Product Description
2016 Model DSS-3 DYNAMIC SCALING SYSTEM WITH INTEGRATED LOAD CELLS; 10” TALL* BILLET ALUMINUM SCALE
STANDS WITH LEVELING FEET; TRIPLE ELECTRIC PULL DOWN CYLINDERS; VARIABLE SPEED JOYSTICK CONTROLS;
ROLLING CONTROL CART AND SCALE DISPLAY WITH STORAGE
System Includes:
(4) Billet Aluminum Scale Stands, 10” Tall, with Dual Load Cell, 4500 lb Capacity High Load Scales
(4) Teflon® Slip Plates (One for each wheel)
(1) Control Cart with Variable Speed Joystick Controls and Power Supply
(3) 12VDC Electric Pull/Push Cylinders; 8” Stroke with Adjustable Beam Mounts & Travel Stops
(1) Portable Beam Kit
Choice of Quick Release Scale Roll Off Platforms or Ramp System
DSS Analysis Software Instruction Manual (1) Day Training (Travel Not Included) Chassis Mounts Not Included. Select below.
***Choose one of the following Chassis Mount Kits(1 Kit inluded)***
 |
WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov |
PD20525 Add NASCAR PERIMETER CHASSIS HOOK UP KIT
Use this kit on NASCAR style chassis with 3”x4” vertical frame rails and 4 bolt NASCAR pattern. Fits most CUP, Nationwide, Truck, ARCA
& K&N chassis.
Includes: (3) Adjustable 4 Bolt Vertical Frame Mounts (3) 4 Bolt Frame Caps (3) Quick Pins & Hardware
PD20530 Add STRAIGHT RAIL ASPHALT CHASSIS HOOK UP KIT
Add this kit for straight rail asphalt late models and modifieds.
Includes: (1) Round Tube Chassis Clamp for Left Front (2) 2”x3” Clamp-on Adjustable Frame Mounts for Right Front & Right Rear (3)
Cylinder Caps & Ends (2) Quick Pins & Hardware
***System Options***
PD20450 Add Scale Roll Off Kit $2400
Includes: (4) Billet Aluminum & Stainless Steel Scale Roll Off Platforms with quick release mounts for easy detachment. Roll offs often
need to be detached on some corners for pull down cylinder clearance.
90400P Add RS400PRO DYNAMIC WHEEL MEASUREMENT KIT $3400
Add this kit to measure wheel locations throughout suspension travel. Measures individual wheel toe, bump, caster, camber, rear steer,
tread width change, rear lateral movement, ackermann, wheel base and more.
Specify chassis and hub style.
PD20900 Acceleration/Deceleration Load Kit $2650
Add this kit to measure acceleration and deceleration loads. This is a necessary kit for most dirt applications. Attachment applies
acceleration or deceleration torque to the rear end housing, loading trailing arms, top link (pull bar), lift arm, etc. User is able to measure
increase or decrease in rear wheel load, effectively measuring forward bite. Kit includes: Set of (4) DSS scale stand mounts, (1)
Acceleration Beam (1) Acceleration Cylinder (1) Cylinder Beam Mount (1) Quick Change Rear End Mount Kit (2) Acceleration Struts (2)
Strut Beam Mounts (2) Strut Chassis Mounts
PD22000 Data Acquisition Kit with Travel Display $5500
This kit integrates a fully functional data acquisition system with shock travel display built into the control panel. Data system easily
removes and mounts inside vehicle to record on track shock travel, steering position, GPS track mapping, RPM, G-Loads, Shock Velocity
and more. Includes: (4) Shock Sensors and (1) Steering Sensor
See Data Acquisition page for data acquisition sensor options
PD22100 Data Acquisition Kit with travel Display and Automatic Wheel Load Graphing $7200
This kit integrates a fully functional data acquisition system with shock travel display built into the control panel. Data system easily
removes and mounts inside vehicle to record on track shock travel, steering position, GPS track mapping, RPM, G-Loads, Shock Velocity
and more. PLUS a recording feature to record wheel loads as you pull the vehicle down. After pull down, software automatically graphs
wheel loads and shock positions.
