| CHASSIS SET-UP FOR DIRT WORKS MODIFIEDS DW-3 thru DW-11 The following data is intended to be a GUIDE ONLY for initial set up on average track conditions.These figures & specifications are intended as a STARTING POINT ONLY and will require fine tuning for each driver and track condition. |
1. RECOMMENDED COMPONENTS
A. SHOCKS
AFCO & PRO CARRERA BILSTEIN
LF - 1074 RF - 1075 LF - 3174 RF - 3175 LF - 7M35/35 RF - 7M45/45
LR - 1094 RR - 1094 LR - 3194 RR - 3194 LR - 9Z30/30 RR - 9Z30/30
Wrap - 1079-1 Wrap - 3171-9 Wrap - 7Z10/90
A. SHOCKS
AFCO & PRO CARRERA BILSTEIN
LF - 1074 RF - 1075 LF - 3174 RF - 3175 LF - 7M35/35 RF - 7M45/45
LR - 1094 RR - 1094 LR - 3194 RR - 3194 LR - 9Z30/30 RR - 9Z30/30
Wrap - 1079-1 Wrap - 3171-9 Wrap - 7Z10/90
B. SPRINGS
FRONT (5"x9 1/2") : LF - 650 RF - 750
REAR (5"x13" or 16") : 2 Link LR - 200 RR - 175
4 Link LR - 200 RR - 175
2 Link Swingarm LR - 250 RR - 225
Z Link Swingarm LR - 300 RR - 275
Multi Leaf LR - 20230 RR - 20220
Mono Leaf LR - 20242LW RR - 20242LW
TORQUE LINK/PULLBAR : Biscuit Type - 65 Durometer * 15-17 degrees down
angle *
Spring Type - 2 Link : 750# or 400-1000 Progressive
4 Link : 1050# or 600-1200 Progressive
FRONT (5"x9 1/2") : LF - 650 RF - 750
REAR (5"x13" or 16") : 2 Link LR - 200 RR - 175
4 Link LR - 200 RR - 175
2 Link Swingarm LR - 250 RR - 225
Z Link Swingarm LR - 300 RR - 275
Multi Leaf LR - 20230 RR - 20220
Mono Leaf LR - 20242LW RR - 20242LW
TORQUE LINK/PULLBAR : Biscuit Type - 65 Durometer * 15-17 degrees down
angle *
Spring Type - 2 Link : 750# or 400-1000 Progressive
4 Link : 1050# or 600-1200 Progressive
C. WHEELS (15"x 8")
LF - 3" offset RF - 3" offset
LR - 3" offset RR - 4" offset
LF - 3" offset RF - 3" offset
LR - 3" offset RR - 4" offset
D. FRONT STEERING COMPONENTS
MOOG # AFCO #
Upper Ball Joint K772 20034
Lower Ball Joint K5103 20033
Drag Link (64-67) DS740 N/A
Drag Link (68-72) DS749 30274
Idler Arm (68-72) K5143 30260
Inner Tie Rod (DW3-DW7) ES403L 30241
Outer Tie Rod (DW3-DW7) ES 406R 30240
Sleeve (DW3-DW7) ES2004S 30233
Pinto Spindles 1974 to 1978
Granada Hubs 1975 to 1977
New Inner Tie Rod (DW8-DW9) ES370R 30201
(Uses 12"x 5/8" Tube with 5/8" LH Heim)
MOOG # AFCO #
Upper Ball Joint K772 20034
Lower Ball Joint K5103 20033
Drag Link (64-67) DS740 N/A
Drag Link (68-72) DS749 30274
Idler Arm (68-72) K5143 30260
Inner Tie Rod (DW3-DW7) ES403L 30241
Outer Tie Rod (DW3-DW7) ES 406R 30240
Sleeve (DW3-DW7) ES2004S 30233
Pinto Spindles 1974 to 1978
Granada Hubs 1975 to 1977
New Inner Tie Rod (DW8-DW9) ES370R 30201
(Uses 12"x 5/8" Tube with 5/8" LH Heim)
2. TIRE PRESSURE & STAGGER
Both of these should be set before scaling.Always use your race set up for scaling.
