s50 shortblock

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  • weaksauce
    E30 Addict
    • Apr 2009
    • 550
    #1

    s50 shortblock

    i have a s50 shortblock I picked up yesterday. I haven't inspected it yet, but I am assuming everything on the bottom is good. it blew a head gasket before it was pulled.

    so i have a block, pistons, rods and crank.

    Is any of this stuff useful? I did a quick search and it looks like the rods are lighter than the M20 rods, the crank would make some sort of a stroker if installed in a M20

    pistons good for anything?

    Would i be better off just finding a head for this motor and buying some cams and making a complete motor out of it, or parting it out?

    i don't have a spare e30 to swap this into right now. I have a 91 with a M30B35 in it I am about to have running, but after that I will be looking for something fun to build.

    ideas?
    Tags: None
    • triggrhaapi
      Grease Monkey
      • Feb 2007
      • 350
      #2
      You'd be better off with an M52B25 bottom end. Better rod ratio.
      1987 BMW 325is | Frankenmotor S50 | Supersprint Replica Headers | K&N Intake | Gutted Stock Midpipe | Zimmermann Rotors | Stainless Brake Lines | Porterfield Racing Pads

        Comment

        • jrdeamicis
          E30 Modder
          • Nov 2008
          • 956
          #3
          Does it have anything else besides the shortblock?
          Past Car : E30 S50 6 Speed 5 Lug 3.73
          Current : Z3 S50 OBD2 (Smog Legal) 6 Speed BBS RN Dual Ear Diff
          ___________________________________________
          BNB Designs
          Engine Swaps, Fabrication, Innovation, General Repair
          Richmond CA
          Julian 848-248-8029

            Comment

            • Wh33lhop
              R3V OG
              • Feb 2009
              • 11705
              #4
              I believe you can use the crank for an M20, but you'll need a crank spacer. If you have the cash for it, I guess you could always just get a head and go straight for sunbelts...
              paint sucks

                Comment

                • triggrhaapi
                  Grease Monkey
                  • Feb 2007
                  • 350
                  #5
                  I would do that ^

                  The M20 head flows HORRIBLY compared to the 24V.
                  1987 BMW 325is | Frankenmotor S50 | Supersprint Replica Headers | K&N Intake | Gutted Stock Midpipe | Zimmermann Rotors | Stainless Brake Lines | Porterfield Racing Pads

                    Comment

                    • weaksauce
                      E30 Addict
                      • Apr 2009
                      • 550
                      #6
                      Originally posted by jrdeamicis
                      Does it have anything else besides the shortblock?
                      block, crank, pistons, rods, oil pump windage tray ac bracket, crank pulleys
                      thats it I think

                      what do you need?

                        Comment

                        • weaksauce
                          E30 Addict
                          • Apr 2009
                          • 550
                          #7
                          Originally posted by Wh33lhop
                          I believe you can use the crank for an M20, but you'll need a crank spacer. If you have the cash for it, I guess you could always just get a head and go straight for sunbelts...
                          there is a head and a M50 intake mani at the local pick and pull
                          i could grab all the electronics too.
                          Did they ever get the sunbelts working right? When I built my S52 about 4 years ago they were having hell with them. No one could make them run right.

                          I went with schricks in my S52 instead. best mod i ever did to that car. Even if it was just for the sound!

                            Comment

                            • Wh33lhop
                              R3V OG
                              • Feb 2009
                              • 11705
                              #8
                              I know of a few people using sunbelts in builds, now whether they actually got them running well yet I'm not sure of. As I recall they typically run a bit more aggressive of a profile when compared to their respective schrick counterparts.
                              paint sucks

                                Comment

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