[ROVERNET - UK] 4.6 SD1

[Kent Kinard]

On Wed, 25 Oct 2006 17:59:56 +0000
  "steve bridge" <slbridge at hotmail.com> wrote:
> Hi Kent,
>  What do you mean: ''Vitesse Spec"?   Is the 4CU the 
>hotwire or the 3.5 EFI 
> (SD1) system?

Hi Steve,
I have your airflow meter but I need a shipping address.

Lucas 4CU systems are all "flapper" air meter systems and 
were used on Federal and Australian SD1's like yours and 
mine.  They were also used on Vitesse, VDP EFI SD1's and 
UK Range Rovers but with the later style plenum and 
velocity stacks and without Lambda sensors.  The Vitesse 
and Range Rover 4CU computers will plug into your Federal 
system and eliminate the Lambda sensors (and catalytic 
converters where state law allows) ;-)  The Range Rover 
and Vitesse ECU's differ from each other and the Vitesse 
is a better match for the SD1 vehicle.

A rising rate fuel pressure regulator ( to counteract high 
speed lean out) and perhaps higher flow injectors would be 
useful.  The Federal type flat plenum is really not that 
bad, particularly with a 3.5 and stock heads.  The ECU and 
piston area are the limiting factors for Federal SD1's. 
 Franc has been doing Vitesse conversions on the Federal 
ECU for quite a few years.  Google "Stunned Buffalo".

13CU and 14CU systems were only used on North American 
Range Rovers for a few years.  This is a "hot wire" system 
but the ECU is not tuneable.  It is easy to upgrage this 
system with a 14CUX ECU and a minor wiring change.  The 
14CUX is the definitive "hot wire" system.  Some came with 
plug in chips and others must have the plug installed. 
Most Range Rovers from '89 to '95 and early Discos.  The 
14CUX can be configured to run with or without Lambda 
Sensors.  Various Eproms were used in different vehicles 
and years.  You need to have the Eprom configured for your 
particular application,  ie. engine size, compression, 
camshaft, vehicle weight, etc.

Roverly,
Kent K.