Roll cage spec?

[RacerX]

I'm looking to have a roll cage installed. Nothing fancy just a simple 4/6 point. I'm new to drag racing but I hear there are some specs to be aware of. Type of bar, thinckness etc. I do oval racing the spec is fairly low, 1 3/4" cold rolled seamed and .095, I have a feeling NHRA and such want DOM and .125?

Still looking for a good reasonable welder.fabricator to do the job in a '94 GT coupe.




Thanks, Dave

[mustang8998]

First off, what kind of times are you looking to run?

Is the car a vert?

[03z06vette]

Dave, believe it or not, we need more info!!!! will you be rinning 8s or 10.99 and up

[bestracing]

With a hard top car with stock floor, trans tunnel and firewall you can get away with just a 6 point roll bar up to 10.00 seconds. If you are planning on running to 11.50 and the car is still stock bodied you don't need a rollbar or cage.

The rollbar must be constructed of minimum 1 ¾ inch o.d. x .118 inch wall mild steel tubing, or 1 ¾ x .083 chrome moly tubing

This is just a basic list of rules but you need a NHRA rule book to cover all the SFI ratings and how often they need replaced or re-cert.

13.99 and Quicker:
Helmet
Driveshaft Safety Loop - Cars with slicks
Roll Bar - Convertibles
5-Point Harness - Convertibles

11.49 and Quicker:
Driveshaft Safety Loop – ALL CARS
Roll Bar
SFI Approved 5-Point Harness
SFI Approved Clutch and Flywheel
SFI Approved Flywheel Shield
SFI Approved Jacket
SFI Approved Arm Restraints - Convertibles

10.99 and Quicker:
SFI Approved Harmonic Balancer/Damper
SFI Approved Transmission Shield – Automatics
Aftermarket Axles
Roll Cage – Convertible

9.99 and Quicker:
SFI Approved Flexplate and Shield – Automatics
Roll Cage – ALL CARS (also 135 MPH or faster)
Master Power Disconnect Switch - ALL CARS (also 135 MPH and faster)
SFI Approved Jacket
SFI Approved Pants
SFI Approved Neck Collar
SFI Approved Gloves
Parachute (also 150 MPH or faster)

[bestracing]

Also should be similar to this....
http://image.hotrod.com/f/9546348+w750+st0/p112820_image_large.jpg