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    • Renntech updated BMW Diesel tune for E90 335d and E70 X5 xDrive3d M57 turbo six-cylinder + 57 wheel horsepower dyno

      Renntech released their Diesel software for the E90 BMW 335d as well as the E70 X5 xDrive35d both equipped with the turbo M57 diesel six-cylinder motor. Renntech provided BimmerBoost with their dyno runs and the highest baseline was chosen to display on the graph along with the peak tuned figures in SAE correction. Renntech claims gains of up to 65 crank horsepower and 54 crank pound-feet of torque.

      The dynojet results gains of 57 wheel horsepower and 33 pound-feet of torque from the higher baseline backing up Renntech's claims. The software retails for $1200. Very nice done Renntech.



      This article was originally published in forum thread: Renntech updated BMW Diesel, E90 335d and E70 X5 xDrive3d M57 turbocharged six cylinder, available + 57 wheel horsepower dyno started by Sticky View original post
      Comments 64 Comments
      1. Sticky's Avatar
        Sticky -
        Water meth on the diesel, interesting, haven't really seen anyone do it.
      1. FormerRotor's Avatar
        FormerRotor -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Water meth on the diesel, interesting, haven't really seen anyone do it.
        Its extremely common in the truck scene as the diesels tend to react very well to it, and there are a few folks running a setup on the 3er (TDIwyse did a custom setup and now BMS has started to offer their WW kit to the diesel crowd). Almost every oneof the truck folks i associate with are running either a performance or mpg tune in combo with Snow Performance's mpg max kit (which is adding power & efficiency to their tune and cleaning their engine to boot). Molecularly speaking, water is carbon buildups worst enemy which is another reason why I find the option so appealing.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by FormerRotor Click here to enlarge
        Its extremely common in the truck scene as the diesels tend to react very well to it, and there are a few folks running a setup on the 3er (TDIwyse did a custom setup and now BMS has started to offer their WW kit to the diesel crowd). Almost every oneof the truck folks i associate with are running either a performance or mpg tune in combo with Snow Performance's mpg max kit (which is adding power & efficiency to their tune and cleaning their engine to boot). Molecularly speaking, water is carbon buildups worst enemy which is another reason why I find the option so appealing.
        Then I'm surprised nobody is trying it with these BMW motors.
      1. FormerRotor's Avatar
        FormerRotor -
        AFAIK it's only Ron1n (who acted as Burger's guinea pig for the BMS WW kit) and TDIwyse (custom setup using a combo of a custom programmed JBD, Evolve Tune, and an off the shelf meth controller plugged in to MAP). I don't know of anyone running meth in conjunction with the RENNtech tune, though, and I think anyone taking it on now still qualifies as either a frontierman or at least an early adopter Click here to enlarge

        My guess is that the RENNtech with meth would produce similar results to TDIs setup (with which he was running 12.6s on standard tires). If only we could get a good DPF delete tune stateside, we may be able to push beyond this.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by FormerRotor Click here to enlarge
        with which he was running 12.6s on standard tires
        12.6?
      1. FormerRotor's Avatar
        FormerRotor -
        ...Sorry, in a 1/4. This is the best time I know of out of the 335d so far.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by FormerRotor Click here to enlarge
        ...Sorry, in a 1/4. This is the best time I know of out of the 335d so far.
        No that's incredible just looking for more details.
      1. FormerRotor's Avatar
        FormerRotor -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        No that's incredible just looking for more details.
        Heres some info from one of his posts in October 2012 (not to thread jack)...
        Click here to enlarge Originally Posted by TDIwyse Click here to enlarge
        Well, that car has an Evolve remap, stacked with a customized JBD that progressively adds pwr based on rpm, and H2O/methanol injection at ~650 ml/min (based on AEM flow gauge data) at max boost. But the IC is stock. The H2O injection pulls intake temps down below ambient temps even on hot summer days on multiple pulls based on Bavarian Technic logged data.


        The progressive JBD mod is key to keeping torque levels below the rated capacity of the transmission. It's only adding in pwr after the remap torque curve is starting to fall off. It's below the stock "0" setting until ~2500rpm and peaks at ~90-95% at 4400rpm. Makes for a nice, broad torque curve. It's also nice because the rail pressure distortion is at near stock levels during the rpm's where the ECU's injector calibration adaptation routine occurs.


        The remap also increases boost for better utilization of the extra fuel (less soot formation and loading of the DPF), and the H2O injection reduces peak cylinder pressures and NoX formation, as well as further reduces soot formation (based on published papers).


        It's been a good combo over the last several months which gives good performance and efficiency with little fuss. And it doesn't use much H20/methanol (fill the washer fluid resevoir about once every 1-2 months). Largely because it doesn't use much boost unless you get on it, and then you're speeding before you know it . . .

