Roll Cage requirements - Moparts Forums

Posted By: Biginchmopar

Roll Cage requirements - 12/11/18 01:42 AM

Simple question, stock firewall, stock floor, what is the requirement to run 7.50's?

I know a simple roll cage is good to 8.50 and I'm all about being safe but what if the car runs low 8's?

I will be building my cage out of Chrome Moly.

Thanks!

Posted By: dvw

Re: Roll Cage requirements - 12/11/18 02:05 AM

Contact SFI rule specs for 25.5 D cert. Your wallet will be $38 lighter.
Doug

Posted By: Blucuda413

Re: Roll Cage requirements - 12/11/18 02:06 AM

It takes more than a simple cage including a funny car cage. Best get the SFI spec then there's no doubt you have correct info.

Posted By: Cab_Burge

Re: Roll Cage requirements - 12/11/18 05:16 AM

Funny car type cage is required to go from the 8.50 certs to 7.50. My C.M. tube chassis Cuda needs that done to go faster next year, hopefully

It was built a lot of years ago and the funny car cage wasn't required back then, it is now

Posted By: CMcAllister

Re: Roll Cage requirements - 12/11/18 07:34 PM

8.50 to 7.50 unibody with stock floor/firewall goes from a simple sportsman cert to the SFI 25.5D for 3600# max. Funny car cage, additional tubing in the floor and some things installed differently. Depending on how they were built, I've seen 8.50 cars that needed to be torn apart and redone to get them right for the 25.5. Wasn't as simple as adding bars. On a car going into the 8s, I would go on and make it legal for 25.5.

Posted By: 6PKRTSE

Re: Roll Cage requirements - 12/12/18 11:01 PM

We went with a C.M. 25.5 cage in my Challenger the first time we did the cage in it. Better safe than sorry. Easier to do all at once then go back over & over & keep adding to it.

Posted By: merpar

Re: Roll Cage requirements - 12/13/18 02:05 AM

Hey, Big Inch. Just put as much crome moly tubing in there as you can. Then get a gallon of Goriila glue to hold it together. Then you're good to go! Some more sound advice from your uncle.

Posted By: HardcoreB

Re: Roll Cage requirements - 12/13/18 05:51 PM

Originally Posted By merpar

Hey, Big Inch. Just put as much crome moly tubing in there as you can. Then get a gallon of Goriila glue to hold it together. Then you're good to go! Some more sound advice from your uncle.

Not to go against the grain of what you're saying but professionals like Bill Lutz are using RTV now-a-days.

Posted By: pittsburghracer

Re: Roll Cage requirements - 12/13/18 06:01 PM

Originally Posted By HardcoreB

Originally Posted By merpar

Hey, Big Inch. Just put as much crome moly tubing in there as you can. Then get a gallon of Goriila glue to hold it together. Then you're good to go! Some more sound advice from your uncle.

Not to go against the grain of what you're saying but professionals like Bill Lutz are using RTV now-a-days.

I see what you did there. LOL

Posted By: WHITEDART

Re: Roll Cage requirements - 12/13/18 06:05 PM

Originally Posted By pittsburghracer

Originally Posted By HardcoreB

Originally Posted By merpar

Hey, Big Inch. Just put as much crome moly tubing in there as you can. Then get a gallon of Goriila glue to hold it together. Then you're good to go! Some more sound advice from your uncle.

Not to go against the grain of what you're saying but professionals like Bill Lutz are using RTV now-a-days.

I see what you did there. LOL

obviously none of you guys have a clue to what you were talking about all the high in chassis shops now are gluing the cage together with Flex Seal. I guess the benefit is you do not need a grinder to touch up the glue

Posted By: pittsburghracer

Re: Roll Cage requirements - 12/13/18 06:07 PM

Originally Posted By Cab_Burge

Funny car type cage is required to go from the 8.50 certs to 7.50. My C.M. tube chassis Cuda needs that done to go faster next year, hopefully

It was built a lot of years ago and the funny car cage wasn't required back then, it is now

I'm betting that your car will need more updating than you think IF and I said IF the inspector checks under your car. A lot of inspectors don't but my car was on a rack at the time and it needed 6 bars added because of rule changes over the years when I updated my mild steel Daytona from 8.50 to 7.50.

