• Front A/B D S S-Metric
  (For C type Riverhead Chassis Scroll down)
  
  • 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)
      • Capitol CMS56318 -CMS56319
      • Coleman steel spindle P/N 19975 or Coleman steel spindle P/N 19976
      • 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 using pin adapter when converting to wide-five hubs permitted.
      •  ( 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
    • Camber
      • NHIS only
        • More positive than -5.0 Right Front Max negative with 0.5 allowance
          (-5.5.0 with our gauge will be considered illegal)
           
  • Brake Caliper
    • In Stock location
    • Single Piston only
       
  • Upper A-Arms
    • Steel
    • Any length
    • Aluminum cross shafts allowed
       
    • Hubs
      • Heavy duty allowed / recommended
      • Wide Five hubs add 50 lbs.
         
    • Front Sway bar
      • Any GM stock type front sway bar
      • 1 piece
      • Max 1 and 1/2 inches bar
         
    • Front 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 71 inches
        • Max front tread width 72 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.)
  
  • Type
    • 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 1.0 inche over.
        Examples below include allowance of .25 inches
        (16.251 – 17.250 add 10 lbs)
        17.251 – 18.250 add  20 lbs)
         
  • Rear tread width
    • A/B ,C and D except Seekonk Metric
      • May not be wider than front
      • Max 74 inches
        • If over add 20 lbs per inch or 10 lbs per 1/2 inch
    • Seekonk Metric
      • May not be wider the the front
      • Max rear tread width 72 inches
        
    • 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
         
    • Non stock suspension parts
      • 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

• Springs and Shocks (Front and Rear)
  • Steel – Magnetic
  • Jacking Bolts permitted at all four wheels
    • above spring only.
  • 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 rate 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 $225.00
  • Shock can be claimed by series or any competitor for $250.00
    
    ____________________________________________________________________

12.2  Suspension – Chassis  Type C

• Front
  • 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 allowed without penalty.
    • Camber
      • NHIS only
        • More positive than -5.0 Right Front Max negative with 0.5 allowance
          (-5.5.0 with our gauge will be considered illegal)
          
  • Upper A-Arms
    • Steel
    • Any length
    • Aluminum cross shafts allowed 
       
    • Hubs
      • Heavy duty allowed / recommended
      • Wide Five hubs add 50 lbs.
        
    • Front Sway Bar
      • Any GM stock type front sway bar allowed
      • 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)
      • 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
      • Mono-ball is not allowed
         
    • 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
  • 3 point Suspensionyy
    • 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
    • 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 Sway bar is not allowed
     
• Springs (Front and Rear)
  • Steel – Magnetic
  • Jacking Bolts permitted at all four wheels
    • above spring only.
  • 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 (Front and rear)
  • Must mount directly to lower control arm
  • 1 shock per wheel
  • Must be readily available for purchase for $225.00
  • Shock can be claimed by series or any competitor for $250.00