Post by Kelly MacKay on Sept 8, 2011 14:57:14 GMT -4
IHRA RULES ON BRAKES
BRAKES: All brake lines mounted on the firewall, where they pass flywheel bellhousing
on stick cars, must be protected. Non-drive wheel line locks permitted. OEM drum or
disc brakes from the same manufacturer permitted. OEM type front or rear disc brakes
permitted on any entry. IHRA approved OEM type aftermarket front or rear brakes
permitted. Must be equipped with stock production four-wheel hydraulic brake system,
or aftermarket front disc brakes meeting the following criteria:
1) Minimum effective piston area per wheel 3 1/2 square inches.
2) Minimum disc (rotor) diameter: 10 1/4” x 5/16” thick ferrous material only; no holes
may be drilled in disc except for mounting.
3) Mounting requirements for rotor: Five 3/8” Grade 8 bolts, eight 6/16” Grade 8 bolts
or twelve 1/4” Grade 8 bolts.
4) Must install dual master cylinder with any modified brake system, splitting front and
rear into separate systems.
rule 2 says"no holes may be drilled in disc except for mounting" so does it mean no vented rotors? now is in the IHRA book
NHRA RULES ON BRAKES
BRAKES
Must be equipped with stock production four-wheel hydraulic brake
system, or aftermarket disc brakes meeting the following criteria:
1. Minimum effective piston area per wheel: 3 1/2 square inches.
2. Minimum disc (rotor) diameter 10 1/4 inches x 5/16-inch thick.
3. Must install dual master cylinder with any modified brake system,
splitting front and rear into separate systems.
4. Dual calipers on rear wheels permitted, maximum one hydraulic
brake line to dual rear brake system (no wires).
5. Rear wheel line-loc prohibited; front wheel line-loc permitted.
Parking brake optional.
6. Carbon-fiber brake rotors prohibited.
NHRA has no rule on drilled(vented)rotors.
BRAKES: All brake lines mounted on the firewall, where they pass flywheel bellhousing
on stick cars, must be protected. Non-drive wheel line locks permitted. OEM drum or
disc brakes from the same manufacturer permitted. OEM type front or rear disc brakes
permitted on any entry. IHRA approved OEM type aftermarket front or rear brakes
permitted. Must be equipped with stock production four-wheel hydraulic brake system,
or aftermarket front disc brakes meeting the following criteria:
1) Minimum effective piston area per wheel 3 1/2 square inches.
2) Minimum disc (rotor) diameter: 10 1/4” x 5/16” thick ferrous material only; no holes
may be drilled in disc except for mounting.
3) Mounting requirements for rotor: Five 3/8” Grade 8 bolts, eight 6/16” Grade 8 bolts
or twelve 1/4” Grade 8 bolts.
4) Must install dual master cylinder with any modified brake system, splitting front and
rear into separate systems.
rule 2 says"no holes may be drilled in disc except for mounting" so does it mean no vented rotors? now is in the IHRA book
NHRA RULES ON BRAKES
BRAKES
Must be equipped with stock production four-wheel hydraulic brake
system, or aftermarket disc brakes meeting the following criteria:
1. Minimum effective piston area per wheel: 3 1/2 square inches.
2. Minimum disc (rotor) diameter 10 1/4 inches x 5/16-inch thick.
3. Must install dual master cylinder with any modified brake system,
splitting front and rear into separate systems.
4. Dual calipers on rear wheels permitted, maximum one hydraulic
brake line to dual rear brake system (no wires).
5. Rear wheel line-loc prohibited; front wheel line-loc permitted.
Parking brake optional.
6. Carbon-fiber brake rotors prohibited.
NHRA has no rule on drilled(vented)rotors.