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Thread: Camaro l99 in a G8

  1. #1
    Advanced Tuner morepowerjoe's Avatar
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    Camaro l99 in a G8

    Hey guys I hope you all are doing well. Anyways the title days it all, almost. I have a l99 from a 2012 camaro that I think I would like to try to swap into a Pontiac G8. My questions are can I use the e38 from the camaro to run the l99 in the g8 or should I forget that and just use the ecm in the g8? The l99 has variable valve timing in it but I don't think the g8 does. I know they both have afm which I have deleted in the l99 but kept the vvt. If thats the case then I can just do a vvt delete on the l99 as well. So, I was looking at the difference in between the tunes and I noticed that the maf in the g8 only goes up to like 4500 lb/h and the camaro tune goes up to 10,000 lb/h. Is this a big deal?
    L99 A6 - DSS FX Forged Piston's, Eagle ESP L19 Rods, ARP Head and Main Studs, LS9 Head Gaskets, GPI SS3 VVT Camshaft, GM Performance Racing Lifters, CHE Trunnion Upgrade, TSP Chrome Molly Pushrods, BTR .660 Valve Springs, GM Hollow Intake Valves, Melling 10355HV Oil Pump, IR EGM-205 Oil Pan Baffle, Cold Air Inductions CAI, Fast LSXR Intake Manifold, Nick Williams 103 TB, TSP 1 7/8" Longtubes with 3" TSP Exhaust, Mishimoto Oil Cooler, Tru Cool 40k Tranny Cooler, 3600 Circle D Converter

  2. #2
    Advanced Tuner morepowerjoe's Avatar
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    I guess what I really need to know is what the difference between the 2009 G8 E38 ecm vs the 2012 Camaro E38 ecm? One of the things that concern me is the variable valve timing. I know in the 2009 G8 ecm there is a section in the tune that has a spot for vvt operation so is it as simple as filling in the parameters in the tune file for the vvt to work?
    L99 A6 - DSS FX Forged Piston's, Eagle ESP L19 Rods, ARP Head and Main Studs, LS9 Head Gaskets, GPI SS3 VVT Camshaft, GM Performance Racing Lifters, CHE Trunnion Upgrade, TSP Chrome Molly Pushrods, BTR .660 Valve Springs, GM Hollow Intake Valves, Melling 10355HV Oil Pump, IR EGM-205 Oil Pan Baffle, Cold Air Inductions CAI, Fast LSXR Intake Manifold, Nick Williams 103 TB, TSP 1 7/8" Longtubes with 3" TSP Exhaust, Mishimoto Oil Cooler, Tru Cool 40k Tranny Cooler, 3600 Circle D Converter

  3. #3
    Tuning Addict 5FDP's Avatar
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    You must use your G8 computer. Lots are different between calibrations plus your 6L80e is already "married" to that computer.

    Just delete the VVT if you can't enable the VVT in your calibration.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  4. #4
    Advanced Tuner morepowerjoe's Avatar
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    Quote Originally Posted by 5FDP View Post
    You must use your G8 computer. Lots are different between calibrations plus your 6L80e is already "married" to that computer.

    Just delete the VVT if you can't enable the VVT in your calibration.
    So can I get the dealer to reflash the TCM in the G8 to get the tranny to work or how can I fix that?
    L99 A6 - DSS FX Forged Piston's, Eagle ESP L19 Rods, ARP Head and Main Studs, LS9 Head Gaskets, GPI SS3 VVT Camshaft, GM Performance Racing Lifters, CHE Trunnion Upgrade, TSP Chrome Molly Pushrods, BTR .660 Valve Springs, GM Hollow Intake Valves, Melling 10355HV Oil Pump, IR EGM-205 Oil Pan Baffle, Cold Air Inductions CAI, Fast LSXR Intake Manifold, Nick Williams 103 TB, TSP 1 7/8" Longtubes with 3" TSP Exhaust, Mishimoto Oil Cooler, Tru Cool 40k Tranny Cooler, 3600 Circle D Converter

