Results 1 to 9 of 9

Thread: Concerns for E78 standalone use?

  1. #1
    Senior Member
    Join Date
    Jul 2012
    Posts
    158

    Default Concerns for E78 standalone use?

    I have a guy wanting to use his original e78 from his 2011 L96 6.0 engine in a swap project. I have some concerns but I know so little about the e78 I wanted to verify that my concerns are legit and that I am not making more out of it.

    First off I see evidence that the E78 cannot control discrete fans in any way

    2nd I read that it cannot produce any sort of tach output signal outside of the can-bus info..

    He wants to run a 4L60e trans behind it because that's what is currently in the vehicle (1997 truck), I have a feeling that isn't even possible.

    I would prefer to just set him up with an e38 ecm, t42 tcm, and a harness to match and be done with it.

    I would love some input on these ecms, or maybe even a point in the right direction to some other threads. I have searched around some, but I don't feel like I am getting the complete story. Any info is very much appreciated. THANKS!

  2. #2
    Lifetime Member
    Join Date
    Mar 2006
    Posts
    4,798

    Default

    I'll admit, I've only tuned the E78 in my Sonic (factory ECM) so I cant help with the swap part. I will say, compared to an E38 or E67, it will be a bit more difficult for swapping. You'll need to use a T42 regardless to control the 4L60E, but thinking about it, did any E78 ever pair with them or just T43s in V8s and T76 for I4s?
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, starting the mods
    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.

  3. #3
    Senior Member
    Join Date
    Jul 2012
    Posts
    158

    Default

    That's what I'm concerned with. As far as I know there was never a t42 with the e78. Not even in the L96 vans. I'm pretty sure they were all 6L90es.

  4. #4
    Lifetime Member ProperTuningOG's Avatar
    Join Date
    Dec 2014
    Posts
    218

    Default

    Usually if we run into a E78, it gets swapped for an E38 or E67. Definition on them is not that great.

  5. #5
    Senior Member
    Join Date
    Jul 2012
    Posts
    158

    Default

    Ok, thanks for the input guys. I see that people rarely use them for a swap. For whatever reason I like to torture myself and try things just to see if I can do them, but in this case it seems like it isn't worth the effort.

    Just for my knowledge, am I right about the lack of traditional tach output signal and lack of discreet fan option? What other holdbacks are there? Like I said, I just like to know so I know what I'm dealing with. The next person might want to use a mechanical fan and Dakota digital gauges that get info off the obd2 port, sounds like that would be ok to use the e78...other than the "weird" approach to tuning them.

  6. #6
    Lifetime Member
    Join Date
    Mar 2006
    Posts
    4,798

    Default

    Quote Originally Posted by LS-SWAPPER View Post
    That's what I'm concerned with. As far as I know there was never a t42 with the e78. Not even in the L96 vans. I'm pretty sure they were all 6L90es.
    That was my thought as well, I know the HD trucks had E78+T43s too. You could maybe run a swap harness for the T43, but I've only heard of the T42 wiring -> T43 TCM for people wanting to swap 6spds into 4spd vehicles. We're also getting super solution-ny vs just going the easier route of E38+T42 (Express Van would be super easy combo, segment swap the Express 4L80E T42 with a TBSS 4L70E segment).

    Quote Originally Posted by LS-SWAPPER View Post
    Ok, thanks for the input guys. I see that people rarely use them for a swap. For whatever reason I like to torture myself and try things just to see if I can do them, but in this case it seems like it isn't worth the effort.

    Just for my knowledge, am I right about the lack of traditional tach output signal and lack of discreet fan option? What other holdbacks are there? Like I said, I just like to know so I know what I'm dealing with. The next person might want to use a mechanical fan and Dakota digital gauges that get info off the obd2 port, sounds like that would be ok to use the e78...other than the "weird" approach to tuning them.
    I understand the torture bit, I'm always dreaming up crazy swap ideas but then come back to earth when looking at feasibility

    Have you looked at a Sonic E78 tune file? Im seeing Discrete fans as the factory settings in my file, and the vehicle has efans from the factory. The E78 doesnt have all of the options available that E38/E67s do and you may need to use another software to adjust the efan parameters like E38/E67s or get cax-ing.

    For speedo, not sure unfortunately.
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, starting the mods
    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.

  7. #7
    Lifetime Member ProperTuningOG's Avatar
    Join Date
    Dec 2014
    Posts
    218

    Default

    Even with other software, a truck base and discrete fan has never worked. Tried it with more than one other option......

    With the VSS over can. If you can log it in the scanner, odds are you can use the OBD2 to get it to the gauges.

  8. #8
    Lifetime Member minytrker's Avatar
    Join Date
    Jan 2006
    Posts
    1,308

    Default

    We just swap them them to E38, to many issues with E78 in swaps and lack of options on trans combinations.
    99 Z28 Camaro|LS1 Heads & cam Tuned by LSX Power Tuning
    2003 CC Duramax Dually|19.5 w/245/70/19.5|Tuned by LSX Power Tuning|5in exhaust
    2009 G8 GT Vararam CAI|Tuned by LSX Power Tuning|GXP Mufflers|Custom System
    2006 CTS-V K&N CAI|OBX Headers|Cammed LS3|Tuned by LSX Power Tuning|

  9. #9
    Senior Member
    Join Date
    Jul 2012
    Posts
    158

    Default

    I agree, and that's what I'm doing. My deal is I want to know what those "too many issues" are. I just like to have a full understanding of what's what. Thanks for the input everyone.

Similar Threads

  1. Replies: 5
    Last Post: June 20th, 2017, 06:06 AM
  2. 5.3 w/standalone and th400
    By Bajakguy2 in forum Gen III V8 Specific
    Replies: 4
    Last Post: April 11th, 2016, 01:03 PM
  3. Cummins Standalone?
    By wickedcummins in forum Do you want to be a Beta Tester?
    Replies: 4
    Last Post: January 12th, 2012, 01:41 AM
  4. Standalone reprogramming...
    By picnic_george in forum General (Petrol, Gas, Ethanol)
    Replies: 9
    Last Post: October 2nd, 2011, 06:07 PM
  5. New user: Some concerns.
    By black z in forum General (Petrol, Gas, Ethanol)
    Replies: 4
    Last Post: May 14th, 2006, 09:11 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •