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    • Vishnu Tuning E92 335i with FFTEC N54 single turbo hardware + raised boost finally runs a 10 second 1/4 mile pass, underwhelming?

      Vishnu Tuning finally managed to eek out a 10 second pass in their single turbo E92 335i that they were once touting would be in the 9's. After multiple unsuccessful attempts (with driver errors) from Vishnu owner Shiv Pathak he was able to get a high 10 second slip by raising the boost according to his data log and shifting cleanly. Details are scarce as Vishnu did not provide information on the youtube video upload and there also is no exterior view to show the slip actually correlates to the run shown in the video.

      We will give the benefit of the doubt here but with all secrecy and the multiple attempts to get to this point the performance is simply underwhelming for the time and money investment. The car is said to have run 10.8@131. It recently was dyno'd at 627 wheel horsepower by Insideline so these horses are not translating well to the ground. This single turbo offers considerable lag and the top end pull for the sacrifice simply is not there especially compared to existing solutions such as the Rob Beck twin turbo upgrade which offers far greater spool and performance only a few miles per off through the traps but with far greater driveability.

      The previous record was 11.10@127.21 with 19 psi of boost on the RB turbos. These turbos are a much more affordable option that also currently is available. Vishnu claims 23.5 psi of boost for this 10.8@131 mph run. Is it worth the minor top end benefit for the estimated $8500+ plus install? We do not think so and considering the way Vishnu hyped this the results are very underwhelming. The low end torque sacrifice is not being justified with a large top end gain.

      We wish Vishnu luck in the future but for now this is still an experiment and work in progress that is tough to buy both figuratively and literally. There are more affordable options that work better for daily driven N54 vehicles that offer 97% of the performance in practice (as in not just a dyno queen) with less compromises. Not to mention for users to repeat what Vishnu has done here with their own single turbo it will likely be far more difficult as they will not have the option of risking their engine with higher boost and timing advances simply to try to eek out a tenth to squeeze past what already exists and get into the 10's. It may be a record, but it certainly is not impressive considering where the bar was already set with far less horsepower and much more affordable tuning and hardware options.








      This article was originally published in forum thread: Vishnu/FFTEC 10.822 1/4 mile RECORD! started by onesuperboi View original post
      Comments 682 Comments
      1. Q4P's Avatar
        Q4P -
        Anyone know if they have fitted or tried anything with the largest/most powerful turbo option? I guess not since that will require Shiv testing and a built engine first...
      1. sniz's Avatar
        sniz -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I don't think I have ever seen a 100 whp disparity like that on a mustang versus dynojet at this power level.
        The CPE mustang dyno reads crazy low, a tuned GTR put down 385awhp for example. I dont know what it made on a dynojet but it was surely way more than that.
      1. Mr.Squeeze's Avatar
        Mr.Squeeze -
        Click here to enlarge Originally Posted by SlicktopTTZ Click here to enlarge
        Exactly, but some people were arguing that you can't on a Dynojet (which I find hard to believe). Dynojet can show uncorrected, STD or SAE numbers. Mustang Dynes are SAE corrected with a weather station hooked to the dyne and of course have a Power Absorption Unit to create a true load on the vehicle vs just spinning weight.

        STD:
        Air Temperature: 60F
        Absolute Pressure: 29.92 inches Hg
        Relative Humidity: 0%

        Relative Horsepower : 104.8%
        Air Density: 1.223kg/m3
        Relative Air Density: 99.8%
        Density Altitude: 67feet
        Virtual Temperature: 60F
        Vapor Pressure: 0 inches Hg
        Dyno Correction Factor: .955

        SAE:
        Air Temperature: 77F
        Absolute Pressure: 29.23 inches Hg
        Relative Humidity: 0%

        Relative Horsepower : 100%
        Air Density: 1.157kg/m3
        Relative Air Density: 94.4%
        Density Altitude: 1952feet
        Virtual Temperature: 77F
        Vapor Pressure: 0 inches Hg
        Dyno Correction Factor: 1



        Ok I will give you a example true life story that I saw with my own eye's, there is mustang dyno that reads high up here in the north east. I use to think they all read low (Mustangs) my self tell I started seeing 370z's with bolt on's making 340whp+. This made no sense to me because most 370'z's dyno 270's stock a Nismo 370 280's stock on dynojets. When Nismo 370 was N/A before is TT's he got tuned/dyno on this same mustang 344whp. I told him that dyno read high he would agrue that his number's were correct.We went to the track he ran about 4-5 run's all 13.4-13.5@105MPH he blamed the track.

        Anyway here is another 370z on that same dyno different track.


        http://www.dragtimes.com/2009-Nissan...phs-20889.html

        I asked my tuner who own's both by the way dynojet and a Mustang.He told me that a Mustang has a value that you can change to make it read higher or lower.It's a power/coast down procedure that you perform several times thats gives you a value.You have to take those values and average them out thats the value you are suppose. If you make the vaule higher in the coast down procedure it will read higher.


        Dynojets are all calibrated at the factory and the shipped out to the shops, this is why there the industry standard.
        (no adjustment parameters for the shops )

        Now as far as load control no doubt a Mustang is better.
      1. fundahl's Avatar
        fundahl -
        Yes, you can change your Parasitics Loss file. Hell, you don't even have to do that, there is a multiplier you can change. I'm saying, with the coast down test down properly, with the right (True) variables and the multiplier at 1.00, different Mustang Dynes will read very similar and realistic. Especially with weather correction assuming the weather station is working properly.
      1. BattaM3's Avatar
        BattaM3 -
        I've been on almost all dynos. The 2 mustangs dyno only read about 15-20rwhp less. Don't know where these people get there numbers from. Who cares about dyno numbers these days anyways.

