Technical regulations Formula Offroad 

APPEDIX A

Nitrous Oxide

• Only complete systems from reputable manufacturers installed according to instructions are allowed.
• Nitrous bottle must be securely mounted with two steel bands of at least 2,5x25mm completely circling the bottle.
• Nitrous bottle can not be installed in the engine compartment.
• Nitrous bottle must be installed with the valve end pointing away from the driver.
• Nitrous bottle must be installed in such a way that it is protected from outside impact in case of a rollover.
• All nitrous hoses must be able to handle at least 3000psi.
• All nitrous hoses must be securely fastened.
• Electrical system for nitrous:
1. Circuits can not be “-“ switched.
2. It should not be possible to switch system on unless ignition is on.
3. The system must have a separate arming switch clearly marked NOS on/off.
4. The system should only be possible to activate at WOT throttle position.
5. The system should only be possible to activate above 2000 engine rpm.
6. A fuel pressure safety switch must be installed to disable the system if fuel pressure to system falls below 5psi.
• Closed vehicles must have a FIA/SFI approved fire extinguishing system installed with at least one nozzle aimed at the driver and one aimed at the engine.
• FIA warning sign for NOS – Green square with white lettering must be on the back of vehicle.
• Bottle warming system must be from a reputable manufacturer and installed according to instructions.
• Nitrous pressure gauge must be installed if bottle warming system is used.

APPENDIX B

Rollcage

• All vehicles must have a six point rollcage mounted directly to the frame or chassis structure that connects all six points.
• Rollcage must be designed to protect the driver from all sides.
• Seamless Steel tubes of at least 350 N/mm2 must be used. Aluminum or Chromemoly Steel is not allowed.
• Tube size must be minimum 2,5 x 45mm alternatively 2 x 50mm.
• Vehicles that do not presently have the minimum size/quality tubing in the rollcage will only be allowed to compete until 31.12.2006. After this time the rollcage must be replaced to comply with current specifications.
• No tube bends may be smaller than 4 x the tube diameter.
• All welds must be high quality. Grinding of the welds is not allowed.
• Minimum requirements of design (refer to schematic drawing):
1. One piece main rollbar installed from side to side of vehicle.
2. One piece front bar installed from side to side or one piece side bars with front bar connecting the two.
3. Rear braces from rear top corners to back of vehicle in minimum 30 degree angle.
4. Diagonal cross braces in main rollbar.
5. If rollbar width is more than 100cm: Vertical bar from top center of main rollbar to meeting point of cross braces.
6. “V” or “X” bars in roof of rollcage.
7. Tubes connecting front and rear rollbar. Preferred location is as low as possible in front bar and mid height in the rear rollbar.
• Roof plate mounted on top of rollcage:
1. 1mm steel plate securely welded in place,
or
2. 2mm steel plate bolted in place with M8 bolts of 8.8 grade no more than 50cm apart,
or
3. 3mm aluminium plate bolted in place with M8 bolts of 8.8 grade no more than 50cm apart.
4. For bolting of plate mounting brackets must be welded to rollcage. No drilling allowed in rollcage.
• For vehicles licensed after 01-01-2006:
1. Minimum size of roofplate is 0,75 m2
2. Minimum width of rollcage is 100cm.
3. Minimum distance from center of seat to outer edge of rollcage is 50cm.
(Not necessary for passenger seat in modified class)
4. Tube connecting left and right side of main rollbar mounted as low as possible in the chassis.