2.93LSD in m50 swap

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  • GunMetalGrey
    E30 Fanatic
    • Dec 2010
    • 1499

    #1

    2.93LSD in m50 swap

    Debating on grabbing a 2.93LSD for My m50 swap, running the gt260, m50b25tu, and cams soon. I would like to boost in the future. Would.the diff kill the NA motor?
  • hoveringuy
    R3VLimited
    • Dec 2005
    • 2679

    #2
    I think the 2.93 is too tall behind an M50/G260. I'm running a 3.25 with a 3 litre and it's as tall as I'd ever want to get.

    You want the 3.73, 3.25 would be fine with boost.

    Comment

    • GunMetalGrey
      E30 Fanatic
      • Dec 2010
      • 1499

      #3
      Kind of what I was thinking, thanks for confirming!

      Comment

      • lolcantturn
        R3V Elite
        • Oct 2010
        • 4588

        #4
        I run a 2.79 LSD. Still can get some decent wheel spin shifting into 2nd with good tires. Mine is a highway monster and it's pretty babied. A bit hard to get it sideways when you want to though.
        Originally posted by TSI
        ♫ Rust flecks are falling on my head...♫
        OEM+

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        • Mako18
          Mod Crazy
          • Jul 2006
          • 688

          #5
          I have a 2.93 behind a m50/gretrag 250 and its not bad at all. A 3.25 would be better.
          sigpic

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          • nrubenstein
            No R3VLimiter
            • Feb 2009
            • 3148

            #6
            Originally posted by Mako18
            I have a 2.93 behind a m50/gretrag 250 and its not bad at all. A 3.25 would be better.
            Pay closer attention. A 2.93 behind a G250 is roughly equivalent to a 3.64 behind a G260 in 5th. (Other gears vary.)
            2006 GMC Sierra 2500HD 4WD LBZ/Allison
            2002 BMW M3 Alpinweiß/Black
            1999 323i GTS2 Alpinweiß
            1995 M3 Dakargelb/Black
            - S50B32/S6S420G/3.91
            1990 325is Brilliantrot/Tan
            1989 M3 Alpinweiß/Black

            Hers: 1996 Porsche 911 Turbo Black/Black
            Hers: 1988 325iX Coupe Diamantschwartz/Black 5spd

            sigpic

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            • NbAmTwE
              Advanced Member
              • Jul 2010
              • 148

              #7
              Anyone run a 4.10 with G260+M50b25tu?
              UNDER CONSTRUCTION - 24v 325e (future DD), DD 525i


              stripped out e30 rally project - in progress
              M50NV -> M50TU E34 swap underway

              Comment

              • lolcantturn
                R3V Elite
                • Oct 2010
                • 4588

                #8
                Originally posted by NbAmTwE
                Anyone run a 4.10 with G260+M50b25tu?
                yup



                It is the worst thing ever.
                You will shift 12 times to get up to 60mph, then once you reach 61mph you are on the rev limiter.
                Originally posted by TSI
                ♫ Rust flecks are falling on my head...♫
                OEM+

                Comment

                • nrubenstein
                  No R3VLimiter
                  • Feb 2009
                  • 3148

                  #9
                  Originally posted by NbAmTwE
                  Anyone run a 4.10 with G260+M50b25tu?
                  Im running this combination with my S50 right now. Honestly, it's getting kind of annoying.
                  2006 GMC Sierra 2500HD 4WD LBZ/Allison
                  2002 BMW M3 Alpinweiß/Black
                  1999 323i GTS2 Alpinweiß
                  1995 M3 Dakargelb/Black
                  - S50B32/S6S420G/3.91
                  1990 325is Brilliantrot/Tan
                  1989 M3 Alpinweiß/Black

                  Hers: 1996 Porsche 911 Turbo Black/Black
                  Hers: 1988 325iX Coupe Diamantschwartz/Black 5spd

                  sigpic

                  Comment

                  • NbAmTwE
                    Advanced Member
                    • Jul 2010
                    • 148

                    #10
                    ^ lol well shit
                    I need a 3.73 or 3.25 then!
                    UNDER CONSTRUCTION - 24v 325e (future DD), DD 525i


                    stripped out e30 rally project - in progress
                    M50NV -> M50TU E34 swap underway

                    Comment

                    • lolcantturn
                      R3V Elite
                      • Oct 2010
                      • 4588

                      #11
                      Originally posted by nrubenstein
                      Im running this combination with my S50 right now. Honestly, it's getting kind of annoying.
                      Kind of? I got tired of it in the first day.

                      What is 1st gear "crawling" traffic on any regular gearing, you're shifting between 1st, 2nd, and 3rd with a 4.10. Gets annoying QUICK. I can stayon 1st gear with my 2.79 in traffic with no problem and no annoyance.
                      Originally posted by TSI
                      ♫ Rust flecks are falling on my head...♫
                      OEM+

                      Comment

                      • GunMetalGrey
                        E30 Fanatic
                        • Dec 2010
                        • 1499

                        #12
                        Any videos of the 2.93? I have a 4.10 in it now, and driving my 318 with a 4.10 makes it obvious that a 4.10 with an m50 would be horrible.

                        Comment

                        • MaksV
                          E30 Enthusiast
                          • Oct 2010
                          • 1042

                          #13
                          I run a 3.73 with my non vanos feeding a G260. I spin at 3500 @ 85mph in top gear. Did a road trip over spring break. ~700 miles got about 26mpg. Spent most of the highway time over 80...

                          I love it.
                          CHEAP REBUILT INJECTORS




                          Need Quality Brakes? BimmerBrakes has it!
                          For anything Else go with BluntTech!

                          Comment

                          • TopOfTheLine89
                            E30 Modder
                            • Jun 2007
                            • 919

                            #14
                            I hate my 4.10. its only saving grace is that its a LSD. Also running a g240 so it's extra miserable. Probably a good auto x and drag setup but that's about it. Need to find a 2.93 LSD bad.
                            97 tacoma 5 spd 4 cylinder
                            2001 330ci 5 speed
                            83 733i 5 speed, (FS)

                            Comment

                            • ak-
                              R3V OG
                              • May 2009
                              • 12422

                              #15
                              Originally posted by lolcantturn
                              yup



                              It is the worst thing ever.
                              You will shift 12 times to get up to 60mph, then once you reach 61mph you are on the rev limiter.
                              That's weird. It took me 9 shifts in my friends car.
                              Maybe your speedometer is off.

                              1991 325iS turbo

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