        I only dyno for fun and to make sure everything is running proper. No way in hell DJs read 90rwhp more. Noob
      1. fundahl's Avatar
        fundahl -
        Click here to enlarge Originally Posted by BattaM3 Click here to enlarge
        I've been on almost all dynos. The 2 mustangs dyno only read about 15-20rwhp less. Don't know where these people get there numbers from. Who cares about dyno numbers these days anyways.

        I only dyno for fun and to make sure everything is running proper. No way in hell DJs read 90rwhp more. Noob
        A Dynojet could read about 90rwhp more at about 720whp vs a Mustang Dyne.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by SlicktopTTZ Click here to enlarge
        A Dynojet could read about 90rwhp more at about 720whp vs a Mustang Dyne.
        Playing this estimation game is pointless.
      1. fundahl's Avatar
        fundahl -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Playing this estimation game is pointless.
        Just wanted to make it clear that it is very possible to have a 90whp or greater difference between Dynojet and Mustang Dynamometer.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by SlicktopTTZ Click here to enlarge
        Just wanted to make it clear that it is very possible to have a 90whp or greater difference between Dynojet and Mustang Dynamometer.
        It's also possible for a mustang to read higher.
      1. fundahl's Avatar
        fundahl -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        It's also possible for a mustang to read higher.
        Possible, especially if it isn't setup properly. But normally the load-based chassis dynes will read lower than the inertia only chassis dynes.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by SlicktopTTZ Click here to enlarge
        Possible, especially if it isn't setup properly. But normally the load-based chassis dynes will read lower than the inertia only chassis dynes.
        Normally, yes.
      1. Mr.Squeeze's Avatar
        Mr.Squeeze -
        Click here to enlarge Originally Posted by SlicktopTTZ Click here to enlarge
        Possible, especially if it isn't setup properly. But normally the load-based chassis dynes will read lower than the inertia only chassis dynes.
        You can't say that when its up to the operator to decide how it reads . I gave you a example of one I know of two more that don't read higher than normal . I know you prefer a mustang and that fine ,but you seem to be blind that they can be manipulated .
      1. fundahl's Avatar
        fundahl -
        Click here to enlarge Originally Posted by Mr.Squeeze Click here to enlarge
        You can't say that when its up to the operator to decide how it reads . I gave you a example of one I know of two more that don't read higher than normal . I know you prefer a mustang and that fine ,but you seem to be blind that they can be manipulated .
        You seem to be blind in that I said that you CAN manipulate a Mustang Dyne. (I even talked about how to do it)

        I said a PROPERLY calibrated Mustang Dyne will read lower than a Dynojet. Meaning, the operator knows how to actually calibrate the load cell, make a Parasitics loss file, and leaves the multiplier at 1.00. Some people have a hard time grasping that, or feel that it reads low, when the reality shows that it accurately predicts 1/4 times and trap speed..... (Which you can't even do on a Dynojet)
      1. Mr.Squeeze's Avatar
        Mr.Squeeze -
        Click here to enlarge Originally Posted by SlicktopTTZ Click here to enlarge
        You seem to be blind in that I said that you CAN manipulate a Mustang Dyne. (I even talked about how to do it)

        I said a PROPERLY calibrated Mustang Dyne will read lower than a Dynojet. Meaning, the operator knows how to actually calibrate the load cell, make a Parasitics loss file, and leaves the multiplier at 1.00. Some people have a hard time grasping that, or feel that it reads low, when the reality shows that it accurately predicts 1/4 times and trap speed..... (Which you can't even do on a Dynojet)

        You were the one that said a few post up that normally the load-based chassis dynes will read lower.

        ^^^ How can you say that when they can be manipulated, like I said before I know of 3 of them in a 50 mile radius that do not read lower than a dynojet.

        Everything that your saying about a mustang dyno is a if its set up right. There is a reason dynojets are the industry standard. The only thing you can do is change the correction factor.

        In the end a dyno is just a tuning tool ,and you love Mustang dyno's very clear on that.
      1. amclint's Avatar
        amclint -
        I don't care about Mustang vs Dynojet, but I do think it's awesome you can do a simulated 1/4 mile run on a mustang, that's just awesome.
      1. Terry@BMS's Avatar
        Terry@BMS -
        Mustang dynos are nice for tuning on. And good for marketing a too-large turbo as you can bump up load higher than you'd see on the road to improve spool speed. Click here to enlarge But dynojets are the Internet gold standard because even with their various flaws they tend to be the most consistent from dyno to dyno and day to day.
      1. GeorgiaTech335Coupe's Avatar
        GeorgiaTech335Coupe -
        Click here to enlarge Originally Posted by amclint Click here to enlarge
        I don't care about Mustang vs Dynojet, but I do think it's awesome you can do a simulated 1/4 mile run on a mustang, that's just awesome.
        It is a really cool feature. And pretty darn accurate to boot.
      1. LostMarine's Avatar
        LostMarine -
        Click here to enlarge Originally Posted by GeorgiaTech335Coupe Click here to enlarge
        It is a really cool feature. And pretty darn accurate to boot.
        so what did it run in the 1/4 on the dyne?
      1. GeorgiaTech335Coupe's Avatar
        GeorgiaTech335Coupe -
        Click here to enlarge Originally Posted by LostMarine Click here to enlarge
        so what did it run in the 1/4 on the dyne?
        I don't think they did that, and I'm not 100% that all Mustang dynos have that capability. I just know from the brand new one that my friend bought a couple years back (2009?) that when we used the feature and it was pretty damn close to our times at the strip.

        It seems pretty hard on the car though since you are pulling through the gears with very little air flow. We got a lot of coolant temp warnings.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by LostMarine Click here to enlarge
        so what did it run in the 1/4 on the dyne?
        The times are honestly way off from reality.