Transcript Shocks, dampers, and springs

Joe Filomeno
George Lapaan
AJ Spagnoletti
Matt Tucker
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1. The car must be equipped with a fully operational
suspension system with shock absorbers, front and
rear, with usable wheel travel of at least 50.8 mm (2
inches), 25.4 mm (1 inch) jounce and 25.4 mm (1 inch)
rebound, with driver seated. The judges reserve the
right to disqualify cars which do not represent a
serious attempt at an operational suspension system or
which demonstrate handling inappropriate for an
autocross circuit.
2. All suspension mounting points must be visible at
Technical Inspection, either by direct view or by
removing any covers.
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Working gas must be nonflammable (nitrogen)
The gas cylinder/tank must be of proprietary manufacture,
designed and built for the pressure being used, certified by
an accredited testing laboratory in the country of its origin,
and labeled or stamped appropriately.
The pressure regulator must be mounted directly onto the
gas cylinder/tank.
The gas cylinder/tank and lines must be protected from
rollover, collision from any direction, or damage resulting
from the failure of rotating equipment and cannot be in the
cockpit.
The gas cylinder/tank must be securely mounted to the
Frame, engine or transmission.
The axis of the gas cylinder/tank must not point at the
driver
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Modeled the car with a
quarter car model
Equations of Motion:
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Frame
A-Arms
Rocker
Push Rod
Shock
Spring
Sway Bar
Video
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Ohlins DB-1 Damper
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200mm free length
57mm stroke
4way adjustable with independent high
and low speed adjustments for
compression and rebound.
Small diameter, twin tube design
Nitrogen gas charge in external reservoir
Adjustable spring preload
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Ohlins Spring Kit
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Includes 16 springs
4 x 150lb/in
4 x 175lb/in
4 x 200lb/in
4 x 225lb/in
Other spring rates available but sold
separately
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FOX DHX RC4
- .99 lbs (without reducers or spring)
-Externally adjustable velocity sensitive
damping(DSC)
-High speed compression
-Low speed compression
-Bottom-out progressiveness
-Rebound
-Coil Spring preload
-7.875 in eye to eye, 2.25 inch stroke
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FOX 300 lb to 600 lb springs (50 lb increments)
Other spring rates available but require
different sized shocks
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Push rod and rockers will be required
Will require frame geometry
Will work with frame on this
Yanelle
Push Bar
Rocker
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Will design sway bar
Implementation of sway bar pending on
handling of car without one
Once rockers are designed, sway bar will be
designed
OHLINS
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$610 per damper
$175 for spring kit
$30 per additional
spring
Total = ($610*4)+$175 =
$2615
Running Cost = ($610*4)
+ ($175/16)*4 =
$2483.75
FOX DHX RC4
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$585 per spring and
damper
Total = $585*4 = $2340
Running Cost= $2340