2023 Windy City BMW Club Autocross Calculator
Select you car to begin
Series
1 Series
2 Series
3 Series
4 Series
5 Series
6 Series
7 Series
8 Series
i Series
Mini
Vintage
X Series
Z Series
Generation
1 Series – 2nd generation (E87, E88) 2004-2011
1 Series – 3rd generation (F20) 2011-
Model
128i
135i
135is
1M
Starting Points
C (19.5-34)
Modification Points
(No Weight Points)
Ending Points
C (19.5-34)
ENGINE POINTS
Lightened flywheel
(1)
Software upgrades (NA)
(1)
Changed camshaft (non-race)
(1)
Increased Boost Pressure (Mini)
(1)
Intake Modification (Other than Cold Air)
(2)
Software upgrades (Stock Turbo)
(5)
Turbocharger/Supercharger (Non-stock)
(5)
ENGINE SWAP
Engine Swap - Check the box to select the type of Swap
(0)
DRIVELINE POINTS
Changed Final drive Ratio
No Change (0)
5-19% (4)
20-29% (7)
30%+ (10)
5 speed close ratio transmision
(2)
Limited slip diff
No Change (0)
0-40% (non-standard) (3)
41+% (all cars) (5)
SUSPENSION POINTS
M-Sport Package (2008 and later)
(1)
Adjustable coil-overs
(8)
(Selecting this will remove the choice of Shocks/Springs)
Adjustable shocks (per pair)
No Change (0)
1 Pair (2)
2 Pair (4)
Non-Stock springs (Lowered)
(4)
Sway/antiroll bar (non-stock) (each)
No Change (0)
1 Bar (2)
2 Bars (4)
Active Roll Stabilization (ARS),
Electornic Damper Control,
or Track Handling Package
(4)
Front Camber plates, E36 hat swap or Crash bolts/washers
(3)
Rear Non-Stock Camber arms
(1)
Active/Quick ratio steering
(2)
Stress Bar
No Change (0)
1 Bar (0.5)
2 Bars (1)
WHEEL AND TIRE POINTS
Increased wheel width 1"+ or tire width 20mm or more
No Change (0)
1 axel (1)
2 axel (2)
Tire Type
Street Tire Treadwear 180 and up (0)
'R' Comp Treadwear 101 to 179 (8)
'R' Comp Treadwear <101 (I CLASS ONLY)
CHASSIS AND BODY POINTS
Chassis stiffening (Seam Welding, bracing, roll cages, etc).
None (0)
Minor (3)
Medium (6)
Major (10)
WEIGHT REDUCTION POINTS
Your first 3 pts are 'free' but select more than 3 and all points count!
Replacing Drivers Seat with Lightweight Seat
No Change (0)
Recline (1)
Fixed Back (2)
Replacing Passenger Seat with Lightweight Seat
No Change (0)
Recline (1)
Fixed Back (2)
Removed (3)
Removal of Rear Seats
(1)
Replacing Battery with light weight version
No Change (0)
Car battery (1)
Non-Car Battery (2)
Battery relocated to trunk
(1)
Replacement of Doors with non-stock doors
(1)
Replacement of Hood with non-stock part
(1)
Replacement of Trunk Lid with non-stock part
(0.5)
Replace Roof panel with Carbon roof
(1)
Removal of Sunroof
(2)
Replacement of other Body Panels with non-stock parts
(3)
Replacement of Windshield with plastic
(1)
Replacement or removal of rear/side/door Glass with plastic
(2)
Removal of Stereo/Audio system including speakers
(0.5)
Removal of Air Conditioning System
(1)
Removal of Interior (Door cards, carpet, sound padding)
(4)