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R-4 CARBS

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  • R-4 CARBS

    the carbs are carter right? whats the cfm rating of the carbs? did any r-4s run at bonnieville?and since the record runs were in 1962 were the larks and hawks 1962 or 1963 models? if i remember right there was a 6-cylinder in the mix also?

  • #2
    They ran in 63 and 64 and there was a 64 Convert with R-4 engine it went 139.49 mph two-way flying-mile average and driven by Andy Granatelli full write up in Jan. 1964 hot rod magazine called Bonneville Wrap Up also a picture of Paula Murphy with old #9 she became the worlds fastest woman on wheels with a 2 way average of 161.29 mph...quick trivia question who was the other lady driver for Andy on the salt, she set 26 records on the salt??/

    Bob Peterson / C & B Studebakers

    Castro Valley, CA

    Candbstudebakers
    Castro Valley,
    California


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    • #3
      R4 Hawk also ran in 64.

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      • #4
        I was not aware there were any R4 Hawks made??

        Dan White
        64 R1 GT
        64 R2 GT
        Dan White
        64 R1 GT
        64 R2 GT
        58 C Cab
        57 Broadmoor (Marvin)

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        • #5
          What the factory build orders sent out the door had absolutely nothing to do with what the Granatellis were running at Bonneville. Their engines were hand-built and not exactly stock. Well-known fact, the fastest of them all was the hot rod 299" used to develop some of the ideas which became the "production" R3s.

          thnx, jack vines

          PackardV8
          PackardV8

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          • #6
            Yes, they were Carter AFB's, 3810S for the front and 3811S for the rear. Based on venturi dia. and throttle bore size, the carbs are rated at 575cfm. Each. I've never been able to find any official Carter flow data for the Stude AFB's (or most any others for that matter). It's not even listed on the blueprints even.
            The Bonneville runs with the '64's were done in Sept.'63 and there were 12 cars there including 2 Champ 6 powered ones..
            There was only 1 R4 car built on the assy. line and it was the Daytona HT built for Car Life Magazine and featured in the article that was mentioned here recently. The R3 and R4 powered cars at the record runs were not built that way on the assy. line.

            R2Andy
            R2Andrea

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            • #7
              Back in January of 1964 Hot Rod Magazine also did an article called "STUDE LARK WITH R-3 PERFORMANCE" 7 pages and very good and nice to go back and read about these cars again...Bob

              Bob Peterson / C & B Studebakers

              Castro Valley, CA

              Candbstudebakers
              Castro Valley,
              California


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              • #8
                quote:Originally posted by R3 challenger

                The Studebaker National Museum has the original 6-cylinder engines used at the 1963 Bonneville runs. It's not known what happened to the cars. The engines were installed in the first two six-cylinder 1964 cars made for regular production, 64S-1001 and 64S-1002. Both cars were Bordeaux Red '64 2-door sedans. Interestingly, both had flanged rear axles. 64S-1001 had a straight 3-speed and 3.31 axle ratio while 64S-1002 was built with overdrive and a 4.56 ratio. Both cars had disc brakes with HD springs & shocks but no radio or undercoating.

                The differences in axle ratio/transmission were probably to allow experimentation for best top speed. The 4.56/OD combination would give an overall ratio of 3.192 while the other car had a straight 3.31. It sure would be interesting to know exactly what was done inside the engines....they did get a top speed of just over 100 mph at Bonneville. Pretty good for the 170 OHV six, considering wheel slippage on the salt, the boxy front end of 1964 Lark-types, and an elevation of over 4,000'.

                Anyone care to build a clone of these cars?

                George

                george krem
                george krem
                george krem

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                • #9
                  quote:Originally posted by R3 challenger

                  The Studebaker National Museum has the original 6-cylinder engines used at the 1963 Bonneville runs. It's not known what happened to the cars. The engines were installed in the first two six-cylinder 1964 cars made for regular production, 64S-1001 and 64S-1002. Both cars were Bordeaux Red '64 2-door sedans. Interestingly, both had flanged rear axles. 64S-1001 had a straight 3-speed and 3.31 axle ratio while 64S-1002 was built with overdrive and a 4.56 ratio. Both cars had disc brakes with HD springs & shocks but no radio or undercoating.

                  The differences in axle ratio/transmission were probably to allow experimentation for best top speed. The 4.56/OD combination would give an overall ratio of 3.192 while the other car had a straight 3.31. It sure would be interesting to know exactly what was done inside the engines....they did get a top speed of just over 100 mph at Bonneville. Pretty good for the 170 OHV six, considering wheel slippage on the salt, the boxy front end of 1964 Lark-types, and an elevation of over 4,000'.

                  Anyone care to build a clone of these cars?

                  George
                  And everyone thought my story about the Jet Thrust Six engines was all made up...



                  [)]

                  Matthew Burnette
                  Hazlehurst, GA

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                  • #10
                    what was the cfm rating on the 259's 4 bqrrels and the 289's 4-barrel? how about R-1'S,R-2'S R-3'S? at 304.5 cubic inches the R-4 seems over carb'd with 1150 total cfm.it would have ran better with less cfm around 800-900 cfm even with a wilder cam.

                    with a supercharger or turbo the larger cfm would work for race only,or street/strip.

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                    • #11
                      It doesn't appear that Carter released carb flow ratings for the vast majority of OE AFB's.The notes I have regarding flow are based on venturi dia. and throttle bore dia. and only cover 4 or 5 different combinations. Although they are supposed to be accurate I'm unaware as to their original source. And yes, if the 575 cfm rating is correct, the R4 is over carbed. By the same sheet, the R2 carbs (3507S, 3588S and 3725S) are rated at 625 cfm. Unless there is a mistake on the blueprint the R3 (3808S) carb has a smaller primary venturi than the R2's and R4's. and isn't accounted for in the info I have. I've never gotten around to looking up the 259/289 (same carb for both) and R1 carbs.

                      R2Andy
                      R2Andrea

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