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Thread: Ecm questions for big block chevy swap

  1. #11
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    Quote Originally Posted by ScarabEpic22 View Post
    Are you going to use EFIConnection's kit for crank/cam signals? I know you mentioned using 8100 parts, do you have that sorted out? IMO you're better off sticking with an 01-02 512kb LS1B PCM with the 8.1 OS, it'll be tunable as if it was a 8100 from GM that way. Do you need a COS to support forced induction?

    Off the top of my head:
    CKP
    CMP
    ECT
    IAT
    MAF (if desired, could tune as speed density)
    Knock sensors - setup as factory 8.1 if possible
    O2s (front only)
    Oil pressure - up to you, should be a provision to use it as all LSx engines have a sensor for this
    Oil temp - don't think you can connect to factory PCM
    Fuel pressure - up to you, not needed
    What do you mean by ect? Is that basically the throttle position sensor for electronic throttles? And with the O2 sensors, will I have problems with running an exhaust system that consists of just headers, extensions just long enough to have an O2 sensor bung and have a V band flange welded on, mufflers, and exhaust tips, probably ending just around the back of the cab with no crossover pipe. At this point, oil temp would probably only be for control of the fan on the oil cooler

    Sent from my LGL52VL using Tapatalk

  2. #12
    Joe (Moderator) joecar's Avatar
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    ECT = engine coolant temp
    TPS = throttle position sensor

    ~ posted by phone ~

  3. #13
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    Oh, OK. That makes sense, always seen it abbreviated as cts

    Sent from my LGL52VL using Tapatalk

  4. #14
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    The BBC with the LS1B PCM was DBW/electric throttle as well, not sure if you can get away with a cable tb or if you'd need to use an electric/DBW one. As long as the front O2s are close to the original location for the 8100 you should be ok. Just dont put them right at the end of the tailpipe with that short of an exhaust, will get weird readings.

    No idea on knock sensors for the 8100, just 6/6.2Ls for me so far.

    Call Mike at EFIConnection, he'll let you know which of his kits are the correct one for your application. You want 24x/1x most likely as that's what the LS1B PCM needs.
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

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