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Thread: CIS vs. Digifant

  1. #1
    Join Date
    May 2006
    Location
    Tonganoxie, Kansas
    Posts
    31

    Default CIS vs. Digifant

    I have a 87 A2 GTI. For you in the Southeast it is Mike Reids old car. It currently has CIS with no electronics. It appears to be well developed and has caused me no problems. I am considering changing it over to Digifant with a Mega Squirt ECU. From you all that have a lot of Vdub experience, what are the pros and cons? Is this a good idea or should I stick with what I have?
    ALEX WILEY

    59 SAAB 750GT MINI STOCK 70-72
    67 NSU 1000TT C SEDAN 73-75
    67 NSU 1000 TTS GT5 81-82
    74 FIAT 128SL GT5 83-84
    71 DATSUN 510 MINI STOCK 89-91
    74 SAAB 99 ITB 92
    74 VOLVO 142 MINI STOCK 93-05
    84 VW GTI ITB 06-08
    87 VW GOLF GTI ITB #15 CURRENT

  2. #2
    Join Date
    Apr 2001
    Location
    Belmont, CA USA
    Posts
    1,098

    Default

    Alex, if it's not broke, don't fix it.
    Tim Linerud
    San Francisco Region SCCA
    #95 GTL Wabbit
    Convert from GP to GTL
    http://www.timlinerud.com/racing/index.html

    racer_tim @ yahoo dot com

  3. #3
    Join Date
    Feb 2007
    Posts
    292

    Default

    steep learning curve and dyno time might be a draw back. the good thing with mega squert is no vw computer, I have a bunch of BAD digi computers......only if you could run it like a honda and no air flow meter...
    ______________
    Waterhaus Racing is Back!
    NRSCCA Competition Chair
    BOG Member
    "Nebraska organizing committees
    to race in Iowa & Ne board thing "
    Still working on a name...
    X-MVRG Member...
    ITB Rabbit/ITA Miata

  4. #4
    Join Date
    Nov 2001
    Location
    Wheaton, IL
    Posts
    1,893

    Default

    I have considered this as well. Thing is that my CIS-E setup is giving me good results (for our motor). I am still thinking about it for a few reasons:

    1. I don't KNOW whether there will be any gains, but I know it will have a broader operating window (now run fixxed timing and 'switch' type fuel enrichment).
    2. Old Bosch system replacement parts are $$$ and hard to find, but an electronic system uses somewhat current technology.
    3. The air meter/airbox assy on the digi car weighs 5# less than the CIS-E air meter/airbox assy, and sits right over one of the front tires.

    The thing that stopped me from doing this sooner was the first reply to your question - what I had was working well. But at the end of the day, if I don't explore what this can do, I can't convince myself that I have a truely 100% motor...
    Chris Schaafsma
    Golf 2 HProd

    AMT Racing Engines - DIYAutoTune.com

  5. #5
    Join Date
    May 2006
    Location
    Tonganoxie, Kansas
    Posts
    31

    Default

    Thanks for all your input. After looking at the size of the Air Flow Meter, I am wondering what adcantage, the electronic system will be. If it was legal to eliminate it (its not) then I think it might be a no brainer. I am just trying to coax a little more speed out of the car and maybe keep Albin in sight.
    ALEX WILEY

    59 SAAB 750GT MINI STOCK 70-72
    67 NSU 1000TT C SEDAN 73-75
    67 NSU 1000 TTS GT5 81-82
    74 FIAT 128SL GT5 83-84
    71 DATSUN 510 MINI STOCK 89-91
    74 SAAB 99 ITB 92
    74 VOLVO 142 MINI STOCK 93-05
    84 VW GTI ITB 06-08
    87 VW GOLF GTI ITB #15 CURRENT

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