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    • 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. dzenno@PTF's Avatar
        dzenno@PTF -
        Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
        But it did. Remember, they had a CPS programming error and board design error and "fixed" the problem with Rev 2.5? Maybe he suspected the CPS was interfering with the flash. It's the first thing I would have bypassed as well in his shoes.
        I'm talking about troubleshooting persistent high gear high RPM misfires on 6MTs. Bypassing it entirely didn't help anything on my car.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by amclint Click here to enlarge
        overcome Shiv's premature ST release
        Would it be safe to say he misfired? Click here to enlarge
      1. GeorgiaTech335Coupe's Avatar
        GeorgiaTech335Coupe -
        Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
        Even something as seemingly innocuous as running your coil power through a relay system could contribute or cause it.
        Interesting theory...I'll chew on that one for a little bit.
      1. JStang's Avatar
        JStang -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Would it be safe to say he misfired? Click here to enlarge

        HAHAHA well played.
      1. GeorgiaTech335Coupe's Avatar
        GeorgiaTech335Coupe -
        Click here to enlarge Originally Posted by BuraQ Click here to enlarge
        This is new to me, what is the max PSI that you can dial in before the misfire starts ?
        Haven't had time to test it that much, so I don't know exactly. Did a couple of pulls in JMARS car at lower boost and it was good.

        This issue was just found last week, so it's still new. I didn't have time last week to really delve into it as I work full time for my engineering firm and I also had law school finals last week. I'm hoping this week I can really get to testing different scenarios.
      1. Terry@BMS's Avatar
        Terry@BMS -
        Click here to enlarge Originally Posted by GeorgiaTech335Coupe Click here to enlarge
        Interesting theory...I'll chew on that one for a little bit.
        Personally I suspect the cause is somewhere in the flash. But the DME is very sensitive with it's misfire detection so you just never know... eliminate any possible outside cause you can. You can use a Cobb to eliminate/vindicate the flash, as well, with Shiv's help. If you get to the end of the rope where it's time to pull the head next. Then bypass misfire detection as the last step.
      1. dzenno@PTF's Avatar
        dzenno@PTF -
        Click here to enlarge Originally Posted by nafoo Click here to enlarge
        I think everyone is a little confused by your neutralism when it comes to this topic. It's pretty obvious in this situation that right now, it seems like a Procede specific issue. Yes other cars have had mysterious misfires running different tunes, but those people never fully ruled all potential hardware issues.

        Your neutralism almost looks like you're defending Shiv and his tune, which is downright offensive and blasphemous.

        How dare you.
        I know eh? Click here to enlarge I am and never have been the one to attack or defend anything where it wasn't called for and for good reason. Its public domain that I don't like Shiv and his business ethics. Procede hardware also had clear limitations in the past on this platform which were always construed by him in a different light with people getting banned and ridiculed, myself included, for pointing them out in the past.

        All I'm saying is given my experience troubleshooting this issue that I strongly believe this is something non related to the way piggybacks work, procede included.

        P.S. By the way, how dare you say I'm defending Shiv LOL
      1. rudypoochris's Avatar
        rudypoochris -
        Can the G5 and BMS Cobb run the STs? If so, why don't the ST guys do that? Not saying all problems will be instantly fixed, but with these problems 6 months after laugh it really cant hurt to try... would be funny if the fix was to ditch procede lol.
      1. Terry@BMS's Avatar
        Terry@BMS -
        Click here to enlarge Originally Posted by rudypoochris Click here to enlarge
        Can the G5 and Cobb run the STs? If so, why don't the ST guys do that? Not saying all problems will be instantly fixed, but with these problems 6 months after laugh it really cant hurt to try...
        Technically yes, but we have not written the JB4 boost control code for a single turbo yet. I can't do that until I have one in house to play with for a week or two. So they would be forced to run off the wastegate spring.
      1. rudypoochris's Avatar
        rudypoochris -
        Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
        Technically yes, but we have not written the JB4 boost control code for a single turbo yet. I can't do that until I have one in house to play with for a week or two. So they would be forced to run off the wastegate spring.
        Hermmmm. Wonder if there is one floating around SoCal? Up here in the Bay I am surrounded by these STs apparently, but I haven't seen one yet.
      1. rudypoochris's Avatar
        rudypoochris -
        Click here to enlarge Originally Posted by dzenno@ProTUNING Freaks Click here to enlarge
        P.S. By the way, how dare you say I'm defending Shiv LOL
        Vishnu nut hugger for sure. Click here to enlarge
      1. Sticky's Avatar
        Sticky -
        Stop posting guys!! Apparently Shiv had to schedule another emergency operation due to this thread as his nose grows by an inch every time this thread gains a page. It's really weird.
      1. dzenno@PTF's Avatar
        dzenno@PTF -
        Click here to enlarge Originally Posted by rudypoochris Click here to enlarge
        Vishnu nut hugger for sure. Click here to enlarge
        LOL
      1. Terry@BMS's Avatar
        Terry@BMS -
        Click here to enlarge Originally Posted by rudypoochris Click here to enlarge
        Hermmmm. Wonder if there is one floating around SoCal? Up here in the Bay I am surrounded by these STs apparently, but I haven't seen one yet.
        I can just imagine the online drama if I borrowed a Vishnu car for week. I have been tempted to just order an FFTEC setup for our 135i to play around with but I really have been very happy with the RBs performance. I do like the FFTEC manifold though. And I have no doubt we could do a better job of tuning it. Click here to enlarge

