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4HP22 trans on the dyno

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    4HP22 trans on the dyno

    So im installing a megasquirt on my E34 525i. I got a M20B25 and a 4HP22 (not EH, no electronics).

    Is there any way or trick to make easier the dyno sessions?
    You can limit the max gear for the car, but you cant limit the lower one. So the transmision wont stay say in 3rd gear during the whole pull. Which is a bit annoying during the drivetrain loss part.

    Is there any way to make it so the transmision will stay the longest time on 3rd gear? maybe fiddling with the cable that goes from the throttle body into the trans?
    ---E30 320i Hennarot 1984 Sedan---

    #2
    Just move the shift lever to "3"
    Seat Shocks....I have passed the baton to John Christy from Ninestitch. Email John or Garrett at ninestitch1@gmail.com

    https://www.r3vlimited.com/board/sho...86#post4944786
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      #3
      right, but that limits the top gear. but not the lower one.

      so the car will do 1-2-3, not just 3rd. since i cant make it stay in 3rd. is there any way playing with the cable to make it go into 3rd as early as possible and stay there when off the throttle? if i could have a long pull, say 2500 to 6500rpm and back to 2500rpm. that would be good enough.
      ---E30 320i Hennarot 1984 Sedan---

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        #4
        I have no idea if this will work, but may be worth trying, as it seemed to work in this thread:

        First 3 pulls I was getting a bad misfire. Pulled the plugs regaped to .25 on some new bpr8es plugs and threw down 307whp heres the stats Chinabay turbo Stock ft block head intake and exhaust removed cat 20psi with a fluttering wastegate 75lb injectors and e85! tlao chips and lh 2.4 super...


        Those guys are talking about a Volvo AW7x trans, but it's a cable kickdown trans, same idea as your 4hp22.

        Fun fact, Some Volvo's of this era actually got the same 4hp22 trans as our BMW's, with an appropriate bell housing of course.
        85 325e m60b44 6 speed / 89 535i
        e30 restoration and V8 swap
        24 Hours of Lemons e30 build

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