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    e30 m20 questions

    Alright I got r3v link from a guy on azbmw.org...so heres a repost of my question

    okay, i have my eta's engine half way taken apart and have a few questions... What parts do I need to make a stroker motor? I do know( I think I know) I need a "i" camshaft, probably need a larger maf (a 3.5?), injectors (19 lbs?), and an "i" ecu/chip upgrade...Am I wrong or anything else?

    Is there a difference between "i" and "e" throttle bodies and intake manifolds?

    "i" head/valves needed?

    anything else?

    Any suggestions/pointers/additional help is always welcomed....

    -Chris

    BTW Hello to allow, I plan to be active on the boards now that I have signed up!
    1985 BMW 325e
    1997 BMW M3/4/5
    2007 Chevy Silverado Crew Cab 5.3 v8

    #2
    to do a stroker you need a crank with a bigger stroke.
    89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

    new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

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      #3
      You're already on your way to building what most people would call an M20 stroker, since you've got an eta crank. If you wanted a stroker eta, you would need a different crank, yes.

      The i head breathes better, as does the i intake manifold.
      The current fleet:
      1992 325ic: 148k-171k miles
      1999 Chevrolet Tahoe LT 4WD, 114k-142k miles
      1984 MasterCraft Stars and Stripes Powerslot (not a car :D) PCM Ford 351W, 904 hours

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        #4
        basically you'll want everything off the i from the head all the way to the airbox. this includes the ECU (if you're sticking to motronic) and the engine harness.

        as far as the bottom end, you can use the stock eta pistons and rods, but unless you are going to turbo the compression ratio will be too low. you can get custom forged pistons for around $600-$900, and use either i or e rods (the e rods are shorter, I'd prefer the i rods personally).

        also, E30s don't have MAFs.. :p
        Build thread

        Bimmerlabs

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          #5

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            #6
            WOW!!! Thanks guys..The power of internet and I thought it was only good for porn ;)
            1985 BMW 325e
            1997 BMW M3/4/5
            2007 Chevy Silverado Crew Cab 5.3 v8

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              #7
              Originally posted by e30e View Post
              WOW!!! Thanks guys..The power of internet and I thought it was only good for porn ;)
              me too.

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