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After installing a new power steering pump with a pulley system and hydroboost. I installed a pressure gauge to find the pump making 800 psi under load and 1100psi at full lock. The hydroboost working perfectly but the steering was still very weak.
The Crown Vic rack has a VAPS Variable Assist Power Steering system that allows full power steering at idle and it pulls power out of the steering as speed increases. Unfortunately without the pwm input from the crown vic ECU. The rack and pinion assumes your cruising at 119mph and you don't want full power assist. I have made a simple controller that gives you control of of the power steering rate. From way to much to not enough.
After installing a new power steering pump with a pulley system and hydroboost. I installed a pressure gauge to find the pump making 800 psi under load and 1100psi at full lock. The hydroboost working perfectly but the steering was still very weak.
The Crown Vic rack has a VAPS Variable Assist Power Steering system that allows full power steering at idle and it pulls power out of the steering as speed increases. Unfortunately without the pwm input from the crown vic ECU. The rack and pinion assumes your cruising at 119mph and you don't want full power assist. I have made a simple controller that gives you control of of the power steering rate. From way to much to not enough.
https://www.amazon.com/Unique-Goods-...s=pwm+stepless this is what I used i hooked it up to 12v ignition so it is on with the ignition. Its a simple 4 wire setup voltage in pwm out. Wired straight to the two connector on the motor. LB/YE is the positive LG/BK is negative. I cut the switch off of the controller and jumped the wires so it is always on. I may replace the potentiometer with resistors once I find the sweet spot.
This is all in theory, since I've never seen anyone do this when doing a CV swap but, I suspect with some research into this, it MAY be possible to have the VAPS (Variable Assist Power Steering) system fully operational when putting a CV front suspension in an older Ford truck.
The VAPS module (pictured below) is a stand-alone unit that mounts either behind or beside the glove box of the '03-2011 Crown Vics. I suspect the only other component that would be needed to make this work is a VSS (Vehicle Speed Sensor), driven off the transmission, to send the sine wave signal to the VAPS module to oscillate the PS control valve on the R&P unit, depending on how fast the vehicle is moving.
IF you wanted the variable power steering function to work as it did in the original CV application, it would be interesting to research the feasibility IF this would in fact work.
That vss would be sweet if it would bolt into my c-6 and I could attach my speedo cable to the end of it. Then I could run the flexolite fan controller that cuts fan power at a set speed!
I just checked All Data. The VSS connects to the ecu. The signal from the ecu to the VAPS is sent on the CAN network. The VAPS basically gets the same connections as the pwm controller other than a 12v constant. The ecu processes the VSS and other inputs on the crown vic then sends a signal via the CAN. I'd still like a VSS that I could install inline of the speedo cable! If anyone runs across one!
That vss would be sweet if it would bolt into my c-6 and I could attach my speedo cable to the end of it. Then I could run the flexolite fan controller that cuts fan power at a set speed!
I'm fairly certain the speedometer cable bore diameter on the side of the C-6 tail housing is the same as a C-4, which is the same as a T-5, AOD, AODE or 4R70W transmission, etc. The interchangeable speedometer driven gear on the end of the speedometer cable should work as well.
It would be a matter of figuring out a mechanical speedometer cable to use in conjunction with the VSS, or, the speedometer (aftermarket gauge installation) could be electric and driven off the VSS without a speedometer cable or, the speedometer could be a GPS unit, also without a mechanical driven speedometer cable.
Part number E9TZ9E731A excepts a push in speedo cable and has a connection for a 2 terminal pigtail. I suppose a custom speedo cable could be made by Dick's Speedotach. Does fit all the trannys listed above.
This is a VSS I removed from a 1998 3.8L Mustang 4R70W electronically-shifted 4-spd overdrive transmission that I'm rebuilding to go into my F100 ....but, that's another story....
It's probably hard to tell from the photo but, the hole is blocked off by the white plastic object so that a mechanical cable is not used in conjunction with this VSS. It sends the speed signal to the ECU/PCM to operate the speedometer and to control the shifting of the transmission in its original application.
Somewhere around my shop, I have another VSS for a T-5 manual 5-spd overdrive transmission from a 1990 Fox 5.0L Mustang GT. It not only has the two-wire electrical connector but it also has a mechanical speedometer cable going to it so, the VSS does come configured either with or without mechanical speedometer cables.
Late model Mustang suppliers and various other suppliers have the VSS available brand new for use with a mechanical speedometer cable from Late Model Restoration.com .
Part number E9TZ9E731A excepts a push in speedo cable and has a connection for a 2 terminal pigtail. I suppose a custom speedo cable could be made by Dick's Speedotach. Does fit all the trannys listed above.
As I added to yours above in my reply.......
E9TZ9E731A.....with cable and mechanical odometer.
E9LZ9E731A.....without cable connection and with digital odometer/speedo.
E9TZ9E731A ..... with cable and mechanical odometer (MotorcraftDY-587)/ Available from Ford ~ MSRP: $44.04 - Dealer net cost: $24.22 / autonationfordwhitebearlake.com price: $26.64.
E9LZ9E731A.....without cable connection and with digital odometer/speedo (MotorcraftDY-588).
Available from Ford ~ MSRP: $59.96 - Dealer net cost: $32.98 / autonationfordwhitebearlake.com price: $36.28.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
Yepper. Looks like we are!
