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Thread: Live mapping 850CSi

  1. #101
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    1994 850csi rhd
    Yes its very fast!!!

  2. #102
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    '92 BMW 850 Csi
    I'm following this thread with great interest. Not so many (good) mapping options available for the CSI. Hope you finally succeed.

  3. #103
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    Hopefully I should get some time to test again on the dyno. I still think going back to OEM spec exhaust but without CATs would be the best option but will wait and see how it goes.

    For those of you interested in the technical side of chip programming, here is a quick how to:

    First you need the correct size/speed EPROMs and an EPROM eraser. The eraser uses ultraviolet light to set the chip back to its blank state.







    Stick the chips into the eraser and cook for 20 minutes some chips take longer than others
    to blank, some may not blank at all. If they don't blank then they are junk.



    Then you need an EPROM programmer. These can be picked up for a very reasonable price on eBay



    Open the software and select the chip type, making sure you have the correct programming voltage...check data sheets online.

    Once you have that done, select the file you want to burn to the EPROM. Make sure you tick the .bin file as type or it won't load.

    Once the EPROMs are ready for programming, place them in the programmer (one at a time ) . Try reading first to make sure the EPROM is blank all the way through. Sometimes you get the odd stuck bit, if you do, erase it for another 15 minutes and try agin.

    Once it's blank and you have your tuned.bin file loaded, hit program and wait for it to burn. It doesn't take long. Once burned verify the checksum is the same as the file you have loaded. If for some reason the checksums don't match, try running the program step again until it matches. If the USB voltage is low it can take a few attempts to burn.

    That's it ! Stick the EPROM back in the DME and you're ready to go
    Last edited by Omega man 1969; 10-28-2012 at 11:51 AM. Reason: Automerged Doublepost

  4. #104
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    any update?

  5. #105
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    Emulators unplugged and tuned chips installed. Running very well. I'm looking for a standard CSi exhaust system so that I can Make a comparison run on the dyno.

  6. #106
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    Sounds good. Its going to be hard to find a used OEM exhaust system.

  7. #107
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    Yes it is. I would really like to see a figure for a stock setup to compare. Will try and get the current setup tested this week

    I want to try stock size pipe, resonator fitted but with straight through back boxes.....I think that will give the best results.
    Last edited by Omega man 1969; 11-05-2012 at 09:28 AM.

  8. #108
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    I remember when the K55 was launched.. that car was LIVE mapping ,, and as adverticedn,, the high numbers was meant to be ,, as the mapping was live ,, and not on dyno
    Sveinbjörn Hrafnsson

    E30 CABRIO V12 M70B50 ///
    ALPINA B10 BITURBO 346 @ 507
    E34 550 V12 JML
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  9. #109
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    Quote Originally Posted by B10 BITURBO View Post
    I remember when the K55 was launched.. that car was LIVE mapping ,, and as adverticedn,, the high numbers was meant to be ,, as the mapping was live ,, and not on dyno

    Sorry, I don't understand your statement. Live tuning has been done on the road not the dyno. If you are comparing a company with large amounts of cash to a " home" tuner then there is no comparison.

    Looking at the k55 details I see this :


    However, there is no verification of 475 hp (354 kW) produced by this car by Racing Dynamics. The K55 produces 380 hp (280 kW) and 405 ft·lbf (549 N·m) of torque as listed in the 02/1994 Euro car magazine. Racing Dynamic's own website lists the K55 at 401 hp (299 kW).[13]

  10. #110
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    '94 BMW 850 CiA
    Was just thinking about this.. Have you considered trying to create a tune for E85? AFR = 9.76 stoich (part throttle, up to 11.6 at WOT) and you can get away with some pretty aggressive timing..!

    EDIT: Wait.. you don't have E85 in the UK?
    Last edited by 4drian; 11-08-2012 at 06:47 AM.
    Current Cars:
    1994 BMW 850 CiA (2017 km). My black on black Wokke'd 5.4l V12 autobahnmuncher
    1992 Donkervoort S8AT (105k km). The mad dutch "Super 7." 300hp/ton of turbo power!
    2013 VW Caravelle 4Motion (57k km). A dark wine red 180PS/400Nm 2.0 BiTDI rocketvan
    2007 SMC F-Kart 50. 88cc of street legal go-kart hilarity, and a 1968 Cadillac Coupé DeVille Convertible 472.

    "The best way to go broke-by-german-car is to buy an 8 series bmw with a v12" - Perc
    "Torque is like pron. You can't really define it, but you will recognize it." - ElToro

  11. #111
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    9.6 AFR ? Are you sure ?

