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Thread: Holley Integration into E38

  1. #1

    Holley Integration into E38

    Im planning on going to Holley in my G8, mostly for engine safety. I really wish to retain as much functionality as I can, including AC, possibly cruise control, fan control, and fully functional Cluster, which shouldn't be a problem as its just ECT, RPM, and Speed (which is off wheel speed sensors in my application)

    I do have a few questions for those more knowledgeable with the e38s.

    1. What all sensors can be removed from a e38 before it throws reduced power mode on the DIC, or anything similar. traction control failure, abs, ect.. as I fear I wouldnt be able to get those to disapear using hptuners.
    2. Will a e38 freak the dash out if I keep it controlling the throttle body, while the Holley simply gets a TPS reading from it. (my thinking is this might retain cruise control) This will likely cause issues with holding idle id fear though. I wish I could come up with a better idea.
    3. If I decide towards the Holley controlling the DBW, I know that will throw a few DIC errors, I believe that was one condition for reduced engine power or something similar, is that fixable in hptuners? I know you can disable reporting on some but not all CELs.
    4. Does the e38 need to see a cam position sensor? I wouldnt think so but I could also see a Cam crank correlation code being non removable in hptuners.
    5. Do I have to worry about any canbus wiring in the main engine harness? I know I had to deal with some of that trying to get my manual swap to work properly, and it wasn't fun.

    Thus far I think im going to start with just giving the stock ecu a split CKP signal, a new CTS sensor, the AC sensors, and the transmission sensors (tr6060). depin and remove all wiring for injectors, coils, map, maf, ect.

    Any advice would be greatly appreciated, I cant find much on this for the e38s.

  2. #2
    Senior Tuner
    Join Date
    Nov 2006
    Posts
    4,018
    Unless this is a race car you'd be much better off sticking with the stock stuff. Just my opinion.

    It's not uncommon to have 800-1000 rwhp (really even more than that) with stock ECM
    Tuner at PCMofnc.com
    Email tuning!!!, Mail order, Dyno tuning, Performance Parts, Electric Fan Kits, 4l80e swap harnesses, 6l80 -> 4l80e conversion harnesses, Installs

  3. #3
    Yeah it started out as a street car, but its slowly turning into a race car. I know theres high power cars out there on stock ecus, I mainly want closed loop wot should something happen the holley can try and save it, or go into a safety atleast. I also have the lower flow rate limit e38 so alot of tables had to be jacked up to get everything to work properly, I was on the fence about doing this for a while but ended up taking advantage of there black friday deals over at holley.
    End goal is a 427 / 2650 setup.

  4. #4
    Advanced Tuner
    Join Date
    Dec 2019
    Location
    MS
    Posts
    814
    Im building a harness now for a 2010 Camaro and integrating in the E38.
    What im going to do is just disabled all the DTCs and feed the E38 most of all the same signals as its getting from factory to keep it happy. If that becomes too much hassle its just going to get a Holley 6.86" Pro Dash.

    This car has a LSX 454 and a 105mm cable throttle body and Transbrake 4L80E with 3 stages of nitrous running Q16 fuel on race day and 93 for driving so the holley makes all that easy.