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    GTX engine internal options

    Hey boys/gals, been a little while since I've posted here.

    I've run into some problems with my 88 GTX, it seems to be down to running on 2 cyl now

    I haven't had any time yet to pull it apart to find out exactly what has happened but I'm going to expect the worst. I think #1 and #3 pistons have holes in them.

    So what are my options? Swap in a stock Miata block and drop the GTX head on it? Spend a retarded amount of money and build what I have with all new forged parts? Would anyone have a some stock internals they'd like to sell?

    I guess with 300,000kms and running 15psi has taken its toll....I'm just hoping the head isn't mangled.
    Cars Suck...

    #2
    ok, if you did happen to blow holes in 2 pistons thats not good, to rebuild it is gonna be alot of work, expect to need the block bored and head machined and resurfaced. that is if little pieces of melted piston didnt damage it to badly.

    1) find a 1.6 miata engine. modify the therostat housing and put it in your car with the stock gtx intake and turbo = cheap
    2) rebuild your entire engine (refer above)= $$$
    3) Swap in a BP, expact standalone managment, more gauges, new transmission, wiring
    4) find a mercury capri xr2/maz 323gt or another GTX in a JY and take its engine for direct swap(expect high milage or work if its been sitting)

    my favorite option:
    5)there is a B6T engine on ebay right now for $625 + $275 shipping = $900 and you have another engine delivered to your house by the time you have your engine out. take your engine apart sell turbo setup for $200, B6T con. rods for $150 and intake manifold for $50. take block to scrapyard cause alum is 55cents per lb, give them that for the beer money required for the swap and now it only costs $500 to have the engine delivered to u. it will have result in the shortest downtime, overall cost, be the easiest, and most reliable since it is completly stock.
    "See that car, in the 80's that car was deadly." Random man to his son while passing the GTX in a parking lot

    Originally posted by neuspeedescort
    the proper spelling would be "Launchabilitiness" i do believe.
    -88' Mazda 323 GTX, 1.8t, Modified Magazine May 2012
    -88' Mazda 323 GTX, caged and ready for dirt
    -93' Mazda Miata, half caged
    -09' Mercedes C63 AMG
    -87' Toyota Land Cruiser, 33's with slight lift, safari style!

    Comment


      #3
      B6T blocks arent aluminum. They are cast iron if I recall. The head is aluminum, but from what i remember about my block was that it was definately not aluminum.
      Mazda
      1988 Black 323 GT
      DOHC 16 VALVE TURBO

      2013 Velocity Red Mica Mazdaspeed3

      Comment


        #4
        so i guess that means less beer money
        91 protege gt. dropzone mx3 springs, mx3 crossmember, ractive front and rear strut braces, rear lower mx3 brace, 4 wheel disc brakes, corksport ss brake and clutch lines,kvr front pads, ractive cai,ram air hood scoop, modified front bumper, shaved ant and rear trunk lock, fubu ant, short shifter, corksport bronzeoil shifter bushings,92 glass sunroof and tail lights, mx3 center console, autometer gauges (volt and oil pressure) cluster needles painted to match, sound system, 17 inch eagle alloy 193 with 205 40 17 rubber. klze is ALIVE BABY!! . http://www.cardomain.com/ride/2394656http://www.toprotege.com/forums/show...hlight=project[url]

        Comment


          #5
          Cool, thanks for the info trailrider.

          I'm going to drop out the engine and trans this afternoon and hopefully find out what happened. I found out a buddy of mine has a built Miata motor sitting in his garage....so I may end up taking it on him lol.

          I'll post pics of the teardown.
          Cars Suck...

          Comment


            #6
            Originally posted by trailrider098 View Post
            3) Swap in a BP, expact standalone managment, more gauges, new transmission, wiring
            Curious as to what you mean by all this.

            Why should he expect standalone engine management when a bp26 ecu works excellent? Or you can use the stock computer and distributer to run the 1.8.

            More gauges? Why? due to the standalone and necessity to tune? Not needed if you use the b6t ecu and dizzy.

            New transmission? Not necessary but it sure does make a great upgrade to go with the BPT trans. But this means axles and shifter cables and shifter.

            Wiring- Some is necessary, but you can run a BP motor with a b6t distributer and b6t ecu without a hitch. Or if you want to go the most complete route you'll need a bp26 ecu and a bpt engine harness. Use the b6t chassis harness and run a few wires from the bpt engine to the connectors. It's not that bad.

            Now the real problem is motor mounts need to be fabbed. This is about the only thing that takes more advanced tools.

