260 advertised and 223.6 @ .050", or 36.4 degrees difference.

      jack vines
      PackardV8

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      • #18
        https://photos.app.goo.gl/mvmJanqck2AYkZgP7

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        • #19
          Not sure if my photo got attached. Double checked and the numbers are correct. Fairborn lists this cam as R2+

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          • #20
            Originally posted by Lavender_L57 View Post
            Not sure if my photo got attached. Double checked and the numbers are correct. Fairborn lists this cam as R2+
            Yes, I can see the cam card; FWIW, when I run those specs on my DynoSim, it says 222 intake, 229 exhaust, which would be the dual pattern you mentioned earlier.

            jack vines
            PackardV8

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            • #21
              Thanks everyone for your input. I'm currently working on gathering my engine parts together for reassembly. I will consider the SC upgrades mentioned above, sounds interesting. If I could find vintage 4b intake carb and hat ,that would satify me. I think I saw an Offenhouser set up on eBay a while back. I'll start looking again. Cheers!

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              • #22
                Originally posted by Lavender_L57 View Post
                Thanks everyone for your input. I'm currently working on gathering my engine parts together for reassembly. I will consider the SC upgrades mentioned above, sounds interesting. If I could find vintage 4b intake carb and hat ,that would satify me. I think I saw an Offenhouser set up on eBay a while back. I'll start looking again. Cheers!
                Investigate carefully before paying bucks for one of those vintage intake manifolds. Many were sized for the '51-54 232" head ports and will actually choke the '55 and up heads.

                jack vines
                PackardV8

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                • #23
                  Nice! Excellent advise. I didn't think of that. I'll be sure to verify this before I spend that money!

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