And my Daytona already had a funny car type of cage.

Posted By: WHITEDART

Re: Roll Cage requirements - 12/13/18 06:43 PM

Actually I have been watching this post closely I have been avoiding the chassis update on my car for multiple reasons.. I have been lucky most of the racing that we do is 1/8th mile racing on quarter mile tracks.. usually we don't draw too much attention that way

Posted By: pittsburghracer

Re: Roll Cage requirements - 12/13/18 06:54 PM

Originally Posted By WHITEDART

Actually I have been watching this post closely I have been avoiding the chassis update on my car for multiple reasons.. I have been lucky most of the racing that we do is 1/8th mile racing on quarter mile tracks.. usually we don't draw too much attention that way

I write my racing off as a business so licencing, physicals, spot rentals, chassis tech, etc, etc, just kinda plays into it.

Posted By: Cab_Burge

Re: Roll Cage requirements - 12/13/18 08:22 PM

Originally Posted By pittsburghracer

Originally Posted By Cab_Burge

Funny car type cage is required to go from the 8.50 certs to 7.50. My C.M. tube chassis Cuda needs that done to go faster next year, hopefully

It was built a lot of years ago and the funny car cage wasn't required back then, it is now

I'm betting that your car will need more updating than you think IF and I said IF the inspector checks under your car. A lot of inspectors don't but my car was on a rack at the time and it needed 6 bars added because of rule changes over the years when I updated my mild steel Daytona from 8.50 to 7.50.

And my Daytona already had a funny car type of cage.

According to the first NHRA inspector that looked at my car when I had it certified the first time for me here in division 6 said it all it needed was the funny car cage to be certed to 7.50 due to the amount of bars in the chassis under the floorboards, 6 from the rear suspension to the foot bar

This car has gone 6.80s at around 184 MPH before I bought it less engine, it had a blown B1 KB motor on Methanol back then. It sat for 6 yrs. before I got it 5 yrs ago

Hopefully the new, better bigger C.I., better headed motor will run 8.80 or quicker at 150+ MPH

Posted By: pittsburghracer

Re: Roll Cage requirements - 12/13/18 08:29 PM

My blue Duster was built for 6.50 cert but being they are only good for two years instead of three I will have it stickered for 7.50 cert. that will easily cover my ET.

Posted By: Cab_Burge

Re: Roll Cage requirements - 12/13/18 08:33 PM

I have looked at all the SFI chassis specs. years ago, the weight and body type,open or door car, made a lot of differences on the wall thickness on every bar

My Cuda weighs right at 2800 Lbs. with me in it ready to race

Posted By: Biginchmopar

Re: Roll Cage requirements - 12/13/18 09:31 PM

I have a Duster with a 6.0 cert and I don't want that many bars in a car that is uncut. I understand if that's what it takes, that's what it takes. The cage would add enough weight that I wouldn't have to worry about low 8's unless I spray some juice to it.

I was told just add a funny car cage and if that was all that was needed I could do that without adding a lot of weight.

Anyways thanks for the input!

I'm off to buy Gorilla Glue, RTV and Flex Seal.

Posted By: Al_Alguire

Re: Roll Cage requirements - 12/13/18 09:33 PM

FC cage and a few bars on/under/above floor will cover it generally.

Posted By: 6PKRTSE

Re: Roll Cage requirements - 12/14/18 05:47 PM

Originally Posted By Al_Alguire

FC cage and a few bars on/under/above floor will cover it generally.

I was surprised each time i have re-certed my car how the NHRA inspector go/no go gages each bar, sonic checks each bar even the under car bars. I was a little nervous when he stood up aftwer inspecting underneath & asked what chassis shop built this car? I said "my buddies & I did, it's home built" & he said "it is one bad ass m.f'er & I am a Chevy guy". Made me feel pretty good for a guy that inspects thousands of cars a year to compliment mine.

