Anybody know where I can get a mafless tune in uk? - Page 2

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Thread: Anybody know where I can get a mafless tune in uk?

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    #11
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    Nope, there's too many variables at this point. On something boosted, it's best to have something watching the airflow. The MAF is the main input for most of the ECU's calculations, so boosting it and running it Alpha N (where it'll be forced to estimate the airflow) could easily end up with a melted engine.
    ACS should have had it well tested before releasing, and it should be spot on. They'll have had access to full engine dynos and loggers and it should be calibrated very well.
     
     

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    #12
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    you uprated the pulley by any chance?

    SUPERCHARGED 318IS
     
     

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    #13
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    No the pulley hasn't been modified at all, I have sent the new maf back to manufacturers to be tested and will wait until that comes back.. If its faulty then i know it's the maf and if its not faulty then there obviously is another problem.

    Could faulty lambda sensors affect anything as these haven't been checked.. Hmmm?
    Loud pipes.. Save lives..

    AC Supercharged - Love to whine and dyne
     
     

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    #14
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    The reason I beleive it is the maf is because after installing a new one, the car ran perfectly for a few weeks.. Then in the high end of revs the yellow light (emissions light?) would flash up and then disappear when the revs dropped after changing gear.. Which would then be followed by the eml lights and limp mode.

    Running the car with the maf unplugged, the light is permanently on and the car runs fine, although I'm led to beleive that it runs on a safe map?
    What I'm hoping to do is sort the problem out.. I've checked for vacuum leaks and everything is as it should be so any advice would be very much welcomed
    Loud pipes.. Save lives..

    AC Supercharged - Love to whine and dyne
     
     

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    #15
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    would this be because it is running lean?
     
     

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    #16
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    If it is how would I find out? And how would I solve it?

    Will
    Loud pipes.. Save lives..

    AC Supercharged - Love to whine and dyne
     
     

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    #17
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    You want to get hold of INPA, from ebay.
    It's a USB lead and diagnostics software that will read your fault codes and tell you the reason your car was holding back the power.

    The cost is about £20-ish, and you'll get better diagnostics than most garages. It's nothing fancy to look at (it was used internally by BMW for car testing and on the production line) but it's good stuff.
     
     

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    #18
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    I will give that a go then thanks for your help

    Quick question - with my current setup (after everything is sorted) the car is running 300bhp according to the ac spec.. Is there anything I can do to up that?

    Cheers will
    Loud pipes.. Save lives..

    AC Supercharged - Love to whine and dyne
     
     

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    #19
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    I think you might struggle, as it is probably an Eaton supercharger which is bolted straight onto the manifold. An intercooler would have helped, but there isn't a way of getting one between the charger and the engine.

    A smaller pulley will increase your boost pressure, and that should give you more power, but too high and it'll need retuning down for safety.
     
     

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    #20
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    It's a centrifugal s/c which runs pipe work into the boot which comes off the throttle body.. I think, with some custom piping an intercooler could be fitted, although would I see much gains for the money? I've also read up about alcohol injection but not too convinced that spraying water into my intake is such a good idea..

    I think the charger runs at around 5psi at the moment so when you say 'too much' how much could it run safely.. And I guess I would have to have it mapped to accommodate the extra boost?

    Cheers
    Loud pipes.. Save lives..

    AC Supercharged - Love to whine and dyne
     
     

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