PD20860 Add CYLINDER LOAD CELL OPTION $1575
This option adds load cells to each cylinder allowing the user to measure the amount of force required to move chassis (suspension rate).
Requires Data Acquisition Kit.
PD21800 Ground Plane Laser Kit $800
This is a high quality system with self leveling laser, adjustable height laser stand and high visibility magnetic frame rulers. Use this kit
to quickly level your system and provide instant frame height measurements. Laser quickly identifies any portion of the chassis that falls
below ground level. Laser will also project vertical beam.
BENEFITS OF DYNAMIC SCALING TECHNOLOGY:
MEASURE VEHICLE KINEMATICS
BY MOTIONING THE CHASIS TO ACHIEVE ON TRACK WHEEL TRAVEL, THE USER IS ABLE TO ACCURATELY SIMULATE SUSPENSION STATES AND MEASURE SUSPENSION CHARACTERISTICS SUCH AS BUMP STEER, ACKERMAN, REAR STEER, CAMBER, CASTER, WHEEL BASE, WHEEL ALIGNMENT AND MORE. THESE MEASUREMENTS CAN BE TAKEN THROUGHOUT THE TRAVEL RANGE AND GRAPHED USING THE DSS ANALYSIS SOFTWARE. MEASUREMENTS ARE FAR MORE ACCURATE THAN TRADITIONAL MEANS (JACKING ONE SUSPENSION SIDE), DUE TO THE SUSPENSION BEING MOTIONED THE WAY IT MOVES ON THE TRACK (CHASSIS COMPRESSING, WHEEL STAYS ON TRACK) AND THE SUSPENSION BEING UNDER FULL LOAD.
MEASURE DYNAMIC WHEEL LOADS
MEASURING CORNER WEIGHTS AND PERCENTAGES ARE A FOUNDATIONAL BASIC FOR CHASSIS SET-UP. WITH DSS TECHNOLOGY, YOU CAN NOW ACCURATELY MEASURE CORNER WEIGHTS AND PERCENTAGES "ON THE TRACK", ALLOWING THE USER TO IDENTIFY PROBLEMS AND TRACK VEHICLE BALANCE THROUGHOUT THE SUSPENSION TRAVEL RANGE. WITH BASIC DATA ACQUISITION , YOU CAN SIMULATE AN ENTIRE LAP, TRACKING ALL MEASUREMENTS SIMULTANEOUSLY. DYANMIC WHEEL LOAD DATA IS ESPECIALLY IMPORTANT FOR ACCURATELY TESTING AND SETTING UP BUMP STOPS AND COIL BIND. GRAPHING WHEEL LOADS ALLOW THE USER TO PICK UP SUSPENSION BIND SUCH AS SWAY BARS, SPRINGS OR BALL JOINTS.
TEST SET-UP IDEAS
ONCE WHEEL LOAD BASELINES ARE ESTABLISHED FOR A GIVEN TRACK , THE USER CAN ACCURATELY PREDICT SUSPENSION TRAVEL WITH ANY SET-UP COMBINATION. THIS ALLOWS THE USER TO ELIMINATE WASTED TRACK TIME DUE TO THE CHASSIS BOTTOMING OUT OR SUSPENSION BINDING. SUSPENSION COMPONENT CHANGES CAN BE TESTED IN THE SHOP, WITH ACCURATE OUTCOME PREDICTIONS. EXAMPLES: MAKE A SPINDLE CHANGE AND SEE THE CAMBER CHANGE, CASTER CHANGE, BUMP CHANGE AND WHEEL LOAD VARIATION THROUGHOUT THE TRAVEL RANGE. MAKE A SPRING CHANGE AND SEE WHAT OFFSETTING ADJUSTMENTS MUST ALSO BE MADE.
TYPES OF STANDARD TESTS:
WHEEL LOAD VS TRAVEL
USING MAX TRAVEL DATA , THE SUSPENSION IS COMPRESSED AND WHEEL LOADS ARE MEASURED AT UP TO 25 POINTS THROUGH THE TRAVEL RANGE. TYPICAL MEASUREMENTS ARE TAKEN EVERY 1/4" OF TRAVEL.
