them the brakes

[Kelly MacKay]

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.

[Jeff Kempton]

Kelly, I'd suggest that you email Mike Baker of IHRA for clarification on this wording. He is usually pretty good at responding quickly to any inquiries like this. You can reach him at [e-mail]

As far as our local series goes, the track Tech personnel checks things like brakes and safety equipment and then we just Tech for class legality. I can't speak for them but I doubt that they will have an issue with brakes produced by an aftermarket vendor that come with rotors that are drilled. Of course, ones drilled at home on a bench press would be another matter altogether......

[SS10]

Personally I like to see aftermarket brakes on race cars as it is a step in the right direction of safety. Greenfield Dragway has no problem with the aftermarket brakes as long as they are installed and working properly.

[Kelly MacKay]

I know their is no problem,but Ray was kind to point it out for me when he came by the shop.