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    For those of you with oil temp and pressure gauges...

    What psi does the m20 run at? I found a old VDO 5 bar (72 psi) gauge and was wondering if it is enough. I've seen other oil gauges that up to 10 bar. Also what is normal oil temp? The matching oil temp gauge reads 60-170C.
    ส็็็็็็็็็็็็็็็็็็็็็็็็็
    Originally posted by blunttech
    I need you to exfoliate my ballsack
    Build Thread?




    #2
    You need to match the sending unit to the gauge. They will have an ohm range. The two need to match. E30 oil pressure will be all over the chart depending on oil weight, motor, mileage, temperature, ect. You don't need to worry about the high end as much as you do what the low end is. That's the important number. The idiot light is 7 or 7.5 PSI.
    Originally posted by Matt-B
    hey does anyone know anyone who gets upset and makes electronics?

    Comment


      #3
      Yeah the sending unit is no prob. I was just wondering in case the m20 put out at 100 pounds.

      Not my pic but the gauges are the same.
      ส็็็็็็็็็็็็็็็็็็็็็็็็็
      Originally posted by blunttech
      I need you to exfoliate my ballsack
      Build Thread?



      Comment


        #4
        Originally posted by Click View Post
        What psi does the m20 run at? I found a old VDO 5 bar (72 psi) gauge and was wondering if it is enough. I've seen other oil gauges that up to 10 bar. Also what is normal oil temp? The matching oil temp gauge reads 60-170C.
        Hey can you post pics of the oil temp sender where it comes out of the block? I'm about to do mines ?

        Comment


          #5
          Regular e30s don't have a oil temp sender stock. There's many different places you can place a sensor and it is up for debate which is the best location.

          Various locations

          Stock E30 M3 has both sensors in the housing.


          Drain plug


          Tap the hollow housing bolt.


          Oil distribution block.


          Sandwich place for the oil filter housing that has threaded ports for oil sensors and aux lines.
          ส็็็็็็็็็็็็็็็็็็็็็็็็็
          Originally posted by blunttech
          I need you to exfoliate my ballsack
          Build Thread?



          Comment


            #6
            Nice post Click.
            Originally posted by Matt-B
            hey does anyone know anyone who gets upset and makes electronics?

            Comment


              #7
              Thanks
              ส็็็็็็็็็็็็็็็็็็็็็็็็็
              Originally posted by blunttech
              I need you to exfoliate my ballsack
              Build Thread?



              Comment


                #8
                hmmm. my gauge is reading about 10-25 psi.... rwd block in an ix with oil pump conversion. but my light doesnt come on when im driving. it comes on when i start it.
                sigpic

                http://r3vlimited.com/board/showthread.php?t=201774

                Comment


                  #9
                  My oil pressure gauge seems to read around 60-80 psi at startup when cold. I use 20w50. At idle when it's warm it hangs around 20 or so.

                  My oil temp is a consistent 200 degrees under normal driving once everything has warmed up. During hard driving or track stuff it'll creep up to 220.

                  I use a sandwich adapter btw. They're picky about how they're installed and can weep sometimes.
                  -Geno

                  '87 325is (s52'd)
                  '95 525iT
                  '02 Range Rover 4.6 HSE
                  '98 Disco 1

                  Comment


                    #10
                    Why not get some gauges that you can understand? Possibly something not 20 years old.
                    BimmerHeads
                    Classic BMW Specialists
                    Santa Clarita, CA

                    www.BimmerHeads.com

                    Comment


                      #11
                      not to sidetrack, but my 87 325e idiot light blinks sometimes at idle. My idle may be a tiny bit low 650ish, but I don't think my pressure should drop that low at 650.. what do you guys think? running 10w30 right now, probably should switch to 20w50.

                      Comment


                        #12
                        Might be dirty connections between the sender and the idiot light somewhere causing an increase in resistance.

                        Comment


                          #13
                          thanks man, that makes a ton of sense because the wire is old and brittle. time to replace.

                          Comment


                            #14
                            I've been running VDO electric gauges for 15 years on all my E30's. Do what the factory does, install the senders in the oil filter housing or block and not the oil pan. It's been proven on this forum that the pan readings will be a few degrees cooler than at the oil filter housing. I have senders both in the pan (previous owner) and block (oil pressure adaptor) on my convertible and verified this myself. M20 oil temps are cool around 165-180F and a bit more on hot days in traffic or hard driving. M20B25 oil pressures can be as low as 7PSI idle and upto 65-72PSI at high rpms. A 72PSI gauge is kinda pushing it. 80PSI would give a bit more room. I run a 150PSI gauge which is overkill and I don't think it's ever been past 85-90PSI. Also, the oil pressure senders are extremely sensitive. It matters how and where you mount them. On my M3 and M Tech, I had erratic readings when I had it installed directly on my oil filter housing. After I remote mounted it the readings were steady and accurate. The sender will last a lot longer too. I had read that VDO oil pressure senders must be mounted within 45 degrees of vertical to be accurate as well. Jim Powell from DDM can verify this.
                            "I'd probably take the E30 M3 in this case just because I love that little car, and how tanky that inline 6 is." - thecj

                            85 323i M TECH 1 S52 - ALPINEWEISS/SCHWARZE
                            88 M3 - LACHSSILBER/SCHWARZE
                            89 M3 - ALPINEWEISS II/M TECH CLOTH-ALCANTARA
                            91 M TECHNIC CABRIO TURBO - MACAOBLAU/M TECH CLOTH-LEATHER

                            Comment


                              #15
                              Originally posted by reelizmpro View Post
                              It's been proven on this forum that the pan readings will be a few degrees cooler than at the oil filter housing
                              Well, not "proven" - but that's been a few people experience.

                              Originally posted by reelizmpro View Post
                              The sender will last a lot longer too. I had read that VDO oil pressure senders must be mounted within 45 degrees of vertical to be accurate as well. Jim Powell from DDM can verify this.
                              I've never heard this - I'll look into it - my guess is that it's flat wrong. But for the time being, I wouldn't trust a single thing anyone at DDM told you. They are a bunch of idiots.
                              Originally posted by Matt-B
                              hey does anyone know anyone who gets upset and makes electronics?

                              Comment

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