Roll Cage Question (Vinnie, Jim, and the rest)
Senior Member
Joined: Mar 2000
Posts: 6,798
Likes: 0
From: TEXAS
Originally posted by SVT_KY
I respect that ...
Doug, put your JDM cheerleader hat away for a sec ... I didn't
say anything about JDM. But if the shoe fits ... My critique
is about ANY bar that would seem to be built for convienence
or bling and not for the ultimate use that it was intended for.
Any bar that has been bent is just a precursor to a collapse (IMHO).
SNIP
Doug, I know the rear bars in the bed fasten to the
frame rails (welded?) and I was refering to the main
hoop bars that are sometimes just bolted or welded to
the floor plates by the "B" pillar.
SNIP
Exactly how much force does a 5,000 truck
exert falling 8 feet at 130 MPH?
I respect that ...
Doug, put your JDM cheerleader hat away for a sec ... I didn't
say anything about JDM. But if the shoe fits ... My critique
is about ANY bar that would seem to be built for convienence
or bling and not for the ultimate use that it was intended for.
Any bar that has been bent is just a precursor to a collapse (IMHO).
SNIP
Doug, I know the rear bars in the bed fasten to the
frame rails (welded?) and I was refering to the main
hoop bars that are sometimes just bolted or welded to
the floor plates by the "B" pillar.
SNIP
Exactly how much force does a 5,000 truck
exert falling 8 feet at 130 MPH?
We are talking about a drag racing legal cage here not a road course or open track cage.
Put aside your Im a ***** hat for a second. The fact that the only Lightning cage I have seen in the build stage happened to be built for JDM makes me a cheerleader ? Give me a ****ing break. Tell me 30 months ago who else was installling cages in Lightnings and how many have they done. In my case it was the only experience I had. This site is supposed to be about people sharing their expereinces, thats exactly what I did. It cointinues to amuse me how people seem to have trigger words. For Jaimie its angle
for you its JDM ... Thats funny.The Back posts I was referring to were directly behind the driver - down next to the seat belt attach and thru to the floor of the cabs.
Almost any cage that passes tech is better than none. The bends you mention are only a problem if the cage is not engineered correctly. If the wall thickness is right you could make a cage that has no straight tubes. After all, in most cases we know its not the tube that will fail but the welds... Your point about gussets is a good one BUT once again if the cage is designed with thick enough tube for the application, and welded correctly gussets are not needed.
Doug
Senior Member
Joined: Feb 2002
Posts: 4,922
Likes: 1
From: Lexington, KY
Originally posted by Silver_2000_
!
Cliff
We are talking about a drag racing legal cage here not a road course or open track cage.
Doug
! Cliff
We are talking about a drag racing legal cage here not a road course or open track cage.
Doug
KNOWS it's on a dragstrip and not a road course? It's all
about physics in the end ...
Senior Member
Joined: Nov 2003
Posts: 839
Likes: 0
From: San Antonio, Texas
It just has to look at its tires!
Sorry - couldn't resist.
I am not a road cource racing follower, but you are definately right - the physics will be the same. Are the OBSTACLES the same?
I'm not being a smartass - I really don't know. Wrecks at the dragstrip typically involve a loss of control, an impact with another object (retaining wall or competitor), then often a flip onto the roof and a long spinning skid on the shiny side.
I would think (opperative word - it's just an opinion) that the impact with other objects would cause the most strain in this type of wreck. The shedding or absorbing of this impact is what would put the cage or bar to the test. In drag racing an 8' free fall is not very typical, but a full speed 30 degree sideswipe with the wall is fairly common.
Most of the SV for the L community seem to cater more toward the drag strip than the twisties - are the roll bar or cage requirements similar among these sanctioning bodies?
Herb
Sorry - couldn't resist.
I am not a road cource racing follower, but you are definately right - the physics will be the same. Are the OBSTACLES the same?
I'm not being a smartass - I really don't know. Wrecks at the dragstrip typically involve a loss of control, an impact with another object (retaining wall or competitor), then often a flip onto the roof and a long spinning skid on the shiny side.
I would think (opperative word - it's just an opinion) that the impact with other objects would cause the most strain in this type of wreck. The shedding or absorbing of this impact is what would put the cage or bar to the test. In drag racing an 8' free fall is not very typical, but a full speed 30 degree sideswipe with the wall is fairly common.
Most of the SV for the L community seem to cater more toward the drag strip than the twisties - are the roll bar or cage requirements similar among these sanctioning bodies?
Herb