            Comment


              #7
              sorry about that #3 , it was late and I was to lazy to type out how to keep the stock ecu. Yes you can use a bp26 or the stock ecu, with no gauges. However in my opinion if you are useing a 1.8l engine with a 1.6 loom, and ecu then I would just feel better/ safer monitering it with gauges like oil pressure and a/f ratio. Also it's easy enough to blow up the 1.6awd tranny, y not upgrade to the proper trans while swaping engines? Cause the 1.6 trans on the 1.8 will only half bolt up anyways.
              "See that car, in the 80's that car was deadly." Random man to his son while passing the GTX in a parking lot

              Originally posted by neuspeedescort
              the proper spelling would be "Launchabilitiness" i do believe.
              -88' Mazda 323 GTX, 1.8t, Modified Magazine May 2012
              -88' Mazda 323 GTX, caged and ready for dirt
              -93' Mazda Miata, half caged
              -09' Mercedes C63 AMG
              -87' Toyota Land Cruiser, 33's with slight lift, safari style!

              Comment


                #8
                Originally posted by trailrider098 View Post
                Cause the 1.6 trans on the 1.8 will only half bolt up anyways.
                No kidding? I've never messed around with bolting a 1.8 to the stock awd trans. Different bolt pattern on the block or what?

                Also it's easy enough to blow up the 1.6awd tranny, y not upgrade to the proper trans while swaping engines?
                .

                ^Totally agree with you there. ^

                Back on the thread. If your buddy has a 1.6 laying around that seems like the quickest/best bet to get you back on the road. Only thing I'd want to know for sure is the CR ratio? Most times built miata motor means HIGH compression.

                Otherwise buy a front clip from a JDM GTX or better yet a GTR and swap it all over. You'll get motor/trans/mounts/shifter cables/shifter/ecu/wiring shoot damn near everything you'll need for a proper swap except a LSD rear end.

                Comment


                  #9
                  [QUOTE=pikespeakgtx;494142]No kidding? I've never messed around with bolting a 1.8 to the stock awd trans. Different bolt pattern on the block or what?

                  ya, the engine part bolts up fine but none of the bolts that go through the oil pan to the tranny line up.
                  "See that car, in the 80's that car was deadly." Random man to his son while passing the GTX in a parking lot

                  Originally posted by neuspeedescort
                  the proper spelling would be "Launchabilitiness" i do believe.
                  -88' Mazda 323 GTX, 1.8t, Modified Magazine May 2012
                  -88' Mazda 323 GTX, caged and ready for dirt
                  -93' Mazda Miata, half caged
                  -09' Mercedes C63 AMG
                  -87' Toyota Land Cruiser, 33's with slight lift, safari style!

                  Comment


                    #10
                    Ok so it turns out my buddy's built Miata engine is actually a blown B6T lol.

                    So I think I'm going to actually spend some money and build it right.

                    BTW, got it all apart and #1 piston had a chunk of the ring land blown clear off and also burnt an exhaust valve damn near in half. Yay!
                    Cars Suck...

                    Comment


                      #11
                      A blown-up b6t won't help you much.

                      What are you gonna do? Buy pistons and bore and hone the cylinders? , check all the rods and crank journals and buy new bearings? Assemble it yourself or pay someone?

                      Then what about the head? Just fix what's broken or get used head, or port and polish 16 new stainless valves, new valve seats and a 3/5 angle grind?

                      Whatever you chose, have fun with that rebuild.

                      Comment


                        #12
                        Yeah, I've found some custom made JE pistons that require a 0.010" overbore. Should be just enough to clean up the cylinder walls, the blown one is just lightly scratched up.
                        Probably going to put all new bearings in it as well. The head I'm going to use as a spare since I have a freshly rebuilt head from a rally car.
                        Cars Suck...

                        Comment


                          #13
                          I gotta say, i'm looking forward to reading about the finished product!
                          M
                          '88 323 DX ,Bone Stock
                          '88 323 GTX, CAI, giant fmic, 3" exaust from the turbo back

                          Comment


                            #14
                            hah... you're buying the JE pistons? Those are super nice. I still can't figure out why that guy (early and his name is escaping me) never used them...

                            1988 White GTX - #1 parts
                            1988 Black GTX - #2 reliably broken touge monstar (294,000 miles no rebuilds) - dead
                            1988 Blue GTX - #3 in progress (view here)
                            1988 Blue GTX - #4 BPT swapped weekend warrior.
                            1988 White GTX - #5 Rally car

                            Comment


                              #15
                              His name on the GTX forum is joekillspeople, I think he bought a fully built motor so he has no use for them. He said he's had them for years now.
                              Cars Suck...

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