DarkHorse_LS1

Does anyone know what cage setup is required for 1/4 mile ET's of:
11.99
10.99
9.99
9.49
8.99(since LS1's have recently broke into this ET)
Or what ever the rules break them out to.

I called a number of shops in Texas and I got a different answer from each shop, and you wouldn't believe the variance in pricing for a similar cage setup.
It looks like I'm getting up sold on the cage, even when telling them I want the minimum for an ET and do not want to run quicker.
If I *KNOW* what is the minimum requirement, then I can make better informed decisions and avoid getting over-sold
and over-charged.

GeorgeC

11.99 requires a minimum 5-point roll bar made from 1.75" tubing. That's good (assuming the car is not backhalved) down to 10.00.

To run quicker than 10.00, you need a full rollcage (10-point due to the short angled bars coming off the main hoop, which I'm not 100% sure if they're required). The cage also has to be NHRA certified, and is good to 7.50 ET's. A lot of other safety requirements come into play also, but that's the basics as far as roll bars/cages are concerned.

LARRY01Z28

iTrader: (28)

NHRA, is 11.99 and faster, 6point.
IHRA is 11.49 and faster. 6 point.
Both good until 10's after that its a 10 point good to 7.50's this is what i was emailed from the safety director of IHRA.

MADMAN

iTrader: (4)

If you want to know what to compare and the rules then give me a call 281-449-8833. Even if I dont do the cage I will give the straight answers and help you out.

Tom the roofer

iTrader: (9)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by GeorgeC:
<strong> minimum 5-point roll bar made from 1.75" tubing. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Is the 1.75" for both mild steel and chrome moly. Is the same thickness required for a 10 point cage also.
thanks
Tom

DarkHorse_LS1

Another word that comes up from almost all the calls was a halo.

At what point is this "halo" required?

MadMan's shop is very from from me, but I'll call for a couple of quick answers later this week.

GeorgeC

Tom, I believe the wall thickness is the same for mild steel and chromemoly. A 10-point cage allows you to use 1 5/8" tubing instead of the slightly heavier 1 3/4" required for the 5-point.

Darkhorse, the "halo" is the roof bar which connects the main hoop to the bars that run down along the windshield pillars and through the dash.

Give Madman a call. Even if he's too far for you to take the car to, he'll give you straight up answers. He knows his ****.

Tom the roofer

iTrader: (9)

Thanks George, the shop installing my 10 point said they were using 1 5/8" chrome moly tubing. I'm going to buy an updated rule book <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Tom

MADMAN

iTrader: (4)

A 6pt roll bar must be 1.750 and if it is mild steel it must be .134 wall, chromemoly can be .095 wall. A 10 point can be 1.625 but the wall thicknesses are the same.

Colonel

"NHRA, is 11.99 and faster, 6point.
IHRA is 11.49 and faster. 6 point.

Actually, 5. The passenger's side bar isn't necessary.

So the 10-point is good for 7.5? Cool, no more cages to buy for awhile! <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

OvalHunter

Don't they also require all Chrome Moly to be TIG welded versus MIG for mild steel?

DarkHorse_LS1

Great there's a little more info coming out.

When is a Halo required?

1320

iTrader: (6)

Actually .134 wall tubing is NOT the minimum....120 is.....and it is currently only checked on 9.99 and faster cars....It is checked via ultra sound.....and .134 is used becuse it is .134 before its rolled......then rolled it will chck less....so if you use a 120 wall it could check less as tubing.....like 118........and not pass a 9.99 and faster chassis cert....

The wall thickness is a pretty minor thing on a bar or cage.....most are installed and welded incorectly.....luckly even those have prooved pretty strong in an incident....

MMI Z28

I thought a 6 point was good to 9.99 and a 5 point to 10.99.

Air21

are the sanctioning bodies going to make the us have to run a dash bar anytime soon?