Announcement

Collapse
No announcement yet.

Boring out a B-3 engine and final drive for G trans

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Boring out a B-3 engine and final drive for G trans

    Has anyone ever done or know if it is safe to bore out B-3 cylinders to either +030" or +040"?

    Has anyone ever install the Mazda Speed 4.88 ring and pinion gear set in a G transmission?

    Thanks

  • #2
    Why not get a 1.6?

    Comment


    • #3
      The rules for the Festiva drag racing challenge says it has to be a B-3 block, but just about anything else is OK. B-3 blocks I have but they need a little machine shop work to get them in really good condition.

      Afterward I can go to a 1.6 B-6 or the BP.

      Comment


      • #4
        Aaaaaahhhhhhhhh.......

        Comment


        • #5
          I think you can find +.030 pistons, but I don't know of anyone that has done it... of course you can hunt around to find pistons from another application that may work at even larger sizes, but I don't think the cylinders can take much more than that.
          ~Nate

          the keeper of a wonderful lil car, Skeeter.

          Current cars:
          91L "Skeeter" 170k, Aspire brakes, G15, BP, Advancedynamics coil overs, etc. My first love.
          1990 Kawasaki Ninja 250 - my gas saver, 60+mpg - 40k
          2004 MotoGuzzi Breva - my "longer range" bike - 17k

          FOTY 2008 winner!

          Comment


          • #6
            I just checked RockAuto and it looks like they aren't selling the oversized pistons anymore for some reason. From my knowledge, the B6 block is basically just a bored out B3 block so there should be plenty of room to go .040 over.

            Dickmeyere was making Billet pistons at one point with a lot of suggested gains but they were $800 a set....
            "The White Turd" 1993 Festiva 144k miles. (Winner of FOTM November 2016)
            sigpic
            "The Rusty Banana" 1990 Yellow 5 Speed Mud Festiva (Lifted with 27" BKT Tractor Tires)(Winner of "Best Beater Award" - Madness 12 - 201

            "Papa Smurf" 1992 Blue 5 Speed Shell
            "Cracker?" (name pending) 1992 White Auto Shell (Future BP Swap)
            "Green Car..." Scrap Car that Runs?!?
            "Red Car..." Complete Scrap Car

            "El Flama Blanca" 1993 Festiva 104k miles. (Lil Brothers Car)
            https://drive.google.com/file/d/0BzM...ew?usp=sharing

            Comment


            • #7
              No, I know you can't bore the block up to B6 size. While externally they are the "same" block the cylinders are different and there isn't enough wall thickness.
              ~Nate

              the keeper of a wonderful lil car, Skeeter.

              Current cars:
              91L "Skeeter" 170k, Aspire brakes, G15, BP, Advancedynamics coil overs, etc. My first love.
              1990 Kawasaki Ninja 250 - my gas saver, 60+mpg - 40k
              2004 MotoGuzzi Breva - my "longer range" bike - 17k

              FOTY 2008 winner!

              Comment


              • #8
                OK, ever heard how thick the walls are or if anyone has gone +.040? I may just go +.030 to be safe, but +.040 pistons are available.

                Comment


                • #9
                  I haven't... but now I'm kind of curious and I think i have a junk block at home. Maybe I'll cut it up tomorrow and let you know.
                  ~Nate

                  the keeper of a wonderful lil car, Skeeter.

                  Current cars:
                  91L "Skeeter" 170k, Aspire brakes, G15, BP, Advancedynamics coil overs, etc. My first love.
                  1990 Kawasaki Ninja 250 - my gas saver, 60+mpg - 40k
                  2004 MotoGuzzi Breva - my "longer range" bike - 17k

                  FOTY 2008 winner!

                  Comment


                  • #10
                    Mic'd a b3 bore - the wall thickness is ~0.235"
                    I should have mic'd the B6t block sitting next to it... maybe tomorrow.
                    ~Nate

                    the keeper of a wonderful lil car, Skeeter.

                    Current cars:
                    91L "Skeeter" 170k, Aspire brakes, G15, BP, Advancedynamics coil overs, etc. My first love.
                    1990 Kawasaki Ninja 250 - my gas saver, 60+mpg - 40k
                    2004 MotoGuzzi Breva - my "longer range" bike - 17k

                    FOTY 2008 winner!

                    Comment

                    Working...
                    X