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e flywheel vs. i flywheel

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    e flywheel vs. i flywheel

    Does anybody know the difference?

    Can an e flywheel be used with an i engine and clutch?

    #2
    e is dual mass, clutch is solid center. i is single mass, sprung center. clutch and flywheels are not interchangleable, must be swapped together. you dont wanna run an E flywheel on an I car anywayz, thats just stupid.
    IG: @Baye30

    FRONT VALENCE IS ZENDER!!! STOP FILLING MY PM BOX PPL!!!

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      #3
      You don't want to run a e flywheel on a e either but thats just how BMW rolls... Curse my e to hell!
      1985 325e 2.8 Turbo VEMS

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        #4
        Originally posted by golde30 View Post
        e is dual mass, clutch is solid center. i is single mass, sprung center. clutch and flywheels are not interchangleable, must be swapped together. you dont wanna run an E flywheel on an I car anywayz, thats just stupid.
        Still have your flywheel for sale?

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          #5
          Originally posted by E30Alex View Post
          Still have your flywheel for sale?
          yeah i still have a flywheel for sale. i had 2 sold 1. the one i have is freshly resurfaced, the only problem is that i left it at the shop for like 6 months, and still havent picked it up. its paid for, i just never got around to picking it up...LOL.
          IG: @Baye30

          FRONT VALENCE IS ZENDER!!! STOP FILLING MY PM BOX PPL!!!

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            #6
            when i did my 5 speed swap i took all the parts from an 85 325 and it had a single mass flywheel....

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              #7
              84-85 etas have single mass flywheels that weigh in at ~23ish lbs. The "i" flywheel weighs about ~19 lbs. Late eta dual mass flywheels weigh something like ~28-29 lbs. Horrible weight.

              I have a early single mass flywheel in my '87 eS.

              I weighed all of the different flywheels a couple of weeks ago because I was curious.

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                #8
                I flywheel in e tranny?

                I've been searching but I can't find a difinitive answer, so sorry for bumping this thread.

                I'm building a stroker and I'm wondering if the i flywheel will work on the eta transmission. I always assumed the trannys were the same but someone here said they were different.

                So, can I put the i flywheel on my super eta block/crank and put it in my stock eta tranny?
                "Life is hard...it's a lot harder if you're stupid."

                Tom
                72 2002
                87 327i
                88 525i
                88 535i
                03 530i

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                  #9
                  Not all E's have dual mass, only the last year of production. I think they started 5.86.

                  My 4.86 eS had a single mass flywheel.

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                    #10
                    Well, mine was built 5/87. Will there be a problem? If so, what could it be? I guess I have to wait until I get my motor out and see.
                    "Life is hard...it's a lot harder if you're stupid."

                    Tom
                    72 2002
                    87 327i
                    88 525i
                    88 535i
                    03 530i

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                      #11
                      deff. dual mass.

                      Put the I flywheel on, and since you're building a stroker, convert to 1.3 motronic while you're at it. I imagine you're using I head as it is.

                      Difference is that E has those 2 reference sensors in trans bell housing. I has sensor on the front of the engine and one on ignition wire.

                      Use I flywheel and I clutch and you'll be fine. if you want to use same bell housing sensors you can, but make sure that flywheel has reference marks or dowel pins.

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                        #12
                        THANK YOU! Yeah, I got a whole complete i engine with harness and I'm putting a seta block under it all. So I can just put the i fw and clutch on and disconnect the tranny sensors if I use the 1.3 harness, cool. Just thankful there aren't any dimensional differences.
                        "Life is hard...it's a lot harder if you're stupid."

                        Tom
                        72 2002
                        87 327i
                        88 525i
                        88 535i
                        03 530i

                        Comment


                          #13
                          Originally posted by rThor432 View Post
                          84-85 etas have single mass flywheels that weigh in at ~23ish lbs. The "i" flywheel weighs about ~19 lbs. Late eta dual mass flywheels weigh something like ~28-29 lbs. Horrible weight.

                          I have a early single mass flywheel in my '87 eS.

                          I weighed all of the different flywheels a couple of weeks ago because I was curious.
                          You weighed a late I style flywheel, and it was only 19lbs? are you sure it hasn't been lightened, that doesn't sound right to me... Interesting.
                          - Sean Hayes

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                            #14
                            wait a second, sounds bad.

                            My I flywheel was 16.8lbs. weighed it, my dual mass E flywheel 23.9lbs.

                            How did you weigh them?
                            I never weighed early single mass flywheel, but there's no way in hell it weigh 1 pound under dual mass. It's about the same size as I flywheel minus 2 pins.

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