        Side note, I wonder if the o2 sensor placement is related to the misfires? The annoying thing about this stuff is it really could be anything.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
        I can just imagine the online drama if I borrowed a Vishnu car for week. I have been tempted to just order an FFTEC setup for our 135i to play around with but I really have been very happy with the RBs performance. I do like the FFTEC manifold though. And I have no doubt we could do a better job of tuning it. Click here to enlarge

        Side note, I wonder if the o2 sensor placement is related to the misfires? The annoying thing about this stuff is it really could be anything.
        You already do their tech support you might as well move onto their tuning too.
      1. BuraQ's Avatar
        BuraQ -
        +1 on this, I kinda had a strong feeling this was going to go wild when someone, who wasnt shy, brought their car out to a renown track event. Cudos to GeorgiaTech335Coupe

        If ya think about it he could have went out to one of the regular PBIR events at night and not be noticed, thus show the brother had nothing to hide
      1. rudypoochris's Avatar
        rudypoochris -
        Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
        I can just imagine the online drama if I borrowed a Vishnu car for week. I have been tempted to just order an FFTEC setup for our 135i to play around with but I really have been very happy with the RBs performance. I do like the FFTEC manifold though. And I have no doubt we could do a better job of tuning it. Click here to enlarge

        Side note, I wonder if the o2 sensor placement is related to the misfires? The annoying thing about this stuff is it really could be anything.
        I think the end game for this platform is a single log manifold with twin turbos one of which is actuated by a servo controlled butterfly valve. I think we need more in that direction. When I finish this 240z motor swap, I may try that.
      1. Ak335i's Avatar
        Ak335i -
        Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
        I can just imagine the online drama if I borrowed a Vishnu car for week. I have been tempted to just order an FFTEC setup for our 135i to play around with but I really have been very happy with the RBs performance. I do like the FFTEC manifold though. And I have no doubt we could do a better job of tuning it. Click here to enlarge

        Side note, I wonder if the o2 sensor placement is related to the misfires? The annoying thing about this stuff is it really could be anything.

        Im telling you lol

        im this close to pulling the trigger on the Custom 6266 project but all this nonsense has me hesitating. The offer still stands, ill buy you a round trip flight to florida to figure the boost control out. If you accept ill pull the trigger and put the car in the shop to get built Click here to enlarge The car would be ready for boost control by the end of January ish if i pull the trigger

        other wise i guess im going RBs lol

        I know we can run off the wastegate fixed boost, but i want to have boost control as an insurance policy Click here to enlarge

        I really want to do this project but I will not go the FFTec / vishnu route lol
      1. Terry@BMS's Avatar
        Terry@BMS -
        Click here to enlarge Originally Posted by Ak335i Click here to enlarge
        Im telling you lol

        im this close to pulling the trigger on the Custom 6266 project but all this nonsense has me hesitating. The offer still stands, ill buy you a round trip flight to florida to figure the boost control out. If you accept ill pull the trigger and put the car in the shop to get built Click here to enlarge The car would be ready for boost control by the end of January ish if i pull the trigger
        It's one of those things I'd have to do here on a non-rushed timeframe. Would need a car for maybe a week or so. Click here to enlarge

        But maybe wait it out for more single track times on autos. So far I think the RBs might put down better ETs.
      1. Terry@BMS's Avatar
        Terry@BMS -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        You already do their tech support you might as well move onto their tuning too.
        Click here to enlarge