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
Non-stock Wheels, any diameter, up to 7" in width
Wheels, any diameter, greater than 7" in width
Tires, less than 70 Series
Tires, less than 60 Series
Tires, R Designation
Non-Stock Anti-Sway Bar, Front
Anti-Sway Bar, Rear
Alternate, Non-metallic Bushings (note 1)
Rear Seat Removal (area must be covered)
Steering Wheel small than 350mm
Disc Brake Conversion, first axle
Disc Brake Conversion, additional axle
Non-stock Exhaust Logs
Exhaust Headers (note 4)
Raising Compression (note 5)
Capacitive Discharge Ignition
Multiple Ignition Coils
Dwell Control (i.e. Ignitor II)
Distributor-less Ignition System (note 6)
Non-stock Carburetion or TBI (note 2)
Non-stock Turbo(s) / Supercharger(s) (note 3)
Non-stock Carburetion or TBI on Turbo Engines
Other Than Turbo or 95 Hp Cylinder Heads
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.
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
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.
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).
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