1997 E36/7 Z3 2.8 - Where to go for a remap after M50 mani conversion?

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  1. 1997 E36/7 Z3 2.8 - Where to go for a remap after M50 mani conversion? 
    #1
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    The Boz's Car Details
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    Hi all,

    After doing the M50 manifold & bbtb conversion, using alpina527's awesome kit, I'm now looking for a remap. Does anyone know somewhere decent in the Yorkshire area where I can get it on the rollers and get this done properly?

    Thanks,
    Leon
     
     

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    Custom Tuning in Bradford mate...good prices and good jobs...never been there myself but have only heard good things about them.

    www.customtuning.co.uk
     
     

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    Cheers mate. Just spoke to them and £250 for a custom remap done on their rollers (not just some generic pre-programmed map flashed onto my ecu) seems very reasonable. Can anyone vouch for these guys? The guy I spoke to certainly seemed to know what he was on about, I’d just really like a second opinion now, then I’ll take her over to them.

    Thanks,
    Leon
     
     

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    We have a few tuners on this site in the vendor section...all are good or else they wouldn't be our vendors I think Emaps are up your neck of the woods

    http://www.bimmerforums.co.uk/forum/f116/

    http://www.bimmerforums.co.uk/forum/f113/

    http://www.bimmerforums.co.uk/forum/f120/
     
     

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    thanks for the reply, but birmingham is a bit of a trek. it'd be a 6hr round trip, and thats not including time spent actually at the place! motech have a guy in leeds who'll come to my house and flash the ecu from there, but this is exactly what i dont wanna do.
    so far smudge's advice seems the way for me to go. i've spoke to them and if I'm not happy with their map, they'll return it to stock for free.

    Thanks for the advice,
    Leon
     
     

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    no problem fella, hope the remap goes well...let us kno the results where ever you get it done.
     
     

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    Interesting topic. My feeling on the matter is that it's a lot of clever marketing. Why is a map developed on a rolling road over a couple of hours better than a "generic map" that has had many hours hours of work, developed on both the rollers and the road and been successfully proven on countless other cars?

    The M50 manifold mod is also one of the most common mods out there and there are lots of maps that cater for it.

    Ian
     
     

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    Hmmm very interesting. I had never thought about it like that. My thinking was that each car (especially older ones like mine) is different, and a custom map tailored specifically for the way that particular car runs would be better than a generic one. The guys at this custom place told me one of the things they’d do would be to adjust the map to smooth out the torque curve, and this is my main reason for wanting it remapped: it feels a bit lumpy across the rev range. Now I thought that’s something a generic map couldn’t do as effectively as a custom one. I could be wrong, I don’t think I know enough specifics about how remapping works to be certain. I know the ecu takes inputs from engine speed, throttle position, air temp, air mass flow, o2 sensors, etc.; uses the map as a reference; and then outputs signals to control ignition timing, vanos, fuel injection, etc. So changing the map changes how the ecu responds to any given set of inputs. Beyond that, I don’t know specifics of how remapping is done.
    It’s an interesting point you’ve made, and it’ll be interesting to see if anyone with detailed experience messing with maps can drop in with their thoughts.

    Thanks,
    Leon
     
     

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    Lol, well that's the other thing. I have never got how tuners can do things like "smooth out the torque curve." Surely it's just the case of getting the fuel/air mixture right for the given load? You adjust the fuelling / spark to accomplish this and then the engine doesn't run too hot etc. Saying that I can't map so maybe someone could explain.

    Remember that your car will respond / adapt to lambda feedback so variation between cars is less of an issue.

    Ian
     
     

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    With an OBD2 spec ecu (like the 328s, although the missed out the handy bits for the end users) and everything newer, the ECU has it's inbuilt adaptation system.

    All you need to do is tell it what you want, and the adaptation system will get there for you.

    Any lumps in torque curves will be either planned from the manufacturer, but most likely due to the engine's own characteristics. Certain points will line up where intake manifold tuning, exhaust manifolds, the factory cams and the vanos settings are all fiddled with to give a smoother, linear torque curve.

    Any peaks or troughs left over in the torque curve will be artificially tuned to hide them, boosting the low points, and downtuning any peaks.
     
     

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