Serpent S400 Guía del producto
SETUP BOOK
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CONTENTS
INTRODUCTION 3
BASIC SETUP 4
1. CASTER 4
2. TOE 5
3. DOWNSTOPS 6
4. SHOCK ABSORBERS 7
5. TRACK WIDTH 9
6. RIDE HEIGHT 9
7. CAMBER 11
8. ANTI-ROLL BARS 12
9. SUSPENSION TWEAK 13
10. DIFFERENTIAL ADJUSTMENT 15
All texts and images contained within this booklet are copyright of Serpent MRC ©2007
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2INTRODUCTION
Setting up a racecar with fully-independent suspension,
like your Serpent S400, is necessary to make the car
perform well. We have developed these straightforward
procedures to help you set up your car properly and easily.
Always follow these procedures step-by-step, in the order
presented, and always make sure that you make equal
adjustments on both left and right sides of the car.
These section describes the default settings for your
Serpent S400.
Setup Order
We have determined that you should set up your S400 in
the order indicated in the table below. The order of the
settings has been determined as the most logical to set up
your S400 properly and easily. Also, certain settings must
be made before others, as changing one setting will impact
another setting.
The table below gives you a breakdown of what components
need to be attached on the car, and what you will need to
measure the settings.
For example, to set the downstops:
· Detach the shocks.
· Detach the anti-roll bars.
· Remove the wheels.
· Use a setup system (downstop blocks & gauge)
· Use a at board.
(-/+)
(-)
(+) Attach or use this component / apparatus
DO NOT attach or use this component / apparatus
Component / apparatus may (+) or may not (-) be attached or used.
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BASIC SETUP
This section describes the default settings for the Serpent
S400 and how to adjust those settings. We strongly
recommend you thoroughly read this section so you
understand how the settings are adjusted.
The setup described here is a good starting point. After
rebuilding the chassis, or in case you become lost with your
setup, always return to the setup described here.
If you choose to adjust the settings to better suit different
track conditions, make small adjustments, one at a time,
and see if you nd any improvement in handling with each
adjustment. We advise you to keep track of your setup
changes, and record which setups work best at different
racetracks under various conditions.
1. CASTER
Caster is the forward/rearward angle of the front steering
block with respect to a line perpendicular to the ground.
Initial Steps
None
Setup Apparatus
None
1.1 SETTING FRONT CASTER
To change front caster you must change the C-hubs to
those of different caster values.
IMPORTANT!
You must use matched caster
blocks (same caster angle) on
both left and right sides of the
car.
Front Caster Default= 4º
To change the front caster
setting, replace the installed
caster blocks with those of the
proper caster angle.
2° 4° 6°
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42. TOE
Toe is the angle of the wheels when looked at from above
the car.
· Wheels parallel with the centerline of the car
have a toe value of 0°.
· Wheels that are open toward the front have a
negative toe value (toe-out).
· Wheels that are closed toward the front have a
positive toe value (toe-in).
Setup Apparatus
Measure and adjust front and rear toe using a setup system
on a at reference surface
IMPORTANT!
Make equal adjustments on both left and right sides of the
car.
2.1 MEASURING TOE
Measure front and rear toe using the setup system
according to the instructions provided with the setup
system.
2.2 SETTING FRONT TOE
Front Toe Default Setting = -0.5° (toe-out)
Adjust the front toe-out value
of each front wheel to –0.5°
(fronts of front wheels pointing
outward) by adjusting the
lengths of the front steering
rods.
· To set less toe-out,
LENGTHEN each steering
rod equally.
· To set more toe-out,
SHORTEN each steering
rod equally.
2.3 SETTING REAR TOE
Rear Toe Default Setting = +3.0° (toe-in)
The rear toe is adjusted by using different suspension
brackets at the front and back of the rear bulkheads.
The default setup uses a 0º bracket at the front, and the 3º
bracket at the back.
