MRDAGERUS
Automotive
- May 19, 2009
- 31
Hi All,
I'm considering replacing manual steering rack in my 88 Lotus Esprit with a hydraulic power rack.
Whilst investigating possible donors, I found that racks on
BUICK ALLURE 2005-2009, CENTURY 2003-2005, LACROSSE 2005-2009, REGAL 2003-2004,CHEVROLET IMPALA 2000-201, MONTE CARLO 2000-2007,PONTIAC GRAND PRIX 2004-2008 are pretty close to what I need.
Some of them have a Magnasteer variable assist racks (from 2002 on) which would be a wonderful to incorporate.
Dependent on speed, the M/Steer gets 0-5V signal from the BCU on these cars.
...
The electronic brake (and traction) control module (EBCM/EBTCM) controls a bi-directional magnetic rotary solenoid. The solenoid is located in the steering gear. The solenoid adjusts the amount of power steering assist in order to achieve a given level of driver effort in order to turn the vehicle. The EBCM/EBTCM varies the steering assist by adjusting the current flow through the solenoid. The amount of steering assist adjusted for steering is dependent upon vehicle speed.
As the vehicle speed increases, the following actions occur:
The steering assist decreases.
The steering wheel driver effort increases.
As the vehicle speed decreases, the following actions occur:
The steering assist increases.
The steering wheel driver effort decreases.
...
Since '88 Esprit speedometer is mechanical and a car does not have a CPU nor ABS computer, I can not get the speed signal to the M/Steer. Would you be able to recommend where to get a processor which can simulate or substitute BCU output for this one particular function, (i.e. vehicle speed/Volt range)?
Or... is it more complicated than I think?
Any thoughts would be appreciated.
Thank you
I'm considering replacing manual steering rack in my 88 Lotus Esprit with a hydraulic power rack.
Whilst investigating possible donors, I found that racks on
BUICK ALLURE 2005-2009, CENTURY 2003-2005, LACROSSE 2005-2009, REGAL 2003-2004,CHEVROLET IMPALA 2000-201, MONTE CARLO 2000-2007,PONTIAC GRAND PRIX 2004-2008 are pretty close to what I need.
Some of them have a Magnasteer variable assist racks (from 2002 on) which would be a wonderful to incorporate.
Dependent on speed, the M/Steer gets 0-5V signal from the BCU on these cars.
...
The electronic brake (and traction) control module (EBCM/EBTCM) controls a bi-directional magnetic rotary solenoid. The solenoid is located in the steering gear. The solenoid adjusts the amount of power steering assist in order to achieve a given level of driver effort in order to turn the vehicle. The EBCM/EBTCM varies the steering assist by adjusting the current flow through the solenoid. The amount of steering assist adjusted for steering is dependent upon vehicle speed.
As the vehicle speed increases, the following actions occur:
The steering assist decreases.
The steering wheel driver effort increases.
As the vehicle speed decreases, the following actions occur:
The steering assist increases.
The steering wheel driver effort decreases.
...
Since '88 Esprit speedometer is mechanical and a car does not have a CPU nor ABS computer, I can not get the speed signal to the M/Steer. Would you be able to recommend where to get a processor which can simulate or substitute BCU output for this one particular function, (i.e. vehicle speed/Volt range)?
Or... is it more complicated than I think?
Any thoughts would be appreciated.
Thank you
