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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. GeorgiaTech335Coupe's Avatar
        GeorgiaTech335Coupe -
        I'll ask some of my GTR buddies how their Vbox was reading compared to their slips at both OSW and PBIR. Don't think we can get more controlled than that.
      1. Ak335i's Avatar
        Ak335i -
        Click here to enlarge Originally Posted by GeorgiaTech335Coupe Click here to enlarge
        The evidence might not be conclusive, but I think it lends towards my opinion.
        I Agree to extent. It did seem weird that i was able to run 11s at 116mph. As far as 60fts, at PBIR with my car, .1 gain in 60ft lends an avg of .2 in ET gain.

        I will also hold to my word, when i get my car back up and running i will pay for your test & tune when we meet at the track. Click here to enlarge

        I will be going thru plenty of issues as well with my one off Single project as is to be expected when pushing the platform.

        Im rooting for you so when all is said and done around march, you and I will have the fastest N54s in the southeast that arent shy at the drag strip. Ill be coming up your way a bit too when the cars done.
      1. GetSomeE92's Avatar
        GetSomeE92 -
        Click here to enlarge Originally Posted by Ak335i Click here to enlarge
        Exactly.. PBIR requires a roll cage at 11.49 ET
        Had i not had to let off the gas due to loss of traction at the 1/8 mile last time out, I would be rocking a cage in a FBO 335i without even meth or DRs. Either way my car will be a daily driver with a cage pretty soon just because i enjoy the strip and there are rules. It doesnt make you not a street car lol
        I was talking to one of the guys that works at the track in the tech line and he said there is a rule change on the horizon regarding cages. I believe he said that for cars made from 2008 and newer that the roll bar threshold will be moved to somewhere in the mid 10 second range. Not sure how credible his source was, but you should look into it before dumping the money on a roll cage if you end up not needing it.
      1. Eleventeen's Avatar
        Eleventeen -
        Click here to enlarge Originally Posted by Q4P Click here to enlarge
        Just to point out, full street car means different things to different people... An Fbo 335i is a full street car to me. You really can't go out and change diffs, build trannies, run gallons of meth, completely shift the power curve, drive on drag radials and still be considered a full street car.
        Why is that not a full street car? Can you get it to the track legally and safely with those mods? Yes, yes you can. Other than shifting the power curve, that setup probably wouldn't even diminsh driveability (and many people are fine with less torque down low). I guarantee you it would still be more comfortable to drive than my Evo IX was when it was stock, and that was a full street car.
      1. Ak335i's Avatar
        Ak335i -
        Click here to enlarge Originally Posted by GetSomeE92 Click here to enlarge
        I was talking to one of the guys that works at the track in the tech line and he said there is a rule change on the horizon regarding cages. I believe he said that for cars made from 2008 and newer that the roll cage threshold will be moved to somewhere in the mid 10 second range. Not sure how credible his source was, but you should look into it before dumping the money on a roll cage if you end up not needing it.

        Thanks, good info. Im not going to do it until i get kicked out and told to. Click here to enlarge
      1. GeorgiaTech335Coupe's Avatar
        GeorgiaTech335Coupe -
        Click here to enlarge Originally Posted by GetSomeE92 Click here to enlarge
        I was talking to one of the guys that works at the track in the tech line and he said there is a rule change on the horizon regarding cages. I believe he said that for cars made from 2008 and newer that the roll cage threshold will be moved to somewhere in the mid 10 second range. Not sure how credible his source was, but you should look into it before dumping the money on a roll cage if you end up not needing it.
        That would be great news, as I fully intend to break 10s or break my car trying. Last thing I want is the extra weight of a roll cage.
      1. fast4door's Avatar
        fast4door -
        Click here to enlarge Originally Posted by RnmEvo9 Click here to enlarge
        ... gtr vs bbq ...Click here to enlarge

