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Thread: Vishnu Single Turbo at PBIR - 12.50@121.6 having to shift all gears at 6300rpm

              
  1. #951
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    Better get in on that 90 day parts warranty then. Click here to enlarge

    What's your next opportunity at the track now that your car is in good health?
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    Click here to enlarge Originally Posted by GeorgiaTech335Coupe Click here to enlarge
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    New injector on cylinder 3 cleared up the issue. No more misfire and AFR and STFT look as they should.

    It's crazy that this injector went bad already. I had just replaced cylinder 3's injector at the end of September. Less than 3 months of service is terrible, especially for how expensive they are.
    Ugh! We need an upgrade coil option that isn't $1000+
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    Why doesn't someone experiment with coils from other models like other platforms do? are the coils on the S65 and the N63/S63 similar to the N54? one could just try to install one and see what happens. you wouldn't be out a bunch of money and who knows it could be a relatively cheap upgrade.

    Click here to enlarge Originally Posted by E90SoFlo Click here to enlarge
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    Ugh! We need an upgrade coil option that isn't $1000+
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    He said injector on cylinder 3, not coil.

    Having said that I have to say that my Okada coils along with the NGK 5992 plugs gapped seem to be very reliable. I haven't had to change either coils or plugs in a while now other than me pulling plugs to inspect them here and there. I have a feeling having a shorter gap on the plugs is making it easier on the ignition system overall and also making the system less prone to failure due to less ignition load. Maybe having NGK 5992 plugs gapped to 0.022" even with the stock coils would prove a nice "upgrade" to the ignition system in the sense that it'd reduce coil failure rates. Just a thought..
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    If someone could find a sure-fire way to recondition an injector, they'd probably make a lot of money...at least from me lol.

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    Click here to enlarge Originally Posted by whoosh Click here to enlarge
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    Better get in on that 90 day parts warranty then. Click here to enlarge

    What's your next opportunity at the track now that your car is in good health?
    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?

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    Yes, get some 60-130 runs ASAP! I want to see what these single cars can really do.
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    Click here to enlarge Originally Posted by GeorgiaTech335Coupe Click here to enlarge
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    Maybe some 60-130 runs to hold me over?
    +1

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    Click here to enlarge Originally Posted by GeorgiaTech335Coupe Click here to enlarge
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    Maybe some 60-130 runs to hold me over?
    obviously, since Mexico is closer to your house than PBIR. Click here to enlarge
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    60-130 is a great way to enjoy the car as your new power curve is very well suited for it being a manual. Click here to enlarge Full weight with race gas, max boost, etc, I think a good target for you is 6.9s on a 1.5% or lower grade.
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    Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
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    60-130 is a great way to enjoy the car as your new power curve is very well suited for it being a manual. Click here to enlarge Full weight with race gas, max boost, etc, I think a good target for you is 6.9s on a 1.5% or lower grade.
    If he goes with 26" tires in the rear, that I think he had mentioned before, and uses a 3.46 it'd be even better. 3.08 doesn't provide the same acceleration as a 3.46 diff and this puts the advantage to the 6AT cars when it comes to pure acceleration/speed type tests such as the 60-130 times..the only thing hurting a 3.46 is if you run a smaller diameter tire that'll require a shift into 5th

    If I wasn't going to hit the strip ever again and focus in on 60-130 entirely my car would have a 3.46 in it long time ago
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    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?
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    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
    Last edited by dzenno@PTF; 01-03-2013 at 02:56 PM.
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    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.
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  16. #965
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    Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
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    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
    Last edited by dzenno@PTF; 01-03-2013 at 03:08 PM.
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    Click here to enlarge Originally Posted by E90SoFlo Click here to enlarge
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    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.

  18. #967
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    Click here to enlarge Originally Posted by chrisisnapping Click here to enlarge
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    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..
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    Click here to enlarge Originally Posted by dzenno@ProTUNING Freaks Click here to enlarge
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    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
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    Click here to enlarge Originally Posted by GeorgiaTech335Coupe Click here to enlarge
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    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?

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    Click here to enlarge Originally Posted by 654 Click here to enlarge
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    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.

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    Click here to enlarge Originally Posted by nafoo Click here to enlarge
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    Yes
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    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!

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    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
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    Click here to enlarge Originally Posted by BEAR-AvHistory Click here to enlarge
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    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.
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    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)" ?

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