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Thread: 07 BMW 335i Twin Turbo Dyno

  1. #1
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    Default 07 BMW 335i Twin Turbo Dyno

    http://www.automobilemag.com/feature...i_dynamometer/

    The 2007 BMW 335i will be in showrooms next month, and is the first application of BMW’s new twin-turbocharged 3.0-liter inline-six.

    This is one hell of a motor, pulling smoothly and strongly from idle all the way to its 7000-rpm fuel cutoff. There’s no boost gauge, and since you barely hear the turbos spooling, it’s easy to forget they’re even there. Once you’ve adjusted to the slight lag in power delivery following big, sudden throttle openings, all you notice is the sound of that silky in-line six.


    BMW says that this engine makes 300 horsepower and 300 lb-ft of torque.

    We used a DynoJet chassis dyno, which measures an engine’s power output at a vehicle’s rear wheels. Because of frictional driveline losses, this number is always lower--generally by fifteen to twenty percent--than the quoted power output from the manufacturer, which is measured at the engine itself.


    Here’s what we found:


    The non-turbocharged 330i, rated by BMW at 255 hp and 220 lb-ft of torque, puts about 200 hp and 180 lb-ft to the rear wheels. That’s roughly a twenty-percent loss. Since they have similar drivelines, you’d expect the 335i to put down 235 hp and 250 lb-ft.

    But it didn’t. It put down a whole lot more: 275 hp and 300 lb-ft. A few quick taps on our trusty calculator shows that this engine is likely putting out closer to 350 hp and 360 lb-ft of torque.
    RacePrecision GotApex

    "Be ashamed to die until you have won some victory for humanity." ~ Horace Mann

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    On the Nurburgring:

    http://bmwblog.net/?p=210

    The new bi-turbo 3 series coupe shows some impresive numbers on Nurburgring. Here is a scan from the german magazine Sport Auto:
    Laptime Nordschleife 8.26 min (4 seconds slower than M3)
    Laptime Hockenheim 1.17,8 min (0,8 seconds faster than C55 and 1.5 seconds slower than M3)
    0-100km/h 5.6 sec
    0-200km/h 20,7 sec
    36m slalom: 130km/h (M3 123km/h, C55 122km/h)
    110m change lane: 136km/h (M6 137km/h, M3 136km/h, C55 134km/h)
    Wet track: 1.36,8 min (M5 E60 1.36, 7min)
    G-powers: 1.15g (C55, 1,10g and M3 1.10g)
    RacePrecision GotApex

    "Be ashamed to die until you have won some victory for humanity." ~ Horace Mann

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    More:

    http://www.e90post.com/forums/showthread.php?t=30140

    here are other hockenheim laptimes done by sportauto

    Audi RS6 -------------------------------------------------- 1.17,6 min
    BMW M5 E39 ------------------------------------------------ 1.17,6 min
    Aston Martin DB9 ----------------------------------------- 1.17,7 min
    Mercedes SLK55 (tested a second time) ---------------- 1.17,7 min
    BMW 335i ---------------------------------------- 1.17,8 min
    BMW Z4 3.0 Coupé ---------------------------------------- 1.17,8 min
    Mercedes CLS 55 ---------------------------------------- 1.17,8 min
    Subaru Impreza WRX STi (265hp) ----------------------- 1.17,9 min
    Mercedes E55 (476hp) ------------------------------------ 1.18,0 min
    Mercedes SL 500 ------------------------------------------ 1.18,1 min
    BMW Z4 3.0 SMG (231hp) --------------------------------- 1.18,1 min
    Bentley Continental MTM ---------------------------------------- 1.18,1 min
    Audi S4 Sedan (V8) ---------------------------------------- 1.18,1 min
    Audi RS4 (old) --------------------------------------------- 1.18,2 min
    Mitsubishi EVO 7 -------------------------------------------- 1.18,2 min
    BMW Z3M Roadster ---------------------------------------- 1.18,2 min
    Mercedes SL 55 ------------------------------------------ 1.18,4 min
    Mercedes CLK 63 ---------------------------------------- 1.18,4 min
    Mitsubishi EVO 6 -------------------------------------------- 1.18,4 min
    Maserati 3200 GT ------------------------------------------- 1.18,4 min
    Mercedes CL 65 ---------------------------------------------- 1.18,4 min
    Mercedes SLK 32 ------------------------------------------- 1.18,5 min
    Mercedes C55 --------------------------------------------- 1.18,6 min
    Mercedes SLK 350 ----------------------------------- 1.18,7 min
    Nissan 350Z ------------------------------------------------ 1.18,8 min
    Audi S6 (435hp) --------------------------------------------- 1.18,8 min
    RacePrecision GotApex

    "Be ashamed to die until you have won some victory for humanity." ~ Horace Mann

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    Wow, impressive stuff. Can't wait till the new V8 M3 comes out!
    S54 M Coupe Pheonix Yellow/Black (rare bird)
    S52 M Coupe Estoril/Estoril (show queen)
    E60 M5 Dinan S3R Stroker (family hauler)
    997.1TT RST600 (Beast)

    gone, but not forgotten...
    #160 M400 Troy Tuned - Red Mica - (RCKT PWR)

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    Vishnu's initial efforts at dyno tuning:

    http://www.e90post.com/forums/showthread.php?t=30027

    Results:

    The gains were greatest at higher engine speeds. At 7000rpm, it picked up nearly 70whp with richer-than-stock A/F ratio. Peak WHP increased from 278 to 310whp at 6000rpm. Torque from 288lb-ft to 311lb-ft. I stayed nice and conservative at low to mid engine speeds (where, quite frankly, we should see the biggest gains when all is said and done). This was because I don't yet have control of the AFR targets in this region. The stock fuel mapping is too lean to run either the extra boost the turbos most certainly are capable of supporting, or optimal spark advance. Once we get control of the fuel in this region, we can start to turn up the wick and really get the sick midrange torque than the hardware is capable of supporting. For now, all we really wanted to do is make the car charge to redline instead of fall flat above 6000rpm. We did a little more than that but that was just an unexpected bonus. More to come in the next few weeks. Until then, it's back to testing.

