Is this legal?

[Larry Fulton]

**** this... Does it really matter?
****'s been slid through, covered up or accepted by certain divisions / or inspectors for years,
so that there's nothing "stock" about this class anymore anyway. Weld the bars in. Who cares.

[Billy Nees]

Originally Posted by Larry Fulton

**** this... Does it really matter?

It does to me!

[Larry Fulton]

Apparently Billy, You & I are the only ones that it matters to.... to those that have ****ed up this class it doesn't.

[dartman]

Originally Posted by Billy Nees

I can't find that one. Could you please point out where that is in the book?

Original rear end may be replaced with another from the same
automobile manufacturer; truck rear end prohibited. Distance
between backing plates may not be changed. Any gear ratio that
fits third-member case or housing permitted. Limited-slip or
ratchet-type rear ends permitted. Reinforcement of spring perch
permitted. Spools permitted only with aftermarket axles.
Aftermarket axles not required for front-wheel-drive vehicles.
Larger brakes may be used. Replacement rear end may be
narrowed or widened to obtain original rear-end width. Bracing or
beefing up the rear-end housing permitted.


Swing axle differential may be replaced with conventional housing;
stock trailing arms must be retained, may be beefed up and
adapted to housing, must retain transverse spring. Must install
Panhard bar. Frame may be notched for driveshaft clearance.
Distance between OEM backing plates and OEM wheelbase must
be maintained. Coil-over shock or four-link adaptations prohibited.
See General Regulations 2:11.


I assume that's on the housing only is the way I read it

FRAME
Frame or subframe must be stock for body used. Subframes on
unibody cars may be joined. Maximum-size material to be used is 2
inches x 3 inches x 1/8-inch. Round tubing may be used to tie front
and rear subframes together and join subframe in straight line
extending through car floor, with floor completely welded to
member.

i don't see the words "beefing up" under " FRAME"

[dartman]

is sway bar and anti roll bar the same thing in a f-body?

[Ed Wright]

Originally Posted by dartman

is sway bar and anti roll bar the same thing in a f-body?

No sir.

[Chad Rhodes]

Originally Posted by dartman

Original rear end may be replaced with another from the same
automobile manufacturer; truck rear end prohibited. Distance
between backing plates may not be changed. Any gear ratio that
fits third-member case or housing permitted. Limited-slip or
ratchet-type rear ends permitted. Reinforcement of spring perch
permitted. Spools permitted only with aftermarket axles.
Aftermarket axles not required for front-wheel-drive vehicles.
Larger brakes may be used. Replacement rear end may be
narrowed or widened to obtain original rear-end width. Bracing or
beefing up the rear-end housing permitted.


Swing axle differential may be replaced with conventional housing;
stock trailing arms must be retained, may be beefed up and
adapted to housing, must retain transverse spring. Must install
Panhard bar. Frame may be notched for driveshaft clearance.
Distance between OEM backing plates and OEM wheelbase must
be maintained. Coil-over shock or four-link adaptations prohibited.
See General Regulations 2:11.


I assume that's on the housing only is the way I read it

FRAME
Frame or subframe must be stock for body used. Subframes on
unibody cars may be joined. Maximum-size material to be used is 2
inches x 3 inches x 1/8-inch. Round tubing may be used to tie front
and rear subframes together and join subframe in straight line
extending through car floor, with floor completely welded to
member.

i don't see the words "beefing up" under " FRAME"

Well there used to be something to that effect. But I haven't read that section in a while.

[Mark Yacavone]

Originally Posted by stk4178

Considering that wolfe sells a weld-in package for mustangs. I would say its legal for stock

I would say it's NOT.

[Mark Yacavone]

NHRA should spend some time looking under cars instead of just looking under hoods.

I WOULD agree with this.


Years ago, the first time I tore the left lower trailing arm bracket off a full size Chevy frame, I had to do something to fix it...or park the car.
That didn't seem like a good option at the time, so I welded the bracket back on and added a couple of gussets to it. No one ever said anything about or most likely ,even noticed it.
Was it technically legal? Probably not.
If you are allowed to weld braces and brackets to suspension mounts, then it should be mentioned in the rule book.
Just because this deal is out there, doesn't make it legal.
Look how long the first gen. weebie jeebie bars were out there before someone in tech figured out they were moving the whole lower pivot to a non OEM location.

[Aubrey N Bruneau]

As I understand it, the purpose of a rear "anti-roll" bar, is to help resist the tendency for the entire car to twist or "tilt" to the right on launch, and in the lower gears ? Right ?
In extreme cases ( and I think we've all seen those videos of the early 60's Chevy nostalgia match racing cars that almost lay on their right side on launch ), this CAN'T ber safe.
Solution ?
More weight jacking to the RR spring ? ( "side effect".. no pun intended... car goes back to tilted left at high speed )
WAY stiffer springs ? ( to what end ? ... till the rear suspension doesn't move ? )
Or... install a simple device that manufacturers have used to control body roll, since the late 1930's ?
Cars with rear coil springs, will inherently be less resistant to the body rolling to one side... mostly due the fact that the springs are usually located much more inboard than a leaf spring car.
Having seen some of these "twisted" launches... I think cars with the problem should be required to control it.

As with anything. there's trade-offs.
A rear ant-roll bar, without a front anti-roll bar ( most of us don't use a front one ), creates a car with dramatic over-steer characteristics. Add to that, our low pressure rear tires, and you have someing that you better not try and make sudden moves of the steering wheel at high speed !

To me, if it's not changing the suspension geometry in any way, and you're not welding in a bunch of crap... a rear anti-roll bar should be permitted, and specified as such.
and no... I don't have one.