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Stock BP ..can it use Miata stock 9:1 pistons ??

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    #1

    Stock BP ..can it use Miata stock 9:1 pistons ??

    I know you all will rip on me and say to search the forum ....

    I have for awhile but I didnt find a quick solid answer. I bet there is a thread that discusses this exact topic , but didnt come across it .

    The question is can I use stock Miata 9:1 pistons w/ standard ring set with a stock BP block and stock BP head. ? nothing would be oversized . standard all around .

    I am just doing a stock rebuild of my BP. had the head resurfaced and a valve grind.

    If they do work together will I have an issues with using stock rods , wrist pins, ecu , fuel ,VAF etc.

    Will it add some horsepower ?

    What concerns do I have ? will I need to change anything else ? or will it not affect any thing other than giving a higher compression ...

    This is my first engine rebuild so its a learning curve for me .

    Or is this even worth doing as my stock pistons are alright and just need new rings. ?????

    Thanks abunch in advance
    Last edited by 323Permin; 01-27-2010, 05:10 AM.
    Tags: None
    #2
    Protege/escort/sephia BP=miata BP.

    Mazda B engine - Wikipedia
    http://en.wikipedia.org/wiki/Mazda_B_engine
    1993 Protege LX-Midnight's shadow SOLD
    1996 Honda CBR600-Wrecked. Damn Honda crippled me
    2002 mazda MPV-family truckster SOLD
    2010 VW routon

    Originally posted by jay
    .....they totally underestimated the number of gearheads such as myself that have families but refuse to grow the hell up and stop playing with cars, or that otherwise see the utility of having 4 doors. Obviously I ain't alone, as there are a helluva lotta sti and evo here. Bueler? Beuler? Mazda? Mazda?

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      #3
      you can run any BP piston setup you want anything from 8.2:1 to the 10.0:1 !
      -Jack

      ONTARIO MAZDA CLUB! Join! https://www.facebook.com/groups/500055016671733/

      91 626 LX - basically stock and pretty slow still
      http://www.clubprotege.com/forum/sho...my-GD-626-LX-)

      01 E53 3.0i - FOR SALE! pm if interested

      91 USDM Protege LX - SOLD! turbo/manifold up for sale!
      http://www.clubprotege.com/forum/showthread.php?t=46606

      Comment

        #4
        The BP out of the Escort GT and the 90-94 Protege SHOULD already have 9:1 pistons.
        -Dennis
        95 Nissan Pathfinder 4x4 - 191k miles

        I'll be back in the BG game eventually!

        Comment

          #5
          Originally posted by silverton View Post
          The BP out of the Escort GT and the 90-94 Protege SHOULD already have 9:1 pistons.
          No, they're 8.8:1, same as the 94-95 Miata. 96-97 Miata had 9:1 pistons.
          sigpic

          03 Accord DX: K24/5MT, peasant-spec old man's car
          92 240SX: KA/T25, nerd mobile

          Comment

            #6
            Information that I read is a LIE. I'm gonna go pout... haha.
            -Dennis
            95 Nissan Pathfinder 4x4 - 191k miles

            I'll be back in the BG game eventually!

            Comment

              #7
              there are some nice 9.5:1 miata pistons for sale in the FS section
              Posted By: Wheresthericego

              The BP crank is made out of invincible.
              sigpic

              Comment

                #8
                Which ones are 10 to one?
                My family has lots of bg's!
                2003 Ford Escort ZX2: Project car/future daily driver. Built Ford Tough (With Mazda Stuff)
                1999 Escort ZX2: Daily driver/beater. Going to be replaced by the '03 next summer.
                2000 Escort ZX2 S/R: bought wrecked, going to use as parts car
                1992 Protege LX: My old race car. Just a wrecked shell right now. Waiting for scrap to go up so that I can get rid of it.
                1992 Mazda 323: Race car
                1992 Escort Gt: My grandpa's old race car
                1994 Escort GT: My grandpa's new race car.
                Parts cars; 1993 Escort Gt, 1995 Escort lx

                Comment

                  #9
                  Originally posted by Racerboy View Post
                  Which ones are 10 to one?
                  Possibly 99+... for sure 2000+ until they switched to 2.0 ltr
                  '91 Mazda Protege GT/ Completely re-built engine w/.020 head shave, intake/exhaust P&P & 3 angle valve job, 2.25 full custom exhaust, RX-7 AFM, K&N Cone, 18* Timing advance, exhintake cam mod w/Fly'n Miata adjustables, Custom short shifter, CenterForce clutch, lightened flywheel, HAWK pads on all 4, Motegi Racing 8 spoke 16"s w/205/45/ZR16 rubber, VentShade window visors, lower lip spoiler, 4" driving lights w/halo's. MX-3 center console & Black carpet swap w/2 layers dynomat type insulation.
                  Soon to come... Garret T25 turbo, DSM injectors, GTX ecu (Needed) SAFC (Needed) FMIC (Needed)

                  '91 Toyota Soarer GT-TL/ Stock 1JZ-GTE, K&N drop in filter, Gewalt Evolution deep dish 17"s, Nardi steering wheel

                  sigpic

                  Do not be conformed to this world, but be transformed by the renewing of your mind!

                  Comment

                    #10
                    99-00 are 9.5:1, 01-05 (non-Mazdaspeed) are 10:1
                    sigpic

                    03 Accord DX: K24/5MT, peasant-spec old man's car
                    92 240SX: KA/T25, nerd mobile

                    Comment

                      #11
                      BP's have different deck hight between the different years so 01+ pistons might have more or lest compression in a bp05 block
                      GRIPtoLIVE........................................ .........
                      NA6C new track slut-NB8C waiting on parts
                      94 E36- RB20 swap -sold
                      93 323 budget track slut RIP
                      FEARLESS MOTORING..........................................

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