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Thread: Hello

  1. #1
    Carb and Points!
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    Hello

    Newbie here. Have 1995 C4 looking towards the forum to get tuning suggestions to maximize stock motor HP and to help with overall cooling temp maybe fan temp setting and thermostat swap out etc this all.

    Rick

  2. #2
    Carb and Points!
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    Hey there Rick! I've got a 94 C4 that I have the same question about. Looks like we're not the only two in the boat here. There's a couple different programs you can use to modify the fans kick-on temp, TunerPro is a free program if you wanna check it out. I think it can be used for that but I haven't tried it
    I myself am needing to flash my new PCM for my C4 before I can actually muck around with tuning, so I'm a bit stuck atm :/

    ~Ken

  3. #3
    Carb and Points!
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    95 C4 tune

    Quote Originally Posted by KenMathisHD View Post
    Hey there Rick! I've got a 94 C4 that I have the same question about. Looks like we're not the only two in the boat here. There's a couple different programs you can use to modify the fans kick-on temp, TunerPro is a free program if you wanna check it out. I think it can be used for that but I haven't tried it
    I myself am needing to flash my new PCM for my C4 before I can actually muck around with tuning, so I'm a bit stuck atm :/

    ~Ken
    Ken from what I have found there's bin edit sw and also flash sw.
    Tuner pro and tuner pro rt -edits
    Tunercat - flashes
    $EE Hack- datalogs,analyzes and flashes
    winflash- flashes

    then on Moates.net they sell either of the two
    USB to OBD cables for laptop to car interface.

    I did find one of the free bin files and downloaded a copy.

    Im of course trying to find someone that has actually done it
    as I'm not going to experiment and turn my ECM into a brick.

  4. #4
    LT1 specialist steveo's Avatar
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    scan9495 datalogs too

    so does tunerpro rt.

    eehack also does some advanced realtime parameter control

    fbodytech has an archive of stock bins to experiment with

  5. #5
    Carb and Points!
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    Quote Originally Posted by Vpro123 View Post
    I did find one of the free bin files and downloaded a copy.

    Im of course trying to find someone that has actually done it
    as I'm not going to experiment and turn my ECM into a brick.
    Do you happen to have the link for that bin file?
    There's a video I saw of a guy flashing the PCM on his LT1 Impala or Buick or something, but idk if it's the same procedure for flashing a y-body car. I dont know why it wouldn't be, but better safe than sorry

  6. #6
    Fuel Injected!
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    I say Ebay a working ECM or 2 and keep yours as a spare. If anything ever bricks or go wrong you can swap back. If you set an alert you can catch some for cheap.

  7. #7
    Carb and Points!
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    Great idea!! I need to do a search and see what comes up. Maybe even some salvage yards too.

  8. #8
    Carb and Points!
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    It was a site I linked off of the fbodytech site. It let you pick type of mods and generated the bin. I picked lower fan turn on temp and overall stock motor. If you want it just let me know I will email it to you.

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  10. #10
    Fuel Injected! spfautsch's Avatar
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    One cooling suggestion I'd recommend that has nothing to do with tuning is to make sure the steam tube from the back of the heads is open / clear. Also, and more important is seeing that the aluminum line feeding from the tee at the top of the radiator back to the pressure tank is cleared. When I bought my 95 a few years ago I found this line to be completely plugged with stop-leak. With this line plugged the air in the system can never find it's way to the pressure tank, creating hot spots in the heads and generally reducing the cooling system's efficiency. Be warned, there's a 0.0625" orifice on the end of the aluminum tube at the front where the rubber hose is crimped on. If you try pushing a piece of wire through to confirm there are no clogs it will stop there.

    Also, a 160F t-stat off RockAuto, along with dropping the fan turn-on temps helps immensely. Even using A/C on a hot day mine hasn't been over 200F since a complete rebuild (including 160F t-stat).

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