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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. Terry@BMS's Avatar
        Terry@BMS -
        Too lazy to do the math. With a 7200rpm redline using 26.5" diameter tires (e.g. normal hoosiers) and a 3.46 rear how fast can you go in 4th? 135mph?
      1. dzenno@PTF's Avatar
        dzenno@PTF -
        138mph@7200rpm on a 6MT transmission 335i with 3.46 gears and a 26.5" tire in 4th gear
        135mph@7200rpm on a 6MT transmission 335i with 3.46 gears and a 26.0" tire in 4th gear

        EDIT: In fact, with a 3.46 on a 6MT you don't need larger than a 25" tire to hit 130mph in 4th:

        130mph@7200rpm on a 6MT transmission 335i with 3.46 gears and a 25.0" tire in 4th gear

        For a more concrete example, on Hoosier DRs (DOT approved lol) 275/40/17 which fits all 335s out there that I know and on some nice lightweight rims such as Apex ARC-8 17x9 or Kosei K1s, it'd be a perfect combo:

        133mph@7200rpm on a 6MT transmission 335i with 3.46 gears in 4th gear (Hoosier DR height is 25.66")

        Courtesy of a very nifty Gear Calc utility for windows, link here:

        http://www.locost7.info/gearcalc.php
      1. Terry@BMS's Avatar
        Terry@BMS -
        So one of you are realistically going to go faster than 135mph right? 3.46 sounds like the perfect gearing for 1/4 mile and 60-130.
      1. dzenno@PTF's Avatar
        dzenno@PTF -
        Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
        So one of you are realistically going to go faster than 135mph right? 3.46 sounds like the perfect gearing for 1/4 mile and 60-130.
        Unfortunately at the 1/4 the 3.46 will be a pain unless running slicks...way too much gear for a 6MT, even 3.08 is too much to launch...60-130 though with a 3.46 I could go probably about 0.4-0.5 faster

        EDIT: Discussing with @DefactoM6, great point he brought up actually. The faster the car's acceleration the taller the tire will be required to reach the same speeds at a given RPM. In other words, the above calcs are just that, calculations/approximations, but from what I've seen on my car and changing gear ratios its pretty close..not exact numbers for sure
      1. chrisisnapping's Avatar
        chrisisnapping -
        Click here to enlarge Originally Posted by E90SoFlo Click here to enlarge
        Ugh! We need an upgrade coil option that isn't $1000+
        DAMN that's just downright prison rape.

        I feel very fortunate that I can use the Audi R8 coils on my engine, at a whopping $16 a piece.
      1. dzenno@PTF's Avatar
        dzenno@PTF -
        Click here to enlarge Originally Posted by chrisisnapping Click here to enlarge
        DAMN that's just downright prison rape.

        I feel very fortunate that I can use the Audi R8 coils on my engine, at a whopping $16 a piece.
        OEM coil is $48 from Tischer...not a big deal guys Click here to enlarge

        I think more people should jump the bandwagon to the NGK 5992 plugs with a shorter gap to give them a bit more life and give the overall ignition system a bit of a break at higher power levels...the stock gap at high boost/ignition levels the car is exposed to with meth/E85/race gas is probably putting the ignition system into overdrive making the coils go much sooner than they would otherwise..
      1. nafoo's Avatar
        nafoo -
        Click here to enlarge Originally Posted by dzenno@ProTUNING Freaks Click here to enlarge
        OEM coil is $48 from Tischer...not a big deal guys Click here to enlarge

        I think more people should jump the bandwagon to the NGK 5992 plugs with a shorter gap to give them a bit more life and give the overall ignition system a bit of a break at higher power levels...the stock gap at high boost/ignition levels the car is exposed to with meth/E85/race gas is probably putting the ignition system into overdrive making the coils go much sooner than they would otherwise..
        Are these the ones you have? http://www.sparkplugauto.com/ngk/las...park-plug.html
      1. 654's Avatar
        654 -
        Click here to enlarge Originally Posted by GeorgiaTech335Coupe Click here to enlarge
        My local track is "closed for good", but I'm pretty sure they are reopening in March. There is an event down at PBIR on the 27th, I may do that but it's a drive for me.

        Maybe some 60-130 runs to hold me over?
        Do you have 3.08 or 3.46?
      1. GeorgiaTech335Coupe's Avatar
        GeorgiaTech335Coupe -
        Click here to enlarge Originally Posted by 654 Click here to enlarge
        Do you have 3.08 or 3.46?
        3.08 rear end with a 25.9" tall tire. That means 3rd goes to 114 on the dot, and 4th goes to ~151mph!!!

        Not the greatest for 60-130. I want to go with a shorter gear in the rear end, but not sure I want to go to 3.46. Makes the M3 rear ends very attractive.
      1. dzenno@PTF's Avatar
        dzenno@PTF -
        Click here to enlarge Originally Posted by nafoo Click here to enlarge
        Yes
      1. Aced16's Avatar
        Aced16 -
        DZENNO Can you possible provide a little more data on the plugs? I will be changing my plugs soon, and while not at a high HP rating, would like to know if there would be a benefit for those of use with minor mods as well. I plan on picking up a Cobb AP here in the next month with an FMIC and getting PFT tuned. Thank you!
      1. dzenno@PTF's Avatar
        dzenno@PTF -
        TBH i don't see a negative to using them and since you can gap them easily and take some load off your ignition system and run 1 heat range colder than stock it'd be a no brainer to me
      1. mithiral67's Avatar
        mithiral67 -
        Click here to enlarge Originally Posted by BEAR-AvHistory Click here to enlarge
        After break-in pure stock with run flats I had real bad wheel hop the first time I ever launched in 1st from a standing start. I have never driven a performance car including IRS versions this sensitive to wheel hop right out of the box.
        Same, my IS wheel hopped in stock form. New rims and wheels corrected this.
      1. LostMarine's Avatar
        LostMarine -
        sooo.. are we ever gonna see some real feedback now, since its been a flywheel issue and all. or is everyone still "too busy out and enjoying their cars.. (but under 1k miles then selling)" ?
      1. BuraQ's Avatar
        BuraQ -
        Click here to enlarge Originally Posted by rudypoochris Click here to enlarge
        Its weird. I don't have any wheel hop at all. I don't get it. The only mod I have is a rear sway bar and 275mm nonrfts. I mean, I'm glad I don't, but I can't figure out why others do.
        Do you have a 335is ?
      1. rudypoochris's Avatar
        rudypoochris -
        Click here to enlarge Originally Posted by BuraQ Click here to enlarge
        Do you have a 335is ?
        No, 2008 E92 with sway bars and stock sport suspension. Open diff, Morr VS8, and Michelin PSS at 275/30/19.
      1. ChuckD05's Avatar
        ChuckD05 -
        i havent experienced any either in my 09 e92... pre and post eibach springs, which def hurt my hooking ability... cant wait to go to adjustable dampers/coils
      1. Q4P's Avatar
        Q4P -
        any 11 second cars yet? lol
      1. LostMarine's Avatar
        LostMarine -
        Click here to enlarge Originally Posted by Q4P Click here to enlarge
        any 11 second cars yet? lol
        nah bra, they skipped 11's and went 9's..
      1. Q4P's Avatar
        Q4P -
        Click here to enlarge Originally Posted by LostMarine Click here to enlarge
        nah bra, they skipped 11's and went 9's..
        damn... modern day 2JZ... no $#@!