(These two brackets are included in the kit.)
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3. DOWNSTOPS
Downstops limit how far the suspension arms travel
downward (which determines how far upward the chassis
travels).
Downstops are a primary setup adjustment that affect other
setup adjustments.
IMPORTANT!
Make sure you adjust downstops equally on both left and
right sides of the car.
Initial Steps
A. Shocks: It is not absolutely necessary to remove the
shocks, however you must be sure they are long enough
not to limit the suspension travel. Be sure the suspension
is reaching the downstop limits before the shocks are
fully extended. Also ensure that there is not an excessive
amount of preload on the shocks, or the downstop values
may appear to be lower than actual.
B. Front anti-roll bar: Disconnect one ball-joint from the
front anti-roll bar
C. Rear anti-roll bar: Disconnect one ball-joint from the
rear anti-roll bar.
D. Wheels: Remove the wheels from the car.
Setup Apparatus
Check downstops using a downstop measuring set and at
reference surface
3.1 MEASURING DOWNSTOPS
Using the measuring gauge, measure the distance from
the reference surface to the lowest point of the front/rear
suspension arms.
· Positive numbers on the
gauge indicate the distance
(in mm) ABOVE the top
level of the elevating blocks
(or, above the bottom of
the chassis).
· Negative numbers on the
gauge indicate the distance
(in mm) BELOW the top
level of the elevating blocks
(or, below the bottom of
the chassis).
3.2 SETTING FRONT DOWNSTOPS
Front Downstop Default Setting = + 3mm
Set the front downstops so the bottoms of the lower
suspension arm are at +3mm on the gauge.
(Actual measurement = 3mm above top level of elevating
blocks, or 1mm above the bottom of the chassis).
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6Adjust front downstops by turning the front downstop
setscrews into or out of the front suspension arm.
· To increase the front
downstop value, turn IN (CW)
the front downstop setscrews
INTO the front suspension
arm.
· To decrease the front
downstop value, turn OUT
(CCW) the front downstop
setscrews OUT OF the front
suspension arm.
IMPORTANT!
Make sure you adjust front downstops so they are equal on
both left and right sides.
3.3 SETTING REAR DOWNSTOPS
Rear Downstop Default Setting = 4mm
Set the rear downstop screws so the bottoms of the rear
suspension arms are at +4mm on the gauge.
(Actual measurement = 4mm above top level of elevating
blocks, or 4mm above the bottom of the chassis).
Adjust rear downstops by turning the rear downstop
setscrews in or out of the rear lower arms.
· To increase the rear downstop
value, turn IN (CW) the rear
downstop setscrews INTO the
rear suspension arm.
· To decrease the rear
downstop value, turn OUT
(CCW) the rear downstop
setscrews INTO the rear
suspension arm.
IMPORTANT!
Make sure you adjust rear downstops so they are equal on
both left and right sides.
4. SHOCK ABSORBERS
Shock absorbers, or shocks, are the suspension
components that allow the wheels to keep as much contact
as possible with the track surface. The Serpent S400 has
fully-independent front and rear suspension, meaning that
the suspension at each corner of the car (front left, front
right, rear left, rear right) moves and may be adjusted
independently of the others. As such, there is a shock
absorber at each corner of the car.
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Damping, mounting position, spring tension, and spring
preload are all characteristics that determine how the
shock performs. The shock absorbers of the S400 must be
disassembled to change the shock oil and pistons in order
to alter the damping.
Initial Steps
A. Shocks: To adjust shock damping, remove the shocks
from the car by unscrewing the upper and lower shock
pivotballs. You do not need to disconnect the shocks to
adjust spring preload (for ride height adjustment).
Setup Apparatus
None
4.1 ADJUSTING SHOCK ABSORBER DAMPING
To adjust shock absorber damping, disassemble the shocks
and change the pistons or shock oil.
· To get softer damping, use a piston with more holes
or use thinner shock oil.
