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Thread: split second MAF, anybody installed it?

  1. #1
    Join Date
    May 2004
    Location
    Japan
    Posts
    9,249

    Default split second MAF, anybody installed it?

    and what are the results of that?

    http://www.splitsec.com/

  2. #2
    Join Date
    Nov 2004
    Location
    Middle England
    Posts
    286

    Default

    Anyone please correct me if this doesn't make sense, but from a logical viewpoint only (I have no experience of this product), at best all it can do is be a compromise, and I find it hard to believe it can offer improvements without a severe fuel consumption penalty over a either an enhanced DME chip or a completely new aftermarket engine management system.

    Essentially this is because our BMW DME takes into account a LOT of signals, and reading the "split-second" downloadable .pdf file, all they do is modify signals from the DME for fuelling and/or ignition, based on a LIMITED set of signals .... surely all that does is over-fuel ? ... which I suppose maybe OK for the track.
    ... I guess only a fair test will really prove that though.

    Any given engine can only realise a certain performance, and an enhanced DME chip for a 'road car' is far more likely to be able to extract the maximal performance as it has basic access to all signals, albeit based on the built-in algorithms, but using the alterable lookup data; also it will in all probability be more suitable to road use (that is where the greater market volume and profit is anyway), simply because the chip maker will need to maintain a reputation, which can all too easily be lost, but which is next to impossible to regain.

    Only a complete aftermarket engine management system, that is dyno set-up, could produce a better result.
    ... but who can justify such a cost and time expenditure ?

    ... I know I can't.
    '90 535iSE Auto (AE+EAT) 123k miles
    '86 F288 69k miles
    '06('89)- PGE 2.0DOHC Turbo
    '03 A160LE 19k miles
    1914 Stellite E2A (no odometer!)
    (+ others I daren't mention here)
    www.pyghtle.com

  3. #3
    Join Date
    Dec 2003
    Location
    Central NJ - USA
    Posts
    1,540

    Default

    modern performance inc here in NJ sells a MAF conversion

    i assume we're talkin bout this

    E34 535i MAF3.5 Kit

    E34 535i MAF Kit Includes:

    ARM1 Air/fuel Ratio Meter
    ARC2 Air/fuel Ratio Calibrator
    MAF3.5 Mass Air Flow sensor (flanged). Flanged shown.
    MAF Wire Loom
    MAF Gasket
    4" 90 Deg. U Bend Assembly
    3.5"-3.0" Reducer Assembly
    Mounting Bolts
    MAF 3.5 Addaptor
    535i E28 and E34 Installation Instructions
    in a dyno proven article in grassroots motorsports, they found
    20 some odd hp in a m5 motor....

  4. #4
    Join Date
    Dec 2003
    Posts
    835

    Default A maf conversion opens up the intake tract.

    That stock vane air meter on the m30 is very restrictive. I realized some 36+ lb-ft of additional torque below 4,500 rpm, based on dyno comparisons, with my pro flow maf conversion.
    erased due to slander

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