        Click here to enlarge Originally Posted by TDIwyse Click here to enlarge
        Forgot . . . the reason the JBD can be stacked with the Evolve remap is due to the remap not touching the rail pressure. This was verified with BT logged data before messing with the JBD.
        ...and I was actually wrong about the tires, he was running Hoosiers at the time (245).

        im thinking similar result might be able to be obtained with the RENNtech tune + meth.
      1. Puerto Rican 335d's Avatar
        Puerto Rican 335d -
        FormerRotor welcome to this site!!!
      1. FormerRotor's Avatar
        FormerRotor -
        Thanks, bud. I've been around...just not posting Click here to enlarge
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by FormerRotor Click here to enlarge
        ...and I was actually wrong about the tires, he was running Hoosiers at the time (245).

        im thinking similar result might be able to be obtained with the RENNtech tune + meth.
        He ever post a slip?
      1. m54b25's Avatar
        m54b25 -
        Click here to enlarge Originally Posted by FormerRotor Click here to enlarge
        AFAIK it's only Ron1n (who acted as Burger's guinea pig for the BMS WW kit) and TDIwyse (custom setup using a combo of a custom programmed JBD, Evolve Tune, and an off the shelf meth controller plugged in to MAP). I don't know of anyone running meth in conjunction with the RENNtech tune, though, and I think anyone taking it on now still qualifies as either a frontierman or at least an early adopter Click here to enlarge

        My guess is that the RENNtech with meth would produce similar results to TDIs setup (with which he was running 12.6s on standard tires). If only we could get a good DPF delete tune stateside, we may be able to push beyond this.
        I would go for clean LPG injection for the 35d engine instead unhealthy meth =) But, since Diesel emission removal it's not in any of my priority for street legal diesel tuning. I would like to see anyone else challenge any legal CARB, EPA or Euro emissions watchdogs for a quick buck.

        I am all for greater power output & lower emissions!
      1. FormerRotor's Avatar
        FormerRotor -
        @Sticky , He did. Are we good to post links to other forums here? I know some other places are particular about that.

        @m54b25, is meth not street legal? Would any adjustments need to be made to the diesel tune from Renntech in order to run it efficiently with water/meth injection?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by FormerRotor Click here to enlarge
        He did. Are we good to post links to other forums here? I know some other places are particular about that.
        I mean I don't like it but go ahead.
      1. m54b25's Avatar
        m54b25 -
        Click here to enlarge Originally Posted by FormerRotor Click here to enlarge
        @Sticky , He did. Are we good to post links to other forums here? I know some other places are particular about that.

        @m54b25 , is meth not street legal? Would any adjustments need to be made to the diesel tune from Renntech in order to run it efficiently with water/meth injection?

        Methanol
        (CH3OH) it's not a healthy fuel. Running it on the street is illegal, as if it catches on fire. It can't been seen burning, which is a danger to public. Its illegal, and insurance would be void. Ask a few 335i owners. We've not tried this on 35d for liability & unsafe reasons.

        There's other type of safer clean fuels for tuning. like LPG can be used as an ancillary fuel & adds more power without polluting.
      1. FormerRotor's Avatar
        FormerRotor -
        Lets see if this works so I don't have to post the link...
        not my results, these are from TDIwyse on the other forum running above-listed setup. (The 12.69)
        Attachment 29344
      1. FormerRotor's Avatar
        FormerRotor -
        Click here to enlarge Originally Posted by m54b25 Click here to enlarge

        Methanol
        (CH3OH) it's not a healthy fuel. Running it on the street is illegal, as if it catches on fire. It can't been seen burning, which is a danger to public. Its illegal, and insurance would be void. Ask a few 335i owners. We've not tried this on 35d for liability & unsafe reasons.

        There's other type of safer clean fuels for tuning. like LPG can be used as an ancillary fuel & adds more power without polluting.
        With all due respect,though, i feel much more comfortable running meth on the street in an inflammable mixture with water (little more so than windshield wiper fluid) than I do running LPG...not to mention the fact that the atomized water will encapsulate carbon molecules and help with buildup. Interesting, though that you would prefer LPG. I do not initially think that is the right solution for me, but I will have to do more research on that end.

        Either way, I've always been very impressed by RENNtech's tuning practices and I think my diesel may very well have the RENNtech tune in the future.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by FormerRotor Click here to enlarge
        Lets see if this works so I don't have to post the link...
        not my results, these are from TDIwyse on the other forum running above-listed setup. (The 12.69)
        Attachment 29344
        12.6@109 without even the best 60 foot. That's freaking impressive in my book, wow.
      1. Puerto Rican 335d's Avatar
        Puerto Rican 335d -
        No bad for a HEAVY DIESEL car LOL, im impressed!! he needs an IC to help his turbos!!
      1. starrfyr's Avatar
        starrfyr -
        Click here to enlarge Originally Posted by Puerto Rican 335d Click here to enlarge
        hifiguy if youre a racer like me you will loose some MPGs currently Im getting anywhere from 22-23 mpg city and HOLD ON to this anywhere from 40-46 mpg hwy yes amigo you read that right BUT mind you i have the WAGNER IC which helps improve more cooler air to the turbos but if i did not have the WAGNER IC it would of been anywhere from 36-40 mpg hwy but same in the city as above give or take
        Hey PR ... Been a while. I'm glad that there's some solid data on the Renntech tune. We argued about that a while back. Click here to enlarge I see Wagner has finally released the IC. Just in time for me to pay off the lease this fall and then I can get one. Question ... I'm guessing the IC and tune play well together but since you've got both, maybe you can confirm it?

        Also, what's your opinion of stacking the JBD mod on top of the Renntech + Wagner IC with the JBD delayed until 2500 rpm to keep the trans from being torqued to death? Also, did you ever get the Quaife LSD, and if so, what do you think? At about 2-1/2 grand, as much as I'd like one, I think discretion is the better part of valor on that item.