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    • Nizpro abandons BMW N54 ZF 6HP21 6-speed automatic transmission development

      This is disappointing considering Nizpro's work was so promising. Just over a year ago Nizpro showed their upgrade cutting 1.5X short times on the dragstrip. Their N54 automatic transmission upgrades were supposed to be out by holiday time in 2016 but that date came and went with no release.


      Unfortunately, for multiple reasons, they are getting out of the platform:


      They do not state what the reasons are but their N54 development 335i was put up for sale.

      That leaves automatic N54 owners seeking big power in a bit of a pickle. Propulsive Dynamics claims to have upgrades but for owners making big torque the minimal torque capacity increase offered that still has yet to be proven on the dragstrip is likely a waste of time and money.

      There is always the option of swapping in another automatic transmission which is what some BimmerBoost members are doing with the AD-E 4L80 swap.

      As of right now the most cost effective solution capable of handling the power N54's are making in 2017 is a manual swap. A DCT swap is also possible and becoming more popular although it is more expensive than a manual swap. It does offer quicker shifts and more consistent performance though.

      This article was originally published in forum thread: Nizpro abandons BMW N54 ZF 6HP21 6-speed automatic transmission development started by Sticky View original post
      Comments 43 Comments
      1. Payam@BMS's Avatar
        Payam@BMS -
        Interesting, I think Tony is running one of these and he said it's performed flawlessly. Wonder what happened...
      1. DirtKurt's Avatar
        DirtKurt -
        This is news? They gave up like 6 months ago
      1. Zombie1's Avatar
        Zombie1 -
        If that's the case I'm most likely leaving my 135i behind what a damn blow, 5 years and not one working solution. I was holding out hope sad face. For the cost for the DCT might as well buy a z4 or 35is.
      1. Sticky2's Avatar
        Sticky2 -
        Click here to enlarge Originally Posted by DirtKurt Click here to enlarge
        This is news? They gave up like 6 months ago
        Um Vargas was still talking about being a dealer and testing?

        Also, I didn't see any announcement from Nizpro saying development was officially over. Maybe you forgot to share it?
      1. j_hynson's Avatar
        j_hynson -
        Selling my level 10 trans that held up to the task of a fully built engine and single turbo kit. 2000 miles on it for all y'all that were waiting lol
      1. Flinchy's Avatar
        Flinchy -
        Gotta wonder why

        If nizpro can't do it, I really doubt anyone else can.

        They had multiple upgraded trans' running in the wild, and xhp to tune them so...
      1. Flinchy's Avatar
        Flinchy -
        Gotta wonder why

        If nizpro can't do it, I really doubt anyone else can.

        They had multiple upgraded trans' running in the wild, and xhp to tune them so...
      1. benzy89's Avatar
        benzy89 -
        Was gonna say, xHP is supposed to be another option. But the AD Engineering 4L80E conversion sounds like the best (and only current) option to go with for big power. Does anyone know if they offer a reimbursement or credit for a semi-healthy ZHP (similar to a core swap)? Otherwise, can just dump it on the forums
      1. Eleventeen's Avatar
        Eleventeen -
        I can tell you that any hardware upgrade will be much less effective without being able to properly tune the transmission. Being able to taylor line pressures and shift times is crucial to keeping an electronically controlled automatic transmission alive at high torque levels. Until the 6HP21 TCU and firmware is properly cracked, there likely won't be a transmission build that can stand up long-term behind a max effort N54. Actually, a proper tune on the stock 6HP21 would go a long way.
      1. Eleventeen's Avatar
        Eleventeen -
        Also wanted to add, even if the TCU firmware has already been cracked by someone (not sure at this point), the tuner still needs to know what they are doing with this trans. Once the tuning aspect is fully figured out, these transmissions will probably hold up pretty well. Also, you will be able to start dicking around with higher stall converters. That will greatly reduce short times on a big turbo setup.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by benzy89 Click here to enlarge
        Was gonna say, xHP is supposed to be another option. But the AD Engineering 4L80E conversion sounds like the best (and only current) option to go with for big power. Does anyone know if they offer a reimbursement or credit for a semi-healthy ZHP (similar to a core swap)? Otherwise, can just dump it on the forums
        @andy_divers
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Eleventeen Click here to enlarge
        Until the 6HP21 TCU and firmware is properly cracked, there likely won't be a transmission build that can stand up long-term behind a max effort N54. Actually, a proper tune on the stock 6HP21 would go a long way.
        Hopefully BimmerBoost will be able to help with this.
      1. 135i2's Avatar
        135i2 -
        Nizpro are still building transmissions with all their developed hardware.

        The only thing they have taken a back seat on is the software development.
      1. j_hynson's Avatar
        j_hynson -
        Click here to enlarge Originally Posted by 135i2 Click here to enlarge
        Nizpro are still building transmissions with all their developed hardware.

        The only thing they have taken a back seat on is the software development.
        Got a statement from them that contradicts the above screen shot?
      1. 135i2's Avatar
        135i2 -
        I spoke with Simon (the owner) by phone this morning.

        They are still building transmissions and they will be building mine very soon. One day the software will catch up with the hardware and it should be a good thing.
      1. Tony@VargasTurboTech's Avatar
        Tony@VargasTurboTech -
        I have not spoke to Simon in quite some time. Last I heard they were busy with other stuff, but had not given up. We still have our trans. We will be putting it through its hard paces, and seeing how it does once we get the race car up, and running.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by 135i2 Click here to enlarge
        Nizpro are still building transmissions with all their developed hardware.

        The only thing they have taken a back seat on is the software development.
        I don't understand why they said they are getting out of the platform entirely then?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by 135i2 Click here to enlarge
        I spoke with Simon (the owner) by phone this morning.

        They are still building transmissions and they will be building mine very soon. One day the software will catch up with the hardware and it should be a good thing.
        So why did they say they have software then? What is the software issue?
      1. 135i2's Avatar
        135i2 -
        Click here to enlarge Originally Posted by Tony@VargasTurboTech Click here to enlarge
        I have not spoke to Simon in quite some time. Last I heard they were busy with other stuff, but had not given up. We still have our trans. We will be putting it through its hard paces, and seeing how it does once we get the race car up, and running.
        Yes, Nizpro flat out on other large projects. Look forward to seeing how the trans holds up.
      1. 135i2's Avatar
        135i2 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        So why did they say they have software then? What is the software issue?
        No software issues that I understand. Reading between the lines across forums and the like, they paid someone a lot of money to develop software...then we have xhp.

        Nizpro are not putting time into the electronic side of things but will build the box with all the billet parts and goodies inside.