Class Details
There are two classes eligible for the points in the Toyo Tire F1600 Championship:
- The “A” class is for chassis built in 1995 and newer
- The “B” class is for chassis built in 1994 and older
The date of manufacture is for the individual car, not the model.
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Class A Specifictions
| The “A” class is for chassis built in 1995 and newer | |
|---|---|
| Engine Type | Honda HPD L15A7 Fit Production-based inline 4-cylinder |
| Displacement | 1.5 L (91.3 cubic inches) |
| Valvetrain | Single overhead camshaft, 4 valves per cylinder i-VTEC |
| Crankshaft | Steel alloy 5 main bearings |
| Pistons | Cast aluminium alloy |
| Connecting rods | Forged steel alloy |
| Engine management | HPD |
| Ignition system | Digital inductive |
| Lubrication | Dry sump |
| Cooling | Single mechanical water pump |
| Transmission | 4-speed manual |
| Fuel | 91 octane unleaded |
| Weight | 215 lbs (97.5 kg) |
Class B Specifictions
| The “B” class is for chassis built in 1994 and older | |
|---|---|
| Engine Type | Ford 1600 GT Kent Inline 4-cylinder |
| Displacement | 1,598cc |
| Valvetrain | Overhead valve |
| Crankshaft | Cast iron |
| Pistons | Forged aluminium alloy |
| Connecting rods | Forged steel alloy |
| Engine management | Not Applicable |
| Ignition system | Not Applicable |
| Lubrication | Dry sump |
| Cooling | Water cooled |
| Transmission | 4-speed manual |
| Fuel | 91 octane unleaded |
| Weight | 215 lbs (97.5 kg) |
If a prototype of your car was built prior to 1994, but not released in production until post January 1, 1995, the car is a Class “A” competition vehicle. It is the responsibility of the car owner/driver to consult the CASC-OR Road Race, General Competition and Formula 1600 Regulations to ensure that their vehicle meets the class specifications.
All cars with the Honda Fit power unit are assigned the “A” Class, regardless of year of chassis manufacture.
A Class Car
Photograph by Robert Coburn – #67 Stewart Ross – Britain West Motorsport – 2025 A Class Champion
B Class Car
Photograph by Robert Coburn – #32 Andrew Mason – Mason Racing – 2025 B Class Champion