Fluids
BrakeWilwood 570 / AP 550
Transmissionany good 75/90 per Taylor
Engine Oil15W50 Redline or Mobil 1
Oil FilterWix 51347
Oil Change Frequencyevery second race
Oil Capacity4 quarts
CoolantWater with Redline water wetter / 50-50 Prestone in winter
Tires
Sizes - Goodyear20.0 x 6.5-13 front / 22.0 x 9.0-13 rear
Sizes - Hoosier20.0 x 7.0-13 front / 22.0 x 9.0-13 rear
Air Pressure - COLD14 psi front / 16 psi rear
Air Pressure - HOT16 psi front / 18 psi rear
Avon and Hoosier say to keep HOT pressures below 20 psi.
Engine
Redline6,800 RPM
Valve Lashintake = 0.008" / exhaust = 0.010"
Head Bolt Torque85 lb-ft
Spark PlugsNGK AP8FS
Timing Marks - on flywheelFirst Mark - white; 34 degrees BTDC
Second Mark - red; TDC
Exhaust Gas Temperature1,350F - 1,550F at end of straight
Chassis
Chassis Number ID Platebase of left upright for forward roll hoop
Wheel Torque120 lb-ft
Front Rocker Spherical BearingAurora COM10T-15 / Heim LS10
Rear Rocker Spherical BearingNMB AB WT-8 / Baker Precision Bearing 213-427-2375
Front Wheel BearingFiat 128
Rear Wheel BearingAudi 5000
Front Rocker BushingsDelrin; Available from Prince, Eakin and IRP
Skid PlatesAvailable from Prince
Steering Rack BushingBronze Oilite; 7/8" ID, 1" OD, 1" long
Caster3-10 degrees; must be same on both sides
Camber-0.75 to -1 degree
Front Toe 1/16"; 10 to 15 minutes
Rake 0.5" front lower
Class Minimum Weight1,174 pounds with driver
Typical Corner WeightsFront - 255 / Rear - 365 / Total - 1,240
Brake PadsPerformance Friction Carbon Metallic / Hawk Blue