  12. #112
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    Yes, but the extra fuel is negated by the lower price of the E85.
    Current Cars:
    1994 BMW 850 CiA (2017 km). My black on black Wokke'd 5.4l V12 autobahnmuncher
    1992 Donkervoort S8AT (105k km). The mad dutch "Super 7." 300hp/ton of turbo power!
    2013 VW Caravelle 4Motion (57k km). A dark wine red 180PS/400Nm 2.0 BiTDI rocketvan
    2007 SMC F-Kart 50. 88cc of street legal go-kart hilarity, and a 1968 Cadillac Coupé DeVille Convertible 472.

    "The best way to go broke-by-german-car is to buy an 8 series bmw with a v12" - Perc
    "Torque is like pron. You can't really define it, but you will recognize it." - ElToro

  13. #113
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    If you have a normally aspirated engine running 9.6 AFR then something is seriously wrong with the injection system, it must run like crap.

    It should be 14.5 to 15.5 part throttle then gradually richen until wide open throttle to around 13:1

  14. #114
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    I think he was referring to running on E85 ethanol (ethanol fuel blend of up to 85% denatured ethanol fuel and gasoline or other hydrocarbon by volume)
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


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  15. #115
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    Oh I see I thought he meant an E85 BMW running 9.6 : 1

  16. #116
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    Quote Originally Posted by Omega man 1969 View Post
    Sorry, I don't understand your statement. Live tuning has been done on the road not the dyno. If you are comparing a company with large amounts of cash to a " home" tuner then there is no comparison.

    Looking at the k55 details I see this :


    However, there is no verification of 475 hp (354 kW) produced by this car by Racing Dynamics. The K55 produces 380 hp (280 kW) and 405 ft·lbf (549 N·m) of torque as listed in the 02/1994 Euro car magazine. Racing Dynamic's own website lists the K55 at 401 hp (299 kW).[13]
    Yes i meant that,, and also that RD claimed that the car had higher output then real
    Sveinbjörn Hrafnsson

    E30 CABRIO V12 M70B50 ///
    ALPINA B10 BITURBO 346 @ 507
    E34 550 V12 JML
    Contacts
    http://alpina.123.is/pictures/

  17. #117
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    Quote Originally Posted by 4drian View Post
    Yes, but the extra fuel is negated by the lower price of the E85.

    Right sorry for the confusion yes it would be possible to remap an m70 or s70 using the stock DME's, larger injectors maybe needed.....you may get away with winding up the fuel pressure and increasing the duty cycle but the injectors are small. Ignition advance would be easy enough to remap but I'm not sure about the existing lambda sensors and how they would react, I would imagine they would be fine but they may need to be disabled or have wide bands fitted and create your own output curve to keep the DME happy.

    I doubt the intake fuel pump rubber would be very happy or other parts of the fuel system having 85% Ethanol pumped through it.....hopefully the plastic tank would be ok though.

    It's totally doable, but unless you plan on doing a serious amount of miles, I think a lot of hassle.

    You'd really need higher compression like the M73 but then you have the problem of the DME's. Better off sticking a supercharger on it

  18. #118
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    Isnt the compression of the s70 similar to the m73?

  19. #119
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    Quote Originally Posted by Fatandre View Post
    Isnt the compression of the s70 similar to the m73?
    Similar yes, I was referring to Adrian's car

  20. #120
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    a friend of mine with a tuned M73/m70 engine and a manual transmission smoked a jaguar XKR. Smoked him in every run

  21. #121
    Join Date
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    I was thinking E85 for your CSi. I know mine won't benefit from it
    Current Cars:
    1994 BMW 850 CiA (2017 km). My black on black Wokke'd 5.4l V12 autobahnmuncher
    1992 Donkervoort S8AT (105k km). The mad dutch "Super 7." 300hp/ton of turbo power!
    2013 VW Caravelle 4Motion (57k km). A dark wine red 180PS/400Nm 2.0 BiTDI rocketvan
    2007 SMC F-Kart 50. 88cc of street legal go-kart hilarity, and a 1968 Cadillac Coupé DeVille Convertible 472.

    "The best way to go broke-by-german-car is to buy an 8 series bmw with a v12" - Perc
    "Torque is like pron. You can't really define it, but you will recognize it." - ElToro

  22. #122
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    Ah right like you said, not readily available here + plus the problems involved etc. My immediate plan right now is to fit a quiet but free flowing exhaust.

    I'm going to log the throttle plate movement tomorrow in relation to the pedal, it will be interesting to see how it turns out. I heard full throttle isn't reached below a certain RPM....I think that's wrong though.

  23. #123
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    Did something new turn out regarding the throttle?

  24. #124
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    2 x 850csi , E93 320ia
    We are following this tread closely

    Regards
    Terje

  25. #125
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    No I got side tracked and started messing with a window mount camera. I have the potentiometer ready to hook up to the throttle but it's raining hard today
    bloody English Weather. Did a little 20 to 80 mph video comparison with a friends Accord type R. Will post it up shortly. We planned on 0 to 80 but the starts were different.

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