2019-WCMA-Classing-Calculator-Form
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ABCDEFGHIJKLM
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*note for PTC the PT points must also be complete
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SU, ST1-6 Adj WT-HP Calculator & Form
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Ower Name
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Email
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Date
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Make
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Model
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Trim
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Year
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Colour
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Fill in Only Yellow Cells (as appropriate)
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Minimum Competition Weight with driver (lbs)
2825
Your Adjusted WT/HP is
14.070
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(enter number in pounds in the box above)
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Average Chassis Dyno (whp)
185
Your Class is
ST5
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(enter HP in the boxes below)
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(If Mustang or Dyno Dynamics Dyno - check box below for 10% correction)
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redline9250
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Forced Induction vehicles, check box
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Maximum Chassis Dyno (whp)
185Unadjusted WT/HP
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Chassis Dyno @ 250 rpm < max HP(whp)
15.27027027
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Chassis Dyno @ 500 rpm < max HP(whp)
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Chassis Dyno @ 750 rpm < max HP(whp)
Adjusted WT/HP Limit per class
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Chassis Dyno @ 1000 rpm < max HP(whp)
ST1 ST2ST3ST4ST5ST6
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Chassis Dyno @ 1250 rpm < max HP(whp)
6.008.0010.0012.0014.0018.00
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Chassis Dyno @ 1500 rpm < max HP(whp)
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Chassis Dyno @ 1750 rpm < max HP(whp)
Adjustments per class (NP =Not Premitted in class)
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Chassis Dyno @ 2000 rpm < max HP(whp)
ST1 ST2ST3ST4ST5ST6
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Chassis Dyno @ 250 rpm > max HP(whp)
If any data point does not exist due to redline leave blank-0.1-0.10.30.3-1.2-1.2
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Chassis Dyno @ 500 rpm > max HP(whp)
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Chassis Dyno @ 750 rpm > max HP(whp)
Adjusted WT/HP calulations per class
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Chassis Dyno @ 1000 rpm > max HP(whp)
ST1 ST2ST3ST4ST5ST6
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Chassis Dyno @ 1250 rpm > max HP(whp)
15.170315.170315.570315.570314.070314.0703
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Chassis Dyno @ 1500 rpm > max HP(whp)
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Chassis Dyno @ 1750 rpm > max HP(whp)
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Chassis Dyno @ 2000 rpm > max HP(whp)
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Average Chassis Dyno (whp)
185
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Factor used
Modification factor
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ChassisST1 ST2ST3ST4ST5ST6
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Sports Racing, Prototypes, Monocoque race cars
0.000.000.000.000.000.000.00
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Non-Production Vehicle Modification Factor (excl ST4-5)
0.000.000.000.000.000.000.00
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ST5 & 6 ONLY- cage bars that penetrate the front bulkhead/firewall
0.000.000.000.000.000.000.00
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Production Vehicle Modification Factors
ST1 ST2ST3ST4ST5ST6
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Modification of the OEM roof line/shape
0.000.000.000.000.000.000.00
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Modification of the floor pan for exhaust clearance only
0.000.000.000.000.000.000.00
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and/or rocker panel for side exit exhaust only
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ST3-6 only - OEM Aero
0.400.000.000.400.400.400.40
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ST5 only - Single, Flat, Horizontal Front Splitter (no greater than 4”)
0.000.000.000.000.000.000.00
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ST6 only Single rear wing or spoiler
0.000.000.000.000.000.000.00
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(note - Non Production Vehicle types should not apply any Production Vehicle Modification Factors)
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Weight Factor (light)
ST1 ST2ST3ST4ST5ST6
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Weight Factor (light)
-0.20-0.10-0.10-0.10-0.10-0.20-0.20
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Weight Factor (heavy)
0.00000000
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ST1-4
< 3000 = -0.1
< 2600 = -0.2
< 2200 = -0.3
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> 3300 = +0.1
> 3400 = +0.2
> 3500 = +0.6
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> 3600 = +0.4
> 3750 = +0.5
> 3900 = +0.6
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ST5
< 2850 = -0.1
< 2650 = -0.2
< 2550= -0.3
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< 2450 = -0.4
< 2250 = -0.5
< 2250= -0.6
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> 3300 = +0.1
> 3400 = +0.2
> 3500 = +0.3
> 3600 = +0.4
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Engine Modification Factors
ST1 ST2ST3ST4ST5ST6
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ST5 & 6 - Rear-Mid or Rear engine layout (not Front-Mid)
0.000.000.000.000.000.000.00
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Transmission Modification Factors
ST1 ST2ST3ST4ST5ST6
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Dog Ring/Straight Cut Gears (non-synchromesh)
0.000.000.000.000.000.000.00
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OEM Street-legal model available paddle shift/DCT/SMG
0.000.000.000.000.000.000.00
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or sequential motorcycle gearbox
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All other sequential/semi-automatic0.000.000.000.000.000.000.00
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Drivetrain Modification Factors
ST1 ST2ST3ST4ST5ST6
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All-Wheel Drive
0.000.000.000.000.000.000.00
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Front-Wheel Drive
0.000.000.000.000.000.000.00
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Tire Modification Factors (DOT tires only in ST4-6 and max sizes by weight)
ST1 ST2ST3ST4ST5ST6
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Non-DOT Approved Compound/Construction tires
0.000.000.000.000.000.000.00
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DOT- Approved R-Comp Autocross tires
0.000.000.000.000.000.000.00
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UTQG Treadwear rating 100 or greater
0.000.000.000.000.000.000.00
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Non-DOT Tire Size 10.5 (267mm) to 9.6 (244mm)
0.000.000.000.000.000.000.00
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Non-DOT Tire Size 9.5 (241mm) or smaller
0.000.000.000.000.000.000.00
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DOT-approved, NASA Section Width 267mm to 282mm
0.000.000.000.000.000.000.00
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DOT-approved, NASA Section Width 266mm or smaller
0.000.000.000.000.000.000.00
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ST5-6 Brake and Suspension Modification Factors
ST1 ST2ST3ST4ST5ST6
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Non-OEM, modified or relocated brake calipers/brackets
0.000.000.000.000.000.000.00
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or rotor diameter
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Suspension design utilizing upper “A-arm” or “wishbone”
-0.700.000.000.000.00-0.70-0.70
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type control arms (front or rear)
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Replace, modify, or remove control arms, camber arms/links,
0.000.000.000.000.000.000.00
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toe arms/links
97
Add, replace, or modify a Watts link, Panhard Rod, or Torque Arm
0.000.000.000.000.000.000.00
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Non-OEM metallic and/or spherical design replacement suspension
0.000.000.000.000.000.000.00
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bushing modifications on control/camber/toe arms/links,
100
panhard rods, watts links, and torque arms
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