[ROVERNET - UK] 4.6 SD1
kkinard at wcc.net
Wed Oct 25 21:36:48 BST 2006
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?
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.
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