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    Motor.

    Some people wanted the specs. I posted it on E3S but since we have different members here....here goes.

    The engine build, performed by Pete McHenry - (one of the top BMW engine builders in the country and builder of dozens of BMW CCA Club Race WINNING engines - also BMW CCA Tech Advisor) was completed in October of 2003.

    Engine will be broken in with an Autothority chip, and Bosch 17# injectors, as well as conventional oil. At 1000 miles, engine will receive Bosch 21.5# injectors and custom chip. Eventually, after dyno tuning, it will receive custom software to optimize fuel/air curves, and provide a 7500 rev limit.

    Specs are as follows:

    -86mm bore, with honed walls
    -86.6mm 3.0L nitride-hardened forged crankshaft (checked on micrometer)
    -11:1 compression
    -M3 135mm factory rods
    -Balance and blueprint
    -3.0 M3 camshafts
    -Conical M3 valvetrain
    -S52 valve retainers
    -33mm LTW tappets
    -Full race headjob with heavy porting, valve reshaping, guide shaping, relief grinding, and 5-angle race valve job.
    -head shaved .0012”
    -OBDI wiring/413 ECU
    -OBDI intake manifold
    -Authority 3.0L chip
    -big-bore knife edged throttle body
    -21.5# Bosch injectors
    -3.5" Euro MAF sensor
    -K&N cone filter (w/ heat shield)
    -Aluminum thermostat housing
    -Late-model metal water pump impeller
    -Low temp thermostat
    -fan delete
    -3.2L stainless headers
    -custom down pipe, custom center section to a 2-1, 2.5" Straight-pipe with resonator and Dynomax muffler (no cat)
    -Getrag 260 transmission
    -Motorsport 228mm clutch
    -Aasco 7.5lb. Aluminum flywheel
    -custom fabricated 323i transmission brace
    -E30 M3/M10 (engine) transmission mounts
    -modified selector rod
    -custom shifter, using Z3 lever and all new hardware.
    -E30 325 driveshaft
    -3.73LS rear end

    -Engine was assembled using OEM bearings, gaskets, and any other ancillary components. Rods were balanced within +- 1.5 grams --- factory tolerance is +-5 grams. Pistons were balanced to within +- 1 gram --- factory tolerance is +-3. Loctite Anaerobic sealer used throughout.

    #2
    Thanks for the specs. Sounds like it will be a blast to drive.

    Comment


      #3
      OUt of couriousity - what would your dad charger for a motor like this ready to install?

      OH - and also - could you describe the motor building process?

      Is it bacically an M52(aluminium block) that you added various s50 M3 parts to?

      george
      Originally posted by Matt-B
      hey does anyone know anyone who gets upset and makes electronics?

      Comment


        #4
        sweet, l want to see this beast! :D I really want to do the conversion in my ic.

        e-mail me if you wouldn't mind letting someone oogle over it one day!
        '87 325ic, powered by S50.

        Comment


          #5
          impressive stu... sounds incredable
          e30sport.net
          '86 325es - s54b32tu - 6-speed - Mtech 1
          '89 325is - m20b25 - 5-speed - Individual​
          '06 M3 Competition - 6-speed
          '19 Porsche GT3 RS - 7-speed PDK
          '94 Lancia Delta HF Integrale EvoII - Giallo Ginestra
          '97 Range Rover Vitesse

          Comment


            #6
            The block is a bored out 325 block. M50/M52...doesn't matter. Same casting. Stu mentioned this on the old e3s when he got the parts originally.

            -Prince
            Randall Prince
            http://www.rp1.us/ Used Cars

            Comment


              #7
              I thought you were gonna do 3" exhaust Stu?
              James Peacock

              WWFSMD?

              Comment


                #8
                Dyno that motor yet? 8)

                and i thought you mentioned a 4.10 rear end.......do you really need it??

                Comment


                  #9
                  .............wow

                  well i know what im asking for, for christmas.
                  98 M3/4/5

                  Comment


                    #10
                    Sounds like a nice little setup you got there :up:

                    My only question is why the use of the stock 3.0 cams instead of some higher duration cams, or is it just a money thing?

                    '05 E46 M3 Imolarot/Cinnamon - CURRENT
                    '98 E36 M3 Estorilblau/Dove - SOLD
                    '90 E30 M3 Brilliantrot/Black - SOLD
                    SRS BSNS Motorsports - 24hrs of LeMons Racer

                    Comment


                      #11
                      I'm sure stu can correct me, but the in a street car the stock M3 cams offer a good combination of low end, midrange, and top end. all over power and torque kicks ass
                      BEERTECH

                      Comment


                        #12
                        stu do u drive your car daily?...im thinking of doing a m50 swap and i would like to continue driving my e30 daily.....thank you and how much power are you putting down??also were u able to use your orginal tach or did u have to use an e36 one?

                        Comment


                          #13
                          where did you get the forged crank???
                          e30sport.net
                          '86 325es - s54b32tu - 6-speed - Mtech 1
                          '89 325is - m20b25 - 5-speed - Individual​
                          '06 M3 Competition - 6-speed
                          '19 Porsche GT3 RS - 7-speed PDK
                          '94 Lancia Delta HF Integrale EvoII - Giallo Ginestra
                          '97 Range Rover Vitesse

                          Comment


                            #14
                            again i will say, very nice.

                            but why did u decide to go single throttle over s50/52 multi?

                            i know u have been asked before but i just cant seem to remember, what kidna hp/tq numbers are u expecting when its all finished.
                            98 M3/4/5

                            Comment


                              #15
                              Stock M3 cams are awesome for the street. I could go with Schricks and solid lifters and have lots of power til 7500+, but I really like the midrange of the stock cams.

                              I havn't dyno'd yet, but I'd say it puts down about 230whp right now. It isn't tuned at all, and I still have the small injectors and a chip designed for a stock 3.0L. I'll get the AA software and install the injectors sometime soon.

                              Comment

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