NECC Motorsports - High performance driving events brought to you by the Northeast Corvair Council since 1974.

NECC Corvair Classification Calculator

NECC has a number of classes for Corvairs that participate in time trials, including Street Stock, Improved Stock, Street Modified, Competition and Specialty Classes.  Please read the NECC Classification Rules for Track Events and classify your car before coming to the track.

Street Stock, Competition and Specialty Corvairs are easy to classify because the rules for these classes are simple.  However, the distinction between Improved Stock and Street Modified cars can be a bit tricky.

So to avoid confusion, we present the following NECC Corvair Classification Calculator.  Click on the radio buttons to designate the modifications you have made to your Corvair.  The NECC Classification Calculator will add up the points for you.  If the "Total Points" is blank, then enable "Active Controls" in your web browser.

Chassis & Body Modifications

Non-stock Wheels, any diameter, up to 7" in width

25

Wheels, any diameter, greater than 7" in width

35

Tires, less than 70 Series

20

Tires, less than 60 Series

30

Tires, R Designation

30

Non-Stock Anti-Sway Bar, Front

10

Anti-Sway Bar, Rear

10

Relocated Suspension

5

Alternate, Non-metallic Bushings (note 1)

15

Rear Seat Removal (area must be covered)

5

Steering Wheel small than 350mm

5

Disc Brake Conversion, first axle

25

Disc Brake Conversion, additional axle

15

Battery Relocation

5

Convertibles

- 5

Air-conditioned Vehicles

- 5

Engine Modifications, All

Non-stock Exhaust Logs

5

Exhaust Headers (note 4)

25

Raising Compression (note 5)

20

Camshaft

20

Non-stock Cylinders

10

Capacitive Discharge Ignition

5

Multiple Ignition Coils

5

Dwell Control (i.e. Ignitor II)

5

Distributor-less Ignition System (note 6)

15

Engine Modifications, Normally Aspirated

Non-stock Carburetion or TBI (note 2)

30

Engine Modifications, Turbo

Turbo Wastegate

10

Non-stock Turbo(s) / Supercharger(s) (note 3)

30

Non-stock Carburetion or TBI on Turbo Engines

10

Other Than Turbo or 95 Hp Cylinder Heads

25

 

TOTAL Points Assessed = 

If the point total is less than or equal to 125, then your Corvair belongs in the Improved Stock class.  If the point total exceeds 125, then your Corvair belongs in the Street Modified class or the Competition class.

The table shown above is an automated replica of the table that appears in the NECC rule book.  Cars in other classes may disregard this Improved Stock checklist.

Notes for Table Above:

1.  A-arms and (rear) trailing arms only.
2.  Normally Aspirated cars only. Changes limited to bolt on only. The addition of TBI units or runners for a center mounted carb or TBI unit is permitted. No welding or machining of cylinder heads permitted.
3. Turbocharged cars only. Changes limited to bolt on only. The addition of TBI units or runners for any single carb (including multiple barrel Weber, Holley, etc.) is permitted.
4.  No welding or machining of cylinder heads permitted.
5.  Incidental compression changes due to cylinder bore changes or cylinder head swaps are permitted.
6.  The maximum points for any ignition system including independent DIS is 15.

Another handy tool.  Your car's weight distribution:

You don't need to weigh your car to pass NECC tech inspection.  But you may want to know its weight distribution if you're trying to tune its suspension.  Here is a link to a handy tool for determining the gross weight of your car and the distribution of that weight between the four tires, (i.e. % wedge).  http://www.opuscorvair.com/cornerweightcalculator.html

Corvair Classification Calculator
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This site was last updated 07/30/15 by redbat01@verizon.net