WHEEL POSITION VS TRAVEL
THIS TEST MAY BE RUN SIMULTANEOUSLY WITH THE WHEEL LOAD VS TRAVEL TEST. IT MEASURES TOE (BUMP), CAMBER, CASTER, REAR STEER, CONTACT PATCH ALIGNMENT AND MORE.
CORNER (LAP) SIMULATION
USING BASIC DATA ACQUISITION, THE VEHICLE TRAVEL DATA IS USED TO CREATE A TEST SIMULATING UP TO 25 POINSTS. THIS TEST MAY BE FOR A SMALL SECTION OF THE TRACK SUCH AS CORNER ENTRY OR FOR A FULL LAP. ALL MEASUREMENTS MAY BE TAKEN AND GRAPHED SHOWING THE USER EXACT CAR STATES THROUGHOUT THE CORNER.
COMPONENT CHANGE
THIS TEST IS USED TO GRAPH THE DIFFERENCE(S) OF ANY SUSPENSION COMPONENT CHANGE. A BASELINE TEST IS RUN VS TRAVEL OR VS WHEEL LOAD, THEN THE SUSPENSION COMPONENT IS CHANGED (THIS COULD EVEN BE A HOOK-UP POINT ADJUSTMENT) AND THE TEST IS RUN AGAIN. RESULTS ARE INPUT INTO DSS ANALYSIS SOFTWARE AND TESTS ARE GRAPHED. UP TO 20 TESTS CAN BE PLOTTED ON THE SAME GRAPH.
How to Use Your Pull Down Fixture for Performance Gains
Asphalt Chassis
- Use the fixture to establish your “track height”. This is the desired attitude (travel & roll) of the chassis on the track. Be sure to allow for tire roll clearance. 3/8” at the cross member & ¾” at the nose.
- Adjust your spring/bump stop combination to reach the needed wheel loads at your track height. This is where you will set your bump stop timing, choose primary spring rates, bump stop rates and shims. During this process, you will watch wheel load curves and make sure you are not “spiking the load” causing grip loss.
- The first two steps will eliminate chassis over traveling and track contact, causing grip loss.
- Now that you know where the car will travel to, you can adjust dynamic balance. This is where the sway bar comes in. Move sway bar load (more roll/Stiffer Bar/softer RF) will increase dynamic cross. Less bar load will decrease cross.
- Next, adjust the dynamic bite through acceleration while maximizing total forward traction. (You need the acceleration kit for this.) Adjust trailing arm angles, top link positioning, etc.
- Through these five steps, you can test any combination of set-ups. You will see how they change your travel, know what travel adjustments to make and see how they affect dynamic balance. Through testing, you will know what your optimum dynamic balance is for each track.
- Different style tracks will produce different wheel loads. You will determine the wheel load for each track by testing, measuring chassis travel and then pulling the car down to that travel. Once you have the wheel loads recorded for each track, you can test set-ups for each track all year long. You will notice higher wheel loads in qualifying and be able to adjust travels for that easily.
- Next you will study your dynamic wheel positions. You will measure bump steer on both front wheels. Your will measure the dynamic camber and caster. You will measure caster jacking to see the affect it has on your chassis’ balance through steer. You will measure rear steer and lateral rear end movement. You will measure the contact patch alignment change from static to track height. Knowing these measurements, you will be able to make handling and grip adjustments accurately without affecting other areas of the chassis.
- You will watch for suspension binds as you travel the chassis under load and correct them.
- You will find bent items (spindles, axle tubes, control arms, etc.) and correct them.
- You will ensure that the chassis moves freely under load and repeats itself.
- Finally, you will compare set-ups and other chassis to identify unique characteristics that can be reproduced.
- Ultimately, the pull down fixture will allow you to fine tune set-ups and develop new set-ups for an advantage. It will eliminate time consuming errors at the track, costing you valuable practice time. It will help uncover chassis problems that cause performance loss far quicker than visual methods. And it will increase your knowledge of the chassis and suspension tremendously without excessive test days at the track.
|
WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov |
