#1. WILL
NOT TRACK STRAIGHT
(a) Check the toe on the front end or rear of the
car.
(b) Something could be binding, not letting the
steering return to center.
Examples:
1. Helm end binding up
2. Steering rack binding
3. Servos in a bind
4. Worn out servo savers
If car goes
about half way down straight of way and the car starts turning left -
check RR
band. Could be coming loose or host tire could be separating.
#2. HOOKS
OFF CORNER
Check for the following:
1. Steering could be binding. (Heim or rack)
2. RF host tire is too soft.
3. RF compound is too soft.
4. RF tire has too much camber.
5. RF spring is too weak.
6. RR spring is too stiff
7. RR band is coming loose.
8. RR compound could be too hard.
9. RR tire does not have enough camber.
#3. THE CAR ’S LEFT FRONT TIRE PICKS UP
Check
for the following:
1. RF tire compound is too soft.
2. RF or LR spring is too stiff
3. RR spring is too weak.
4. RF or RR tire has too much camber.
#4. PUSHING = THE CAR WILL NOT TURN GOOD IN CORNERS
Possible adjustments:
1. RF spring needs less pressure
2. RF tire needs more camber
3. RR spring need to have more pressure or a stiffer
spring
4. Rear tires need more stagger
5. RF compound needs to be softer
6. RR compound needs to be harder
#5. PUSH\
LOOSE CONDITIONS = WHEN THE CAR HAS A SLIGHT PUSH
GOING IN
THE CORNER AND A SLIGHT PUSH COMING
OFF UNDER
ACCELERATION
THEN BREAKS LOOSE.
*NOTE* NEED
TO MAKE CAR TURN MORE IN CENTER OF CORNER
REFER TO SECTIONS: #4) PUSHING #8) STAGGER
#9) TIRE TIP
#6. LOOSE =
WHEN YOU CANNOT KEEP BACK END OF CAR
FROM
PASSING THE
FRONT END
Possible adjustments:
1. RE tire needs less camber
2.
RR tire needs more camber
3. RR spring is too stiff
4. RR shock’s ride height needs to be raised
1/8”
5. RR compound needs to be softer
6. RF compound needs to be suffer
7.
RF compound needs to be harder
*NOTE*
CHECK AND MAKE SURE RR OR LR IS
NOT COMING LOOSE
#7. TIRES -
ALL HOSTS MUST BE GLUED TO WHEELS.
NO LOOSE EDGES
ON BANDS.
*NOTE*
NOTHING WORKS IF THIS IS NOT DONE!
PREFERED
COMPOUNDS:
1. RF- extra firm host - compound 530 split
2. L~ - soft host - compound 310
3. LR - soft host - compound 310
4. RR - medium, firm host - compound 320, 400,
410 or 420
#8. STAGGER
= DIFFERENCE IN CIRCUMFERENCE OF LR TIRE
(SMALLER)
VERSES RR TIRE (BIGGER). THE MORE STAGGER, THE
MORE THE CAR WILL TURN IN THE CENTER OF CORNER CARE
WILL BE
LOOSER GOING IN AND COMING OFF THE
CORNERS.
#9. TIRE
TIPS
(a) If you start off with a car turning or it has
a slight push, and after 50 laps
or so it
starts getting loose - it’s probably 1 or 2 things.
1. RF
compound is getting hot and sticky. It’s biting more which upsets the
chassis
2. RR
compound is getting too hot and giving up. If RR tire grains, you will be
riding on
the grain, making the car unstable.
To adjust one or the other, you need to
change the compound on tires.
#10. FINE TUNE ADJUSTMENTS
Basically, you want to have even worn across the tire. If the RR wears a
little
on the
inside, that’s OK. If RF wears a little to the inside or the outside, it’s OK.
TO FINE TUNE A CAR :
1. RR Lower Track Bar needs to be lengthened or
shortened.
LENGTHENING WILL TIGHTEN THE CAR
UP
SHORTENING WILL MAKE THE CAR
LOOSE
2. RF
Upper Heim End needs to be lengthened or shortened
LENGTHENING WILL MAKE THE CAR
P USH
SHORTENiNG WILL MAKE THE CAR
TURN MORE
3. RR or LF Shock’s Ride Height needs to be
moved up or lowered
MO VING
SHOCK’S RIDE HEIGHT UPWARD ON RR OR LF WILL
TIGHTEN THE
CAR UP COMiNG OFF THE CORNERS.
LOWERING SHOCK’S RIDE HEIGHT WILL MAKE THE CAR
LOOSER IN AND OFF THE CORNER.
CHASSIS SET-UP & TROUBLE SHOOTING
CAMBER =
AMOUNT OF TILT IN TIRES
The top of all
four tires should be to the left of the car. On a flat surface half of the tire
should
touch the surface, as a starting point.
TOE IN I
TOE OUT = DISTANCE BETWEEN FRONT AND
BACK OF
FRONT TIRES
AND REAR TIRES
The front
of the front tire should be wider that the rear of front tires by 1/16” toe-in
per side.
Check this with a long straight edge against the side of the rear tire pointing
straightforward.
RIDE HEIGHT
= THE HEIGHT THAT YOU SET THE SUSPENSION
GEOMETRY
FRONT END -
With suspension suspended, adjust the shock height to where the
lower
control arms are parallel with the bottom of the frame.
NOTE: CHECK
SWAY BAR, MAKING SURE IT IS NEUTRAL. (NO PRESSURE ON
REAR
ADJUSTING LINKS)
REAR RIDE
HEIGHT - Collapse chassis in rear to ground Adjust shock height to
where the
shock lacks 1/16” to 1/8” of bottoming out.
SPRING
TENSION - AMOUNT OF PRESSURE ON SPRING
LF -20 to
25 lbs. spring with collar sitting on spring top, collapse 1/4” to 3/8”
RF - 12 to
16 lbs. spring, collapse 3/8” to 1/2”
LR - 7 to 8
lbs. spring, collapse 1/2” to 5/8”
RR -22 to
29 lbs. spring, collapse 0 to 1/8”