  5. #5
    Tuning Addict 5FDP's Avatar
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    There is way more to it than just the PCM/TCM. All of the other control modules talk with each other in these cars. You can't just stick a 2012 calibration file from a Camaro into an older 2008 G8 and have everything work like it did before.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  6. #6
    Advanced Tuner morepowerjoe's Avatar
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    So if I do this swap I would want to keep the tranny from the G8 correct? I mean that would be the simplest thing to do?
    L99 A6 - DSS FX Forged Piston's, Eagle ESP L19 Rods, ARP Head and Main Studs, LS9 Head Gaskets, GPI SS3 VVT Camshaft, GM Performance Racing Lifters, CHE Trunnion Upgrade, TSP Chrome Molly Pushrods, BTR .660 Valve Springs, GM Hollow Intake Valves, Melling 10355HV Oil Pump, IR EGM-205 Oil Pan Baffle, Cold Air Inductions CAI, Fast LSXR Intake Manifold, Nick Williams 103 TB, TSP 1 7/8" Longtubes with 3" TSP Exhaust, Mishimoto Oil Cooler, Tru Cool 40k Tranny Cooler, 3600 Circle D Converter

  7. #7
    Advanced Tuner morepowerjoe's Avatar
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    My next question might be kind of dumb but is the harness connectors to the ecm the same across all e38's? I'm assuming that the 2012 Camaro harness will plug into the 2009 G8 e38?
    L99 A6 - DSS FX Forged Piston's, Eagle ESP L19 Rods, ARP Head and Main Studs, LS9 Head Gaskets, GPI SS3 VVT Camshaft, GM Performance Racing Lifters, CHE Trunnion Upgrade, TSP Chrome Molly Pushrods, BTR .660 Valve Springs, GM Hollow Intake Valves, Melling 10355HV Oil Pump, IR EGM-205 Oil Pan Baffle, Cold Air Inductions CAI, Fast LSXR Intake Manifold, Nick Williams 103 TB, TSP 1 7/8" Longtubes with 3" TSP Exhaust, Mishimoto Oil Cooler, Tru Cool 40k Tranny Cooler, 3600 Circle D Converter

  8. #8
    Advanced Tuner morepowerjoe's Avatar
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    Quote Originally Posted by morepowerjoe View Post
    My next question might be kind of dumb but is the harness connectors to the ecm the same across all e38's? I'm assuming that the 2012 Camaro harness will plug into the 2009 G8 e38?
    I answered my own question from this thread. https://forum.hptuners.com/showthrea...th-E78-ECM-VSS
    L99 A6 - DSS FX Forged Piston's, Eagle ESP L19 Rods, ARP Head and Main Studs, LS9 Head Gaskets, GPI SS3 VVT Camshaft, GM Performance Racing Lifters, CHE Trunnion Upgrade, TSP Chrome Molly Pushrods, BTR .660 Valve Springs, GM Hollow Intake Valves, Melling 10355HV Oil Pump, IR EGM-205 Oil Pan Baffle, Cold Air Inductions CAI, Fast LSXR Intake Manifold, Nick Williams 103 TB, TSP 1 7/8" Longtubes with 3" TSP Exhaust, Mishimoto Oil Cooler, Tru Cool 40k Tranny Cooler, 3600 Circle D Converter

  9. #9
    Advanced Tuner morepowerjoe's Avatar
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    My next thing to do is figure out if a 2009 G8 o2 sensor is interchangeable with a 2012 o2 sensor other then the connector ends. Will the 2012 sensors work on the 09 ecm?
    L99 A6 - DSS FX Forged Piston's, Eagle ESP L19 Rods, ARP Head and Main Studs, LS9 Head Gaskets, GPI SS3 VVT Camshaft, GM Performance Racing Lifters, CHE Trunnion Upgrade, TSP Chrome Molly Pushrods, BTR .660 Valve Springs, GM Hollow Intake Valves, Melling 10355HV Oil Pump, IR EGM-205 Oil Pan Baffle, Cold Air Inductions CAI, Fast LSXR Intake Manifold, Nick Williams 103 TB, TSP 1 7/8" Longtubes with 3" TSP Exhaust, Mishimoto Oil Cooler, Tru Cool 40k Tranny Cooler, 3600 Circle D Converter