• Trouble in paradise? Vishnu/FFtec N54 335ii Single Turbo kits experiencing issues as a BimmerBoost member runs 12.5@121 with misfires and having to short shift

      BimmerBoost would like to thank member GeorgiaTech335Coupe for his openness and honesty regarding his Vishnu/FFTEC single turbo setup. Recently, this member took his single turbo upgraded 6-speed manual 335i to the PBIR (Palm Beach International Raceway) dragstrip in Florida to do some testing. His best run was a 12.50@121.6 alongside a 12.8@117. Yes, these times are quite a ways away from the 10.8@131 glory pass from Vishnu demonstrating the kits capability.


      This is in no way the fault of GeorgiaTech335Coupe who experienced misfires on his car and had to short shift at 6300 rpm in order to avoid them. Now, Vishnu has basically portrayed this kit as perfect and ready for sale with nobody having any issues. The reason BimmerBoost is bringing this issue to the attention of the community is for potential buyers to understand what they are getting into.


      There is absolutely nothing wrong with having issues when modifying a car to this level and BimmerBoost is confident Vishnu will resolve them. There is something wrong with pretending nothing is wrong. A few cars with the single turbo kits have gone up for sale and apparently a total of three people, that are willing to open their mouths, are having misfire issues with these kits.

      These issues will no doubt get resolved but potential buyers and current customers needs to be aware of the process, effort, and that progress is being made. Pretending nothing is wrong and collecting money simply is the wrong way to go about this and once again (it's becoming a trend) BimmerBoost is the only site bringing these issues to the attention of the community.

      For the record, a member by the name of @tmo335tt says he has a hardware solution for the misfires that he will likely share with Vishnu (hopefully not for free). Interesting that it isn't Vishnu but the community solving this.

      Thanks again to @GeorgiaTech335Coupe for sharing his details, good or bad, as we all learn thanks to honesty and openness. There is more to tuning than just collecting money.
      This article was originally published in forum thread: Vishnu Single Turbo at PBIR - 12.50@121.6 having to shift all gears at 6300rpm started by Sticky View original post
      Comments 1090 Comments
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by tmo335tt Click here to enlarge
        Hey Sticky....Do you ever get that feeling that you might have $#@!ed with the wrong person?
        No... but you're about to experience that feeling right about... now.
      1. DefactoM6's Avatar
        DefactoM6 -
        Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
        FWIW I didn't notice any RB turbo cars at the runway race who had 4->5th gear shifting problems. Only the issue of the trans sometimes unlocking anywhere from 140-160mph when fully loaded in 5th.
        You're talking about ATs...this is completely different.
      1. Terry@BMS's Avatar
        Terry@BMS -
        Click here to enlarge Originally Posted by DefactoM6 Click here to enlarge
        You're talking about ATs...this is completely different.
        Was replying to this comment:

        Click here to enlarge Originally Posted by Shiv Click here to enlarge
        How was it a joke? I don't believe you were even there. All the higher HP 6AT cars (even all the BMS RB cars) were having problem with the 4-5th gear change @ 135mph. So wouldn't that make the RB powered 6AT cars jokes too?
        I'm not aware of a single gear change problem. I think he is just trying to lump his tuning headaches in with our trans problems to make it appear everyone has the same problems he has. Here is a log of our problem. Log taken from one of my runway runs where the trans acted up. This is before our flatline fix of course. Click here to enlarge

        I'm well in to 5th pulling hard and then out of nowhere, wham, RPMs shoot through the roof. I've yet to see a single log from any of his single turbo runs there.

        Click here to enlarge
      1. ChuckD05's Avatar
        ChuckD05 -
        i want that boost curve on my VT 2's!!!! ok back to deaththreats and arguing
      1. Anthony@FFTEC's Avatar
        Anthony@FFTEC -
        lol @ people still associating (by this time) an obvious mechanical issue, wether the flywheel or not, for a "tuning" issue.

        Click here to enlarge
      1. themyst's Avatar
        themyst -
        Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
        Was replying to this comment:



        I'm not aware of a single gear change problem. I think he is just trying to lump his tuning headaches in with our trans problems to make it appear everyone has the same problems he has. Here is a log of our problem. Log taken from one of my runway runs where the trans acted up. This is before our flatline fix of course. Click here to enlarge

        I'm well in to 5th pulling hard and then out of nowhere, wham, RPMs shoot through the roof. I've yet to see a single log from any of his single turbo runs there.

        http://www.bimmerboost.com/images/im...c1d13526-1.jpg
        That happened to me once on Cobb race logic, never happened on regular code. I've taken my car to 6500 rpm in 5th gear at 21 psi. Maybe my tranny is healthier who knows.
      1. Terry@BMS's Avatar
        Terry@BMS -
        It would come up some runs and not others for me. Still have not really had a chance to look in to it. I don't spend a lot of time in 5th gear @ 150mph accelerating. Click here to enlarge
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by trbolexis Click here to enlarge
        lol @ people still associating (by this time) an obvious mechanical issue, wether the flywheel or not, for a "tuning" issue.

        Click here to enlarge
        I think people have questions regarding AT misfires and if those are tune related. There are multiple issues here not 1.
      1. dzenno@PTF's Avatar
        dzenno@PTF -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I think people have questions regarding AT misfires and if those are tune related. There are multiple issues here not 1.
        AFAIK ATs don't misfire. They have transmission (gear shift) issues from 4 to 5. Not even a workaround is known for these at the moment. If I had to guess the fix here will be software based once we're inside the transmission computer and can adjust things properly.

        6MTs have misfire issues past 6k rpm. A workaround exists using Cobb to disable misfire detection which still seems to be the only way to get around this issue, although it is a workaround and not a solution, but its FREE and DOES NOT impose a safety issue with the motor. All you end up doing with misfire detection off is having a chance of polluting the environment more in the case of a TRUE misfire (which can/will be felt as the car will feel like it stumbles and there will very possibly be black smoke visible coming out the tailpipes). THIS is the reason why BMW has logic to do a FUEL CUT and not let it ride out. Its very unlikey that something like that will go 100% unnoticeable including dyno plots at ZERO smoothing.

        Until the DMFW theory is proven everyone needs to just ignore Shiv's e90 thread which is prematurely stated as a "solution" without even mounting the flywheel on the car and running it.

        As an aside, I don't think there's anyone that's been more fed up with that high RPM misfire than me. At least now it seems my car isn't alone in this fight. The more people we have looking at this seriously the better.

        At the same time I'm not worried about it as much as before though and really think the real solution in the end will be software based not hardware. I have zero issues turning the misfire detection monitor OFF on a car that's outputting 2-2.5 times more power/torque than it came from the factory in the meantime until we know exactly how the misfire detection algo works and if/how it can be adjusted.

        Again, if the single mass flywheel doesn't fix it, just turn the misfire detection off guys and ENJOY your cars until we see what's going on in the DME Click here to enlarge
      1. CaptainInsano's Avatar
        CaptainInsano -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        No... but you're about to experience that feeling right about... now.
        You banned him? Dude... he was helping everyone. He had a couple of confrontational comments, but it's nothing worse than what other people have said here before. Click here to enlarge
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by CaptainInsano Click here to enlarge
        You banned him? Dude... he was helping everyone. He had a couple of confrontational comments, but it's nothing worse than what other people have said here before. Click here to enlarge
        Huh? Nobody is banned. And he started trolling insulting people pretty hard. Either way, irrelevant, we know what the fix is.
      1. themyst's Avatar
        themyst -
        Click here to enlarge Originally Posted by CaptainInsano Click here to enlarge
        You banned him? Dude... he was helping everyone. He had a couple of confrontational comments, but it's nothing worse than what other people have said here before. Click here to enlarge
        If I said what he said to Shiv on e90, what would happen? Just saying.
      1. dzenno@PTF's Avatar
        dzenno@PTF -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Huh? Nobody is banned. And he started trolling insulting people pretty hard. Either way, irrelevant, we know what the fix is.
        I don't think that was fair of you to neg rep him to -90 because he talked back to you or whoever in any tone. That's just my opinion. If anything that's a bit abusive on the rep system we have on here IMHO You do realize you gave him -90 right?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by dzenno@ProTUNING Freaks Click here to enlarge
        I don't think that was fair of you to neg rep him to -90 because he talked back to you or whoever in any tone. That's just my opinion. If anything that's a bit abusive on the rep system we have on here IMHO You do realize you gave him -90 right?
        Do whatever you want with your rep and I'll do whatever I want with mine.

        If someone starts threatening you, maybe you'll react differently. Regardless, I disagree with you and the decision was already made so move on.
      1. dzenno@PTF's Avatar
        dzenno@PTF -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Do whatever you want with your rep and I'll do whatever I want with mine.

        If someone starts threatening you, maybe you'll react differently. Regardless, I disagree with you and the decision was already made so move on.
        Are we limited in the amount of rep we can give/take in any way? Mine was set to 1 I think. I bumped it to a 100 and I can still only give 10-20 I think. Does the same go for negative reps?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by dzenno@ProTUNING Freaks Click here to enlarge
        Are we limited in the amount of rep we can give/take in any way? Mine was set to 1 I think. I bumped it to a 100 and I can still only give 10-20 I think. Does the same go for negative reps?
        How in the world are you going to set it to 100 when your rep power is 17? 17 is the max you can set it to.

        Neg rep is half positive rep. So think about that and also realize others neg repped him.

        This isn't the place for a rep discussion, go read the rep thread, moving on.
      1. jpsimon's Avatar
        jpsimon -
        I positive repped him!
      1. dzenno@PTF's Avatar
        dzenno@PTF -
        Click here to enlarge Originally Posted by jpsimon Click here to enlarge
        I positive repped him!
        I pos repped before when good discussion was flowing.
      1. Ak335i's Avatar
        Ak335i -
        lol... idk ive had my run in with trbolexis over "there" he came down hard on me when i was simply talkin about what ive done with my car and was responding to someone else's ridiculous babbling. He then tried crapping all over me saying basically my car was garbage lol and running consistent 11s full weight street tires no meth was basically not worth sharing. Maybe hes changed though. Lol
      1. import36's Avatar
        import36 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Do whatever you want with your rep and I'll do whatever I want with mine.

        If someone starts threatening you, maybe you'll react differently. Regardless, I disagree with you and the decision was already made so move on.
        nazi-boost?

        <ready to get negative-repped into oblivion>