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whats the difference in the "R" engines

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  • whats the difference in the "R" engines

    Maybe I'm just a little slow or uninformed but I was wondering what the difference is between the R1, R2, R3, and the regular engines is. Are they just built for higher performance or is it something else. Just curious.

  • #2
    They are all high performance engines, just different degrees & rareity. The R-1 was the base Avanti engine that featured a more radical cam, 4 bbl carb, dual point distributor, heavy duty aluminum cam gear, dual exhaust, & a 10.25:1 compression ratio. The R-2 was basically the same except for a 9:1 compression ratio & a supercharger. the R-3 had a more radical cam, a higher output supercharger, cubic inches was increased to 304.5, carburator was enclosed in a pressure box & the engine was hand built in Santa Monica, California by Paxton Products & had to develop at least 335hp on the dyno before it was released. There was also an R-4 that was like the R-3, but it was naturally aspirated with dual 4 bbl carburators, also hand built by Paxton.

    60 Lark convertible
    61 Champ
    62 Daytona convertible
    63 G.T. R-2,4 speed
    63 Avanti (2)
    66 Daytona Sport Sedan
    59 Lark wagon, now V-8, H.D. auto!
    60 Lark convertible V-8 auto
    61 Champ 1/2 ton 4 speed
    62 Champ 3/4 ton 5 speed o/drive
    62 Champ 3/4 ton auto
    62 Daytona convertible V-8 4 speed & 62 Cruiser, auto.
    63 G.T. Hawk R-2,4 speed
    63 Avanti (2) R-1 auto
    64 Zip Van
    66 Daytona Sport Sedan(327)V-8 4 speed
    66 Cruiser V-8 auto

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    • #3
      thanks for the information. Did they all use the same block or was there a different block for the R3?

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      • #4
        My understanding the R3 and R4 blocks were essentially the same blocks but hand selected castings for thickness, strength and lack of core shift. They were specially machined and the heads were also special castings.

        Just overboring a stock 289 doesn't make an R3 or R4.



        Poet...Mystic...Soldier of Fortune. As always...self-absorbed, adversarial, cocky and in general a malcontent.
        Poet...Mystic...Soldier of Fortune. As always...self-absorbed, adversarial, cocky and in general a malcontent.

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        • #5
          I know you didn't ask about it, but there was one experimental R5. It was essentially the same as the R4, but had dual superchargers along with the dual 4 barrels.

          Dylan
          '61 lark deluxe 4dr wagon
          Dylan Wills
          Everett, Wa.


          1961 Lark 4 door wagon
          1961 Lark 4 door wagon #2 (Wife's car!)
          1955 VW Beetle (Went to the dark side)
          1914 Ford Model T

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          • #6
            thats interesting with the R5, do you know anymore about it, like what it was in or how well it worked?

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            • #7
              So, if I put a supercharger on my low compression 289 and add an extra distributor, should I call it an R2D2?

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              • #8
                The R-5 was experimental whereas the other R series engines were available to the public. The R-5 also had an aircraft fuel injection setup made by Bendix installed. The Avanti it was in did a 2 way average of around 196 mph if memory is correct. It was built by Paxton, Andy Granatelli oversaw the construction.

                60 Lark convertible
                61 Champ
                62 Daytona convertible
                63 G.T. R-2,4 speed
                63 Avanti (2)
                66 Daytona Sport Sedan
                59 Lark wagon, now V-8, H.D. auto!
                60 Lark convertible V-8 auto
                61 Champ 1/2 ton 4 speed
                62 Champ 3/4 ton 5 speed o/drive
                62 Champ 3/4 ton auto
                62 Daytona convertible V-8 4 speed & 62 Cruiser, auto.
                63 G.T. Hawk R-2,4 speed
                63 Avanti (2) R-1 auto
                64 Zip Van
                66 Daytona Sport Sedan(327)V-8 4 speed
                66 Cruiser V-8 auto

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                • #9
                  try the search function. it will give you weeks of reading.

                  thnx, jack vines

                  PackardV8
                  PackardV8

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                  • #10
                    Limited R5 information, but accurate: Page 67 of February 2009 Collectible Automobile. BP
                    We've got to quit saying, "How stupid can you be?" Too many people are taking it as a challenge.

                    Ayn Rand:
                    "You can avoid reality, but you cannot avoid the consequences of avoiding reality."

                    G. K. Chesterton: This triangle of truisms, of father, mother, and child, cannot be destroyed; it can only destroy those civilizations which disregard it.

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                    • #11
                      jack Vines some one here in the San Francisco area told me you were looking for a 53-54 "c" body car if so I have one for sale either e-mail me at candbstudebakers@sbcglobal.net or call 510-266-2522......Bob
                      Candbstudebakers
                      Castro Valley,
                      California


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