    Stock vs. First Attempt at tuning (whp and torque)
    Bone Stock: Runs 2 and 3
    "Tooned": Runs 15 and 16
    91oct CA gas
    Take 2:

    http://www.e90post.com/forums/showthread.php?t=31110
    RacePrecision GotApex

    "Be ashamed to die until you have won some victory for humanity." ~ Horace Mann

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    Newest:

    Stock dyno: 265 WHP / 286 lbs.-ft. TQ
    Xede dyno: 322WHP / 378 lb.-ft. TQ, + 57WHP / +92 TQ

    http://www.e90post.com/forums/showthread.php?t=40161
    RacePrecision GotApex

    "Be ashamed to die until you have won some victory for humanity." ~ Horace Mann

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    Quote Originally Posted by OnyxM400
    Newest:

    Stock dyno: 265 WHP / 286 lbs.-ft. TQ
    Xede dyno: 322WHP / 378 lb.-ft. TQ, + 57WHP / +92 TQ

    http://www.e90post.com/forums/showthread.php?t=40161
    I drove the car last month at MPG Track Test Day. Nice, powerful, and one of the better cars that I drove on the big Willow Springs Track. Very strong, and I think better than the old M3 I6.
    Very impressive.

    I can tell you that the new M3 is MUCH QUICKER.

    I have found that at the 300 Hp level, Dynojets and other single roller dynos have about a 50 HP error to the high side.

    For tuning purposes, the dyno does indicate if there is any improvement. However, all of the dynos are different, and the numbers are all over the map. My local shop has an eddy current damped Superflow, and they get the lowest dyno numbers most of the time. However, the cars run at the strip right on time and speed.

    In any case, the engine is producing about the advertised HP. Mess with the map and it makes more. The Vishnu guys are pretty good.

    A real test would be to take the car to the drag strip and make a run, concentrating on speed rather than ET. Using the weight of the car and the speed, an accurate HP number can be determined.

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    Vishnu's latest:

    http://www.e90post.com/forums/showthread.php?t=65548

    And the results on 93oct with our exhaust system:
    (same day, same dyno, within a 15 minute period)

    Stock (just exhaust, no PROcede) 289whp 299lbft
    with PROcede v1.45 332whp 380lbft
    with PROcede v2.0beta 376whp 406lbft

    v2.0beta gains over stock ECU: 87whp 107lbft
    v2.0beta gains over v1.45: 42whp 26lbft

    v2.0beta gains over a totally stock car (estimated): 100whp 126lbft

    Dyno Graph:
    Stock ECU vs. v1.45 vs. v2.0beta
    WHP and Torque
    RacePrecision GotApex

    "Be ashamed to die until you have won some victory for humanity." ~ Horace Mann

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    First downpipes out:

    http://www.e90post.com/forums/showthread.php?p=1127312

    Specs:
    -Catless... These Downpipes REMOVE FACTORY CATS
    -304 Stainless Steal
    -Complete Mandrel Bend piping throughout downpipe
    -3inch diameter Piping which tappers to 2.75inch at the end and has machined welded 2.5 universal flange to bolt to the stock/aftermarket exhaust systems.
    -3 inch machined welded laser cut flanges to bolt to stock turbo and utilize stock band.
    -Machine welded 02 sensor bungs for both pre and post 02 sensors
    -3rd machine welded 02 sensor bung for anyone that would like to run a wide band...there is a bolt that plugs this if you do not want to use the 3rd bung.

    Answers to questions that I know will come up... That I can help with
    Is there a Check Engine Light?.... NO! Weeks of testing and no check engine light, both with and without PROcede.

    Does 3 inch fit? Yes, we have successfully made 3 inches fit with no rubbing, touching, etc. Clearance is perfect, and to be honest there is more room now than there was with stock (having their bends and cats)! Also keep in mind at the end of the downpipe they tapper to 2.75 inches for perfect fitment to stock exhaust system

    And the Real Question!!!
    HOW MUCH POWER DO THEY MAKE OVER STOCK!?? Well this is the exciting part!

    Here are all the Details on Before and After Dyno with just our first set prototype downpipes.

    STOCK car STOCK DOWNPIPES secondary cats removed.
    I DYNO my car STOCK with ZERO modifications on a DYNOJET.
    Run Conditions: 69.9F Humidity: 42%
    SAE with 1.0 CF and smoothing 5
    76 pump gas
    Max Power: 269.74 WHP
    Max Torque: 279.33WTQ

    STOCK car with Riss Racing 3inch Downpipes and NO PROCEDE on DYNOJET... We wanted to show true gains over stock!
    Run Conditions: 89.4F Humidity: 26%
    SAE with 1.0 CF and smoothing 5
    76 pump gas
    Max Power: 296.94- 26.7 Wheel HP increase OVER STOCK!
    Max Torque: 328.68- 49.3 Wheel TQ increase OVER STOCK!

    Again this is without PROcede or any other "chip".
    RacePrecision GotApex

    "Be ashamed to die until you have won some victory for humanity." ~ Horace Mann

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    FYI, they started welding the ring gears on the diffs, to keep people from using aftermarket LSD units:

    http://www.e90post.com/forums/showth...187#post996187

    Quaife ATB on the left, original diff on the right:



    RacePrecision GotApex

    "Be ashamed to die until you have won some victory for humanity." ~ Horace Mann

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