hmm...maybe bolt-in cages do work...PICS of Subaru roll-over at Buttonwillow
12-26-2008, 08:44 AM
#21
That SCCA letter from 2004 was rescinded by the SCCA 3 months after they issued it. It was a mistake based on poor research and was not approved by the BoD or the technical staff.
There's a lot of mistaken information, assumptions, and odd opinions in this thread. A bolt-in roll cage that meets SCCA's GCR rules is pretty much equal in safety to a custom weld-in roll cage at the impact speeds designed for (typical GT/IT class accidents occur at speeds of 80mph or less).
The biggest issue with bolt-in roll cages is proper installation. Many installers get lazy and don't install the backing plates, bolt the cage over interior panel sound deadening, drill holes too large in the unibody, forget to deburr the mounting holes, have bolts running at an angle to the mounting plates instead of perpendicular, etc.
There's a lot of mistaken information, assumptions, and odd opinions in this thread. A bolt-in roll cage that meets SCCA's GCR rules is pretty much equal in safety to a custom weld-in roll cage at the impact speeds designed for (typical GT/IT class accidents occur at speeds of 80mph or less).
The biggest issue with bolt-in roll cages is proper installation. Many installers get lazy and don't install the backing plates, bolt the cage over interior panel sound deadening, drill holes too large in the unibody, forget to deburr the mounting holes, have bolts running at an angle to the mounting plates instead of perpendicular, etc.
01-26-2009, 11:48 AM
#23
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ChangVi - great to hear. I have 45 track days in since 2006. Probably 30 impacts have occurred during that time. 29 all by driver error. 1- Mechanical failure.
I've even had a car drop two and flip as I was approaching the area. That will put a pucker factor on you if you let it.
From SCCA on air bags and helmets:
"DATE: November 16, 2004
FROM: National Staff
TO: All Participants
SUBJECT: Airbag Advisory
It has been brought to the attention of SCCA Technical Services that the use
of full-face or closed-face helmets while driving vehicles with active airbag
restraint systems may result in injuries in the event of a crash that deploys
the airbag. Because of the location of the steering wheel relative to a
driver’s position, the airbag axis is on a level with the driver’s chin. In a
crash with airbag deployment, contact with the chin area of a full-face
helmet can be so powerful “that the risk of fractures to the jaw cannot be
ruled out“ (Hubert Gramling, FIA Institute, FT3/AF, 18.5.1999). This applies
to vehicle that may be used in Solo, RallyCross, High Performance Car
Control Clinics, etc.
Therefore, it is highly recommended that full-face helmets not be used in
vehicles with functional airbag systems. Potentially more restrictive language
is currently being considered for 2005, which could appear in an early 2005
issue of FasTrack. If you have any questions, please contact the SCCA at
(800) 770-2055."
I've even had a car drop two and flip as I was approaching the area. That will put a pucker factor on you if you let it.
From SCCA on air bags and helmets:
"DATE: November 16, 2004
FROM: National Staff
TO: All Participants
SUBJECT: Airbag Advisory
It has been brought to the attention of SCCA Technical Services that the use
of full-face or closed-face helmets while driving vehicles with active airbag
restraint systems may result in injuries in the event of a crash that deploys
the airbag. Because of the location of the steering wheel relative to a
driver’s position, the airbag axis is on a level with the driver’s chin. In a
crash with airbag deployment, contact with the chin area of a full-face
helmet can be so powerful “that the risk of fractures to the jaw cannot be
ruled out“ (Hubert Gramling, FIA Institute, FT3/AF, 18.5.1999). This applies
to vehicle that may be used in Solo, RallyCross, High Performance Car
Control Clinics, etc.
Therefore, it is highly recommended that full-face helmets not be used in
vehicles with functional airbag systems. Potentially more restrictive language
is currently being considered for 2005, which could appear in an early 2005
issue of FasTrack. If you have any questions, please contact the SCCA at
(800) 770-2055."
cheers
dp
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