TROUBLE SHOOTING
#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. Heim 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. RF 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 stiffer
7. RF compound needs to be harder
*NOTE* CHECK AND MAKE SURE RR OR LR IS NOT COMING LOOSE
#7. TIRES - ALL HOST MUST BE GLUED TO WHEELS. NO LOOSE EDGES ON BANDS.
*NOTE* NOTHING WORKS IF THIS IS NOT DONE!
PREFERRED COMPOUNDS:
1. RF - extra firm host - compound 530 split
2. LF - 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 the corner. The car 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 wear 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 PUSH
SHORTENING WILL MAKE THE CAR TURN MORE
3. RR or LF Shock's Ride Height needs to be moved up or lowered.
MOVING 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.
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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 / 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 straight forward.
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"
