Traxxas 56087-1 - Manual (Page 20)

20 • E-REVO BRUSHLESS
90mm Travel
Dot Color Spring Rate
Yellow 14.8 lb/in (2.6 N/mm)
White 16.6 lb/in (2.9 N/mm)
(Standard Front)
Orange 18.3 lb/in (3.2 N/mm)
Green 20.0 lb/in (3.5 N/mm)
(Standard Rear)
Gold 21.7 lb/in (3.8 N/mm)
Tan 23.4 lb/in (4.1 N/mm)
Black 25.1 lb/in (4.4 N/mm)
120mm Travel
Dot Color Spring Rate
Silver 28.0 lb/in (4.9 N/mm)
(Standard Front)
Pink 30.8 lb/in (5.4 N/mm)
Blue 33.7 lb/in (5.9 N/mm)
(Standard Rear)
Purple 36.5 lb/in (6.4 N/mm)
Note: 90mm Travel springs are
not recommended for use with
the Long Travel Rockers.
BASIC TUNING ADJUSTMENTS
This tuning and setup guide is separated into two sections- Basic and
Advanced. E-Revo does not require any specialized knowledge or
understanding of its unique suspension and drive train to perform
typical, everyday setup and track tuning adjustments. Adjustment
procedures for alignment, spring rate, damping, steering, and ride
height are covered in the basic tuning section. Adjustments for the
gear ratio, two-speed shift point, slipper clutch, and brake are also
covered. In most cases, the basic information is all that is needed to
tune E-Revo to perform well on a variety of surfaces.
E-Revo was engineered to provide sophisticated additional tuning
options well beyond the basics that allow expert users to extract
the maximum performance from the truck. The advanced tuning
section (beginning on page 27) covers topics such as optional
suspension rockers, roll center adjustment, caster adjustment, bump
steer tuning, differential setup, and fine tuning the two-speed
gear ratios. Make sure you fully understand the basic adjustments
before experimenting with the advanced adjustments. Improper
combinations of adjustments can adversely affect the performance of
the truck, resulting in poor handling. If you don’t know why you are
changing an adjustment then you should leave it at its factory setting.
Also included are instructions for using the Long-Travel rockers and
springs supplied with E-Revo. The long travel rockers allow extreme
suspension travel for rock crawling and rough, large-scale terrain. The
long travel rockers allow the suspension to operate at its extreme
mechanical limits and is recommended for advanced users.
SUSPENSION TUNING
Springs
The front and rear springs on E-Revo have different spring rates. The
rear springs are about 20% stiffer than the front springs. The
spring’s pre-load tension can be adjusted by turning the spring
pre-load adjuster. Adjusting the pre-load changes the suspension
sag. Suspension sag basically defines how much the suspension
compresses when the truck is at rest. Adjust the pre-load so that the
suspension compresses about one third of its full suspension travel
(see illustration). If suspension sag is severe and requires a large
increase of the spring pre-load to compensate, then a firmer spring
should be used. Firmer springs (supplied) must be used when the
Long Travel rocker arms are installed.
Use a stiffer spring to reduce sag, reduce body lean, control brake
dive, and provide a firmer, more responsive overall feel. If E-Revo is
lightened significantly
for racing applications,
softer springs will be
necessary to allow
the suspension to
sag properly. Heavier
configurations will
require stiffer springs.
Ride height is adjusted
by changing the length
or position of the
pushrods in the lower
suspension arms. See
the next section for ride
height adjustments. The suspension sag and spring pre-load should
be readjusted anytime the springs are removed and/or replaced.
Optional springs available from Traxxas are listed below. Refer to your
parts list for a complete part number listing. Higher rate springs are
stiffer. Springs can be identified by dots of color on one end.
Ride Height Adjustment
The rocker arm suspension uses push rods on each suspension arm.
Changing the length and/or position of the push rod adjusts the
ride height without affecting or compromising other suspension
parameters. For example, you can raise and lower the ride height
without changing up/down travel distribution, changing springs, or
affecting your progressive rate. This feature is unique to E-Revo and is
extremely beneficial in a racing environment where you can achieve a
low center of gravity (by lowering the ride height) without losing any
suspension capability. Increasing the ride height will increase ground
clearance for rough terrain.
Compression 2/3
Sag (Droop) 1/3
Ride Height
Total
Tr
ave
l
Axle Centerline at Ride Height
Axle Centerline at Max Compression
Axle Centerline at Max Sag