General conversion requirements and tuning info
Posted by MACE Support, Last modified by on 06 October 2014 01:58 AM

L67 conversion into factory 5 speed manual (T5/getrag) commodore

  • Mirror balance flywheel to flexplate (balance pressure plate to FW for added security)
  • Get the crankshaft drilled for flywheel dowels to fit flywheel
  • If running the factory loom then several wires must be extended including:
  • Fuel injectors
  • Crank angle sensor
  • Temperature sensor
  • High flow fuel pump (walbro 255LPH EFP-057/GSS-342)
  • PCM/memcal must be recalibrated.
  • These following steps regarding wiring only apply if your undertaking a complete conversion (meaning Ecotec/Buick V6 and automatic transmission swapped with an L67 and manual transmission)
    - bridge neutral/park safety switch permanently for the car to start
    - wire up the manual speed sensor to the dash (3 wires)
    - wire the manual reverse switch to the reverse lights (2 wires)



L67 conversion into factory 4 speed auto commodore

  • If running the factory loom then several wires must be extended including:
  • Fuel injectors
  • Crank angle sensor
  • Temperature sensor
  • High flow fuel pump (walbro 255LPH EFP-057/GSS-342)
  • PCM/memcal must be recalibrated
  • Make sure you retain the L67 flexplate when purchasing the motor as the ecotec and L67 have dissimilar rotational harmonies
  • These following steps regarding wiring only apply if your undertaking a complete conversion (meaning Ecotec/Buick V6 and automatic transmission swapped with an L67 and manual transmission)
    - bridge neutral/park safety switch permanently for the car to start
    - wire up the manual speed sensor to the dash (3 wires)
    - wire the manual reverse switch to the reverse lights (2 wires)

Requirements to turn an L36 (ecotec) into an L67 (top swap)

  • L67 cylinder heads
  • L67 lower inlet manifold
  • L67 blower and intake
  • L67 tensioners and pulleys
  • L67 alloy coolant pipe
  • L67 harmonic balancer (mirror-balanced to suit ecotec bottom end)
  • L67 vacuum hoses or can be purchased from auto parts stores in different lengths/diameters
  • L67 fuel rails
  • L67 36lb injectors
  • L67 Alternator
  • If running the factory loom then several wires must be extended including:
  • Fuel injectors
  • Crank angle sensor
  • Temperature sensor
  • High flow fuel pump (walbro 255LPH EFP-057/GSS-342)
  • PCM/memcal must be recalibrated

 

 This chart applies to vehicles running the ECU originally wired into the car and informs what type of tune is required for that ECU

 



PLEASE SELECT THE LINK THAT BEST SUITS YOUR SET-UP


VN-VR commodore running the L67 with factory VN-VR ECU
unfortunately we cannot modify this ECU at this time; a proper custom tune will be required to run an L67 safely. However, if a simpler conversion is desired, we recommend using a VS L67 or Ecotec loom and modifying that accordingly running alongside the VS L67 ECU or Ecotec ECU. If this path is taken then we can accommodate a tune for that ECU, please see the ‘VS commodore running the L67 with factory VS ECU’ link below.

VS commodore running the L67 with factory VS ECU
(select set-up from drop down menu)


VT commodore running the L67 with factory VT ECU
(select set-up from drop down menu)


VU commodore running the L67 with factory VU ECU


VX commodore running the L67 with factory VX ECU


VY commodore running the L67 with factory VY ECU


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