Range Rover Engine swapping, it's acceptable to most significant others...
John, The greater fuel flow requirement and different cam of the bigger engines would probably require a different fuel map setup to maximise running and emissions efficiency. This could be eliminated by fitting a programmable digital 3rd party system. (Haltech or Wolf). The Haltech system on my 3.5L to 4.6L upgrade on my SD1 VDP cost approx AU$1200. I was able to retain my original pump, injectors and regulator. As well as dumping the troublesome OEM fuel ECU, I also got to lose the restrictive flap type airflow meter and the injector ballast resistor pack, all of which I had trouble with.
Cheers Dave email@example.com South Australia
Fitting a different fuel pressure regulator is a cheap way to deal with this issue.
You can use the same top end components on the 4.6L block. The hot-wire EFI's can account for increased air flow through the system better than the older flapper type. When I put the 4.6L in my '95 Disco, I used most of the bolt-ons. The things I didn't re-use (oil pan, valve covers, timing cover and bottom half of FI intake manifold) I did for convenience. I upgraded the ECU chip for better performance and mileage.
Tony V. Sawyer, CHG Hydrogeologist
>My friend Eric replaced his 3.5 with a 4.6 and I believe he's running a 4.2 >ECU though I could be way off.
That's correct. Eric