Dirt Works Recommendations:
IMCA-type Tire Pressure
LF - 10 psi RF - 14 psi
LR - 10 psi RR - 14 psi
IMCA-type Tire Stagger
FRONT - 0 to 1/2"
REAR - 1/2" to 1 1/2"
*** Other tires and track conditions may vary these settings ***
Both of these should be set before scaling.Always use your race set up for scaling.
Dirt Works Recommendations:
IMCA-type Tire Pressure
LF - 10 psi RF - 14 psi
LR - 10 psi RR - 14 psi
IMCA-type Tire Stagger
FRONT - 0 to 1/2"
REAR - 1/2" to 1 1/2"
*** Other tires and track conditions may vary these settings ***
3. FRAME HEIGHTS
(Based on 82" IMCA American Racer Tires.Add 1" to ride heights for UMP Hoosier tires)
Dirt Works Recommendations:
LF - 5 1/4" RF - 5 1/2"
LR - 6" RR - 6" to 6 1/2"
*** Other tires and track conditions may vary these settings ***
(Based on 82" IMCA American Racer Tires.Add 1" to ride heights for UMP Hoosier tires)
Dirt Works Recommendations:
LF - 5 1/4" RF - 5 1/2"
LR - 6" RR - 6" to 6 1/2"
*** Other tires and track conditions may vary these settings ***
4. WEIGHT PERCENTAGES
All scaling is done with 20 gals. to Full of fuel and without driver.
The standard DW modified should weigh 2250 to 2300 lbs.
Left % ....................51-52 %
Rear % ...................57.5-59.5 %
LR Bite ...................20 lbs
All scaling is done with 20 gals. to Full of fuel and without driver.
The standard DW modified should weigh 2250 to 2300 lbs.
Left % ....................51-52 %
Rear % ...................57.5-59.5 %
LR Bite ...................20 lbs
5. FRONT END ALIGNMENT (Set Before Scaling)
CASTER CAMBER
LF : +1 1/2 degrees +1 1/2 degrees
RF : +5 degrees -2 1/2 degrees
Toe : 1/8" to 1/4" OUT
CASTER CAMBER
LF : +1 1/2 degrees +1 1/2 degrees
RF : +5 degrees -2 1/2 degrees
Toe : 1/8" to 1/4" OUT
6. PINION ANGLE (Set Before Scaling)
2 Link , 4 Link , Z Link , Mono Leaf : 10 degrees down angle
Multi Leaf Springs : 5 to 6 degrees down angle
2 Link , 4 Link , Z Link , Mono Leaf : 10 degrees down angle
Multi Leaf Springs : 5 to 6 degrees down angle
| 417-465-2410 |
BEFORE SCALING YOUR DW MODIFIED
1. Install correct offset wheels & tires with the correct stagger.
2. Install the desired amount of fuel and check & fill all other liquids.
3. Set general frame heights on all corners : LF,RF,LR,RR as shown below.
1. Install correct offset wheels & tires with the correct stagger.
2. Install the desired amount of fuel and check & fill all other liquids.
3. Set general frame heights on all corners : LF,RF,LR,RR as shown below.
| 4. Square the rearend off the chassis tabs or punch marks on the upper rear frame rail with a plumbbob as shown below. |
| 5. Set the Panhard (J-Bar) to correct angle as shown below.Start with 8" high on frame side and level with the center of the yoke on the pinion side. |
| 7. Set the Front End alignment 8. Set Pinion Angle. |
| NOW YOUR CAR IS READY TO SCALE ** Remember when you scale your car ; to gain more RR bite,raise the RR & LF ride heights ; to gain more LR bite,raise the LR & RF ride heights. Always try to work all four corners at the same time (1 turn in LF,1 turn out RF,1 turn in RR,1 turn out LR)This will add or subtract bite without varying ride heights much. Left side and Rear percentages will not change when adjusting the weight jacks,these are static weights and can only change by adding or removing ballast. |