· To get harder damping, use a piston with less holes
or use thicker shock oil.
The standard setting for the S400 shocks is using a 3-hole
piston and 500cst shock oil
4.2 SETTING THE FRONT
SHOCK ABSORBERS – UPPER
MOUNTING POSITION
Front Shock Default Upper
Mounting Position = 2nd
HOLE FROM TOP
Attach the front shock upper
pivotball to the 2nd hole from
the top on the front shock tower.
4.3 SETTING THE FRONT
SHOCK ABSORBERS – LOWER
MOUNTING POSITION
Front Shock Default Lower
Mounting Position = OUTER
HOLE
Attach the front shock lower
pivotball to the outer hole on the
front lower suspension arm.
4.4 SETTING THE REAR
SHOCK ABSORBERS – UPPER
MOUNTING POSITION
Rear Shock Default Upper
Mounting Position = 2nd
HOLE FROM TOP
Attach the rear shock upper
pivotball to the 2nd hole from
the top on the rear shock tower.
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84.5 SETTING THE REAR
SHOCK ABSORBERS
– LOWER MOUNTING
POSITION
Rear Shock Default Lower
Mounting Position = MIDDLE
HOLE
Attach the rear shock lower
pivotball to the middle hole on
the rear lower suspension arm.
5. TRACK-WIDTH
Track-width is the distance between the outside edges of
the wheels, front or rear. It is important that front and rear
track-widths are adjusted symmetrically, meaning that the
left and right wheels (at one end of the car) must be the
same distance from the centerline of the chassis.
On a car with C-hub suspension the track-width is typically
not adjustable. But by using different wheel-hexagons with
different widths or by changing to different suspension
brackets, the car’s track-width will change as well.
When using the parts that come with the kit the S400 has a
track width of slightly less than 190mm.
Initial Steps
A. Shocks: Attach front and rear shocks.
B. Wheels: Mount all four wheels on the car.
Setup Apparatus
Measure track-width with the
car resting on a at measuring
surface or a at setup board
which has graduated markings
to measure track width.
5.1 MEASURING TRACK-WIDTH
Measure front track-width on the outside edges of the front
wheels.
Measure rear track-width on the outside edges of the rear
wheels.
6. RIDE HEIGHT
Ride height is the distance between the bottom of the
chassis and the reference surface on which the car is
resting. Adjust ride height with the car ready-to-run but
without the body.
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Initial Steps
A. Shocks: Connect front and rear shocks.
B. Anti-roll bars: Disconnect front and rear anti-roll bars.
C. Wheels: Mount a set of wheels/tires or mount our set-
up wheels
Setup Apparatus
Measure ride height with the
car resting on a at reference
surface (such as a at setup
board).
6.1 MEASURING RIDE
HEIGHT
Measure the ride height from
the very end points of the
chassis at the front and rear of
the car, using calipers or a ride
height gauge.
6.2 SETTING FRONT RIDE HEIGHT
Front Ride Height Default Setting = 5mm
Adjust front ride height by increasing or decreasing the
preload on the front shock springs.
· Increase front ride height by tightening the spring
preload collars on the front shocks (increasing the
preload).
This moves the collars DOWN the shock bodies.
· Decrease front ride height by loosening the spring
preload collars on the front shocks (decreasing the
preload).
This moves the collars UP the shock bodies.
6.3 SETTING REAR RIDE HEIGHT
Rear Ride Height Default Setting = 5mm
Adjust rear ride height by increasing or decreasing the
preload on the rear shock springs.
· Increase rear ride height by tightening the spring
preload collars on the rear shocks (increasing the
preload).
This moves the collars DOWN the shock bodies.
· Decrease rear ride height by loosening the spring
preload collars on the rear shocks (decreasing the
preload).
This moves the collars UP the shock bodies.
IMPORTANT!
Make equal adjustments on both left and right sides at each
end of the car.
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