12.0
Suspension
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Chassis Type A/B/C/D/S |
12.1 Chassis Type A/B//D/S
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Front suspension
- Lower control arms
- OEM G Body in stock location
- Howe and Johnson OEM permitted
- Ball Joints
- Approved Mono-ball is allowed. We reserve the
right to refuse Mono-balls at WTC's discretion
- Spindles
- Stock GM OEM in Stock location
- OEM replacement spindles allowed ( Must not change
geometry)
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Capitol CMS56318 -CMS56319
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Coleman steel spindle P/N 19975 or Coleman steel spindle
P/N 19976
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From the Coleman website:
For ease of ordering all spindle parts are sold
individually. To put together a complete spindle you
will need to order each part separately. You will need:
1-spindle upright, 1-steering arm, 1-brake bracket,
2-steering arm bolts and 2-brake bracket bolts for each
spindle. These spindles feature aluminum or steel
steering arms, gusseted steel upright, and steel caliper
brackets. The spindles are available in two heights:
Part number 19975 is referred to as 8″ but is actually
7-3/4″ tall.
Part number 19976 is referred to as 9” but is actually
8-1/2” tall.
Both have 10 degree spindle inclination with 3 3/4″
spindle pin height
- Non OEM
Steel Spindles add 25 lbs
- Steel
OEM pin adapter when converting to wide-five hubs.
- - 25 lbs ( 10 degree spindle
inclination and 3/3/4 spindle pin height must be
maintained.
- Must be reamed to same taper as ball joint
- Spindle savers recommended
- Steel OEM replacement spindles
using pin adapter when converting to wide-five hubs.
- Brake Caliper
- Upper A-Arms
- Steel
- Any length
- Non-adjustable
- Aluminum cross shafts allowed
- Hubs
- Heavy duty allowed / recommended
- Wide Five hubs add 75 lbs.
(Includes spindle penalty)
- Front Sway bar
- Any GM stock type front sway bar
- 1 piece
- Max 1 and 1/2 inches
- Tread width
- Supplied by team both front
and rear
- width must be recorded on
decal with weight penalty if any - pre race.
( Decal will be supplied)
- A/B C and D except Seekonk
Metric
- Minimum 73 inches measured from outside of rim to outside of
rim
- Max front and rear tread
width 74 inches
- Over maximum add 20 lbs per inch or 10 lbs per 1/2
inch
- Seekonk Metric minimum 70
inches
- Max front tread width 71 inches
- Over maximum add 20 lbs per inch or 10 lbs per 1/2
inch
- Bushings
- No eccentric bushings
- No non-factory adjustable devices allowed on the
suspension
- No devices are allowed that tie down, limit, or restrict
front suspension travel.
These include but are not
limited to Bump Stops, Coil Spring Binding, Chains, etc.
- Frame rail must be able to raise 3 inches without
rear wheel raising off ground.
- Rear Suspension (Does not include axle housing, gears,
axles, etc.)
- 4-link with all suspension points retained to
manufacturer specs.
(Must be able to pass inspection using Johnson Chassis
inspection tools
- 3 point Suspension
- Add 50 lbs.
- Lower trailing arm must
connect to chassis to stock mount in stock location
- C/D Chassis Add 25 lbs for altered front
mount
- Max trailing arm length 28.00
inches eye to eye.
- All links including Upper link
must be tubular with spherical rod ends or stock
- No springs, rubbers or other
design allowed.
- Upper link max 16.0 inches.
Add 10 lbs for every 1inche over.
Examples below include allowance
(16.251 - 17.250 add 10 lbs)
17.251 - 18.250 add 20 lbs)
- Rear tread width max 74 inches
- May not be wider than front
- If over add 20 lbs per inch or 5 lbs per 1/4 inch
- Bushings
- No eccentric bushings
- No non-factory adjustable devices allowed on the
suspension
- Upper mounts of rear end housing may use only swivel
bearing type
- No devices are allowed that tie down, limit, or restrict
the rear suspension travel.
These include but are not
limited to Bump Stops, Coil Spring Binding, Chains, etc.
- Rear Sway bar is not allowed
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- Springs Front & Rear
- Steel - Magnetic
- Jacking Bolts permitted at all four wheels
- May not be custom wound
- No coil over springs allowed
- No coil over eliminators allowed
- Must be mounted in stock location
- Minimum 5 inches
- Minimum front spring race 550 lbs
- Spring must be readily available for purchase for less
than $150.00
- S Chassis must use rear leaf springs
- Shocks Front & Rear
- Must mount directly to lower control arm
- 1 shock per wheel
- Must be readily available for purchase for $205.00
- Shock can be claimed by series or any competitor for
$230.00
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12.2 Suspension
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Chassis Type C
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- Front Suspension
- Lower Control Arms
- Must use factory mounts
- Unaltered
- Stock length
- Howe and Johnson OEM permitted
- Spindles
- OEM replacement spindles allowed ( Must not change
geometry)
- Non OEM
Steel Spindles add 25 lbs
- Steel
OEM pin adapter when converting to wide-five hubs.
- Upper A-Arms
- Steel
- Any length
- Non-adjustable
- Aluminum cross shafts allowed
- Hubs
- Heavy duty allowed / recommended
- Wide Five hubs add 75 lbs.
(Includes former spindle penalty)
- Steel OEM replacement spindles
using pin adapter when converting to wide-five hubs. - 25 lbs
Tread width
- Supplied by team both front and rear
- width must be recorded on
decal with weight penalty if any - pre race.
( Decal will be supplied)
- A/B C and D except Seekonk Metric
Minimum 73 inches measured from outside of rim to outside of
rim
- Max front and rear tread width
74 inches
- Over maximum add 20 lbs per inch or 10 lbs per 1/2
inch
- Bushings
- No eccentric bushings
- No non-factory adjustable devices allowed on the
suspension
Ball Joints
Restrictive devices
- No devices are allowed that tie down, limit, or restrict
front suspension travel.
These include but are not
limited to Bump Stops, Coil Spring Binding, Chains, etc.
Rear Suspension ( Does not include axle housing, gears,
axles etc.)
- May not be wider than front
-
3 point Suspension
- Add 50 lbs.
- Lower trailing arm must
connect to chassis to stock mount in stock location
- C/D Chassis Add 25 lbs for altered front
mount
- Max trailing arm length 28.00
inches eye to eye.
- All links including Upper link
must be tubular with spherical rod ends or stock
- No springs, rubbers or other
design allowed.
- Upper link max 16.0 inches.
Add 10 lbs for every 1inche over.
Examples below include allowance
(16.251 - 17.250 add 10 lbs)
17.251 - 18.250 add 20 lbs)
Bushings
- No eccentric bushings
- No non-factory adjustable devices allowed on the
suspension
- Upper mounts of rear end housing may use only swivel
bearing type
Front Sway bar
- Any GM stock type front sway bar
- 1 piece
- Max 1 and 1/2 inches
Rear Sway bar is not allowed
Springs
- Steel - Magnetic
- Jacking Bolts permitted at all four wheels
- May not be custom wound
- No coil over springs allowed
- No coil over eliminators allowed
- Must be mounted in stock location
- Minimum 5 inches
- Minimum front spring race 550 lbs
- Spring must be readily available for purchase for less
than $150.00
Shocks
- Must mount directly to lower control arm
- 1 shock per wheel
- Must be readily available for purchase for $205.00
- Shock can be claimed by series or any competitor for
$230.00
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