Hello Aidrian,
I appreciate the nice comments
The needles in the SU carburettors on the 4.6 are BBW. In standard trim though, the needles proved to be too lean, so they had to be polished or carved if you prefer deliver more fuel and to specifically meet the specification and air flow requirements of my engine. The Rover was placed on a rolling road (dyno) with a whole raft of diagnostic equipement. This was undertaken by a Land / Range Rover specialist, and what a truly wonderful job he did.
With linear air/fuel metering across the rev range, the 4.6 delivers 60% more power to the rear wheels compared to Rover running the same equipment specification but with the 3.5 litre engine. A before and after snapshot. Fuel economy has improved too, the 4.6 delivering 29mpg country running, cruising at a consistant 60 to 70mph. The best the 3.5 ever achieved was 26.8mpg back in the early 1990s. Usually consumption was in the range of 23 to 24mpg.
The 4.6 and the way in which it has been set up has totally transformed my Rover and I could not be happier.
Ron.
I appreciate the nice comments
The needles in the SU carburettors on the 4.6 are BBW. In standard trim though, the needles proved to be too lean, so they had to be polished or carved if you prefer deliver more fuel and to specifically meet the specification and air flow requirements of my engine. The Rover was placed on a rolling road (dyno) with a whole raft of diagnostic equipement. This was undertaken by a Land / Range Rover specialist, and what a truly wonderful job he did.
With linear air/fuel metering across the rev range, the 4.6 delivers 60% more power to the rear wheels compared to Rover running the same equipment specification but with the 3.5 litre engine. A before and after snapshot. Fuel economy has improved too, the 4.6 delivering 29mpg country running, cruising at a consistant 60 to 70mph. The best the 3.5 ever achieved was 26.8mpg back in the early 1990s. Usually consumption was in the range of 23 to 24mpg.
The 4.6 and the way in which it has been set up has totally transformed my Rover and I could not be happier.
Ron.