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[./v6_efi_conversions.html]
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[./wiring_harnesses.html]
[./modified_memcals.html]
[./v6_conversions.html]
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[./vr_manual_conversions.html]
[./speedo_adapters.html]
[./engines.html]
[./engine_building.html]
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[./v6_efi_conversions.html]
[Web Creator] [LMSOFT]
V6 Conversions
Phoenix Mechanical
Soaring

V6 Commodore engines are a popular choice for conversions. These engines can be purchased in kit form, with all bolt-ons. These V6's, either early VN or the even the Ecotec motor, can be fitted to early model Commodores legally, as well as a myriad of other vehicles, like Toyota Hilux, Ford Econovan and Hot Rods.

To keep a conversion simple, a VN II or VP engine is the easiest and usually the cheapest to do. Less technology! VR engines require slightly more effort, as they are the first to use security disabling through the PCM and the first with an electronic automatic transmission. VS's are slightly more involved again, VT's get even more complicated, and so on!

P.S. An ECM (Engine Control Module) controls an engine. A PCM (Powertrain Control Module) controls and engine and a transmission.

P.P.S. We prefer to not use early VN V6 motors for conversion, as their coolant plumbing is more intricate (to put it nicely). They take up slightly more room, are messier, and are less reliable (in our opinion).

If you are going to buy an engine only (as in a manual 4WD application), VN and VP engine packages are very simply, and can be used in automatic and manual situations without any major issues. If you are going to buy a VR V6 or later, it will need to have a manual ECM and engine harness. If you don't, you WILL have problems. VR's were the first to use an electronic transmission, as stated above, so the engine harness also includes a transmission harness. If this harness and PCM is used but not connected to a transmission, the PCM will think there is something severely wrong with the trans (because it isn't there), and a multitude of Malfunction codes will be set. When a code is set an ECM/PCM, the ECM/PCM will revert to "limp home mode", meaning that only basic programmed functions will be used, until the codes are repaired/removed.

For this reason, it is important to fit a MIL (Malfunction Indicator Lamp, aka Engine Check Lamp). A MIL should illuminate when the ignition of the vehicle is on, and once the engine is started, it should go out. If it does not, there is an ECM/PCM issue that requires attention.

VR Commodores where also the first model to have an OBD2 (Onboard Diagnostic) connector. This is also important to fit during a conversion, so that a scan tool (Holden or Generic) can be plugged to it, to check ECM/PCM functions and codes.

Automatic PCM's and wiring harnesses can be made to operate without being connected to an automatic transmission, but the process is a lot more involved.

P.S. Ensure that the wiring loom and the ECM/PCM matches the engine and gearbox you purchase. Different model V6 Commodores use different wiring harnesses and ECMs/PCMs.


SEE V6 EFI CONVERSIONS FOR MORE