        Thanks again,
        Rnmevo

        lol
      1. BuraQ's Avatar
        BuraQ -
        Click here to enlarge Originally Posted by GetSomeE92 Click here to enlarge
        I was talking to one of the guys that works at the track in the tech line and he said there is a rule change on the horizon regarding cages. I believe he said that for cars made from 2008 and newer that the roll cage threshold will be moved to somewhere in the mid 10 second range. Not sure how credible his source was, but you should look into it before dumping the money on a roll cage if you end up not needing it.
        That sounds about right in light of the facts that GTRs, CTS-Vs, Z06s, Bugatti(s) etc that come out and run high 10s they are not banned from the track and are allowed to run multiple times
      1. fast4door's Avatar
        fast4door -
        so 10 pages later, and still no explantion except that its "fixed"...awesome..still think we got a troll here
      1. GetSomeE92's Avatar
        GetSomeE92 -
        Click here to enlarge Originally Posted by BuraQ Click here to enlarge
        That sounds about right in light of the facts that GTRs, CTS-Vs, Z06s, Bugatti(s) etc that come out and run high 10s they are not banned from the track and are allowed to run multiple times
        That's exactly what we were discussing as the likely motivation for the roll bar/cage rule change.
      1. 654's Avatar
        654 -
        Cool. This is great for the N54 platform!
      1. rick@defiv's Avatar
        rick@defiv -
        This is greatly interesting to me...Just based of of my experiences with higher boost I-6's, I'm curious what spark plug your running, heat range and MOST importantly gap setting. Sometimes(most times) it's too hot of a plug, the gap is too wide, etc. Granted they're not DI cars, most of the 2JZ hi-comp stuff i build needs 2 ranges colder,gaps vary from .020-.022,granted these cars are over 1000whp....but the principle is the same, cylinder pressure is cylinder pressure any way you slice it. Coils are the first victim when the volumetrics are vastly increased, I wonder if it's just blowing out the spark....even meth distribution could be a factor as well...too busy to read the 12 pages, just tossing in my two centsClick here to enlarge
      1. rick@defiv's Avatar
        rick@defiv -
        Click here to enlarge Originally Posted by GeorgiaTech335Coupe Click here to enlarge
        That would be great news, as I fully intend to break 10s or break my car trying. Last thing I want is the extra weight of a roll cage.
        4130 Chromoly not heavy,better for your chassis...and if your headed for the 10's you're gonna get booted w/o a cage. I see no such clauses in my 2012 NHRA rulebook...
      1. JStang's Avatar
        JStang -
        Per Shiv on E90post

        Looks like we found the problem. Well, actually one of our single turbo 6MT customers (tmo335tt) figured out last night. We don't want to say anything until it is tested and confirmed. But let's just say that this isn't related to the turbo kit or tune. But rather an issue that any 6MT that is making high power will experience.
      1. RTA's Avatar
        RTA -
        Seems the problem has been localized.... next days should bring some new info... Good for the platform! Seems to be high HP related and not the kit
      1. GeorgiaTech335Coupe's Avatar
        GeorgiaTech335Coupe -
        Click here to enlarge Originally Posted by rick@defiv Click here to enlarge
        This is greatly interesting to me...Just based of of my experiences with higher boost I-6's, I'm curious what spark plug your running, heat range and MOST importantly gap setting. Sometimes(most times) it's too hot of a plug, the gap is too wide, etc. Granted they're not DI cars, most of the 2JZ hi-comp stuff i build needs 2 ranges colder,gaps vary from .020-.022,granted these cars are over 1000whp....but the principle is the same, cylinder pressure is cylinder pressure any way you slice it. Coils are the first victim when the volumetrics are vastly increased, I wonder if it's just blowing out the spark....even meth distribution could be a factor as well...too busy to read the 12 pages, just tossing in my two centsClick here to enlarge
        It wasn't spark plug gap. Between the 3 of us, we tried everything from .017 to .024.
      1. BuraQ's Avatar
        BuraQ -
        Click here to enlarge Originally Posted by rick@defiv Click here to enlarge
        4130 Chromoly not heavy,better for your chassis...and if your headed for the 10's you're gonna get booted w/o a cage. I see no such clauses in my 2012 NHRA rulebook...
        Its not like that at PBIR....again they run GTRs, Stangs, CTS-Vs, etc back to back running 10s and they dont get booted. There is a different rule at this track. GeorgiaTech335Coupe will be fine when he makes 10s
      1. rick@defiv's Avatar
        rick@defiv -
        Click here to enlarge Originally Posted by GeorgiaTech335Coupe Click here to enlarge
        It wasn't spark plug gap. Between the 3 of us, we tried everything from .017 to .024.
        what coils? stock? and your just spraying straight meth into the charge pipe pre t/b w stock DI?
      1. rick@defiv's Avatar
        rick@defiv -
        Click here to enlarge Originally Posted by BuraQ Click here to enlarge
        Its not like that at PBIR....again they run GTRs, Stangs, CTS-Vs, etc back to back running 10s and they dont get booted. There is a different rule at this track
        Must be nice...they're rough around here...especially w the new 150mph 'chute clause.
      1. GeorgiaTech335Coupe's Avatar
        GeorgiaTech335Coupe -
        Click here to enlarge Originally Posted by rick@defiv Click here to enlarge
        what coils? stock? and your just spraying straight meth into the charge pipe pre t/b w stock DI?
        Stock coils, all brand new. But DZENNO ran the $1000 Okada coils and it didn't cure the problem.

        Meth is spraying in pre and post intercooler endtanks.

        I am 99% sure that tmo335tt found the solution. He has found some physical evidence on his car to back up the theoretical evidence he found. We will know soon enough if it works.