Thread: Converting Rangie V8 to EFI

You wont need an afm with an aftermarket ecu as they use a map and O2 sensor, holden V8 injectors will be cheaper and better.

Adam

My 4.6 conversion seems a bit similar to yours it uses a Motec M48 programmable ECU, am very happy with the performance. Other than that the conversion was done by Graeme Cooper Automotive in Sydney.

The one thing Ward and Graeme were very particular about was not using the early RR system, which would be what you have from the 87. You would need to talk to Graeme or Ward at Cooper's to find the actual issues. (02 9550 2689)

Regards
Diana

I will have to find out more about that as I thought the later models were exactly the same as the 3.5 other than the AFM.

Sounds good that you dont need a AFM

The main problems with the 3.5 are.
The 3.5 injector rail is old fashioned with little pipes to the injectors. modern injectors are plug in with o rings. Holden injectors are good but smaller output ( 18 lbs per hour) than 3.9 injectors ( 22.5Lbs per hour), but hey they run a 5 litre so should be OK.
The 3.5 manifold has a smaller throttle body than a 3.9 or 4.6. You may find loss of power at high revs.
The 3.5 does not have provision for a stepper motor as cold start increase in air is done by supplementaryair control valve. This is an old Bosch system but can be OK. Several aftermarket systems require use of a different stepper anyway, so the 3.5 will be able to be adapted by putting a stepper in the line that the air valve is in.
In short the 3.5 is OK but it is more desirable to use a 3.9, 4.0, or 4.6 manifold. If you have a 3.5 for nothing, then it is best to buy a 3.9 rail, as many more injectors are readily available.
You do not have an afm with any aftermarket injection AFAIK.
O2 sensor use depends on the ECU and is not related at all to the manifold used.
Any heads can be used. All you have to do is grind a little crescent in the end of the port to match the manifold gasket, where the injector is.
Regards Philip A