Posted By: 6PKRTSE

Re: Roll Cage requirements - 12/14/18 05:54 PM

Originally Posted By pittsburghracer

Originally Posted By HardcoreB

Originally Posted By merpar

Hey, Big Inch. Just put as much crome moly tubing in there as you can. Then get a gallon of Goriila glue to hold it together. Then you're good to go! Some more sound advice from your uncle.

Not to go against the grain of what you're saying but professionals like Bill Lutz are using RTV now-a-days.

I see what you did there. LOL

You guys joke but I know of one of our local No E.T./Grudge cars that the track officials finally told our buddy with a sleeper 10.5" tire Mustang with no cage & factory lap bet, we know how fast you are going & we would appreciate it if you put a cage in the car. He did, it is all glued together plastic PVC with some roll bar padding on the door bar & head bars to look the part. The officials never said anything again. It is funny watching him climb over the door bar & it flexes as he gets in & out.

Not for me though. I would rather be safe.

Posted By: JERICOGTX

Re: Roll Cage requirements - 12/14/18 06:41 PM

Originally Posted By 6PKRTSE

Originally Posted By pittsburghracer

Originally Posted By HardcoreB

Originally Posted By merpar

Hey, Big Inch. Just put as much crome moly tubing in there as you can. Then get a gallon of Goriila glue to hold it together. Then you're good to go! Some more sound advice from your uncle.

Not to go against the grain of what you're saying but professionals like Bill Lutz are using RTV now-a-days.

I see what you did there. LOL

You guys joke but I know of one of our local No E.T./Grudge cars that the track officials finally told our buddy with a sleeper 10.5" tire Mustang with no cage & factory lap bet, we know how fast you are going & we would appreciate it if you put a cage in the car. He did, it is all glued together plastic PVC with some roll bar padding on the door bar & head bars to look the part. The officials never said anything again. It is funny watching him climb over the door bar & it flexes as he gets in & out.

Not for me though. I would rather be safe.

Not sure why people skimp on safety.

Posted By: Cab_Burge

Re: Roll Cage requirements - 12/14/18 08:00 PM

Originally Posted By 6PKRTSE

[quote=pittsburghracer][quote=HardcoreB][quote=merpar]

You guys joke but I know of one of our local No E.T./Grudge cars that the track officials finally told our buddy with a sleeper 10.5" tire Mustang with no cage & factory lap bet, we know how fast you are going & we would appreciate it if you put a cage in the car. He did, it is all glued together plastic PVC with some roll bar padding on the door bar & head bars to look the part. The officials never said anything again. It is funny watching him climb over the door bar & it flexes as he gets in & out.

Not for me though. I would rather be safe.

You can talk to people, that doesn't mean they will listen

As far as that racer I hope he doesn't crash that car and die from the plastic tube breaking and penetrating his body

Posted By: CMcAllister

Re: Roll Cage requirements - 12/14/18 09:01 PM

Originally Posted By 6PKRTSE

You guys joke but I know of one of our local No E.T./Grudge cars that the track officials finally told our buddy with a sleeper 10.5" tire Mustang with no cage & factory lap bet, we know how fast you are going & we would appreciate it if you put a cage in the car. He did, it is all glued together plastic PVC with some roll bar padding on the door bar & head bars to look the part. The officials never said anything again. It is funny watching him climb over the door bar & it flexes as he gets in & out. Not for me though. I would rather be safe.

B1^@h about NHRA all you like, seat belt rules, chassis certs, all of it. But this kind of stupid s#1^ doesn't happen at divisionals or national events. If a guy is that stupid to go down the track in junk like that, I don't want to be beside him. I've seen too many junk cars wadded up and too many people hurt.

Posted By: Biginchmopar

Re: Roll Cage requirements - 12/14/18 09:11 PM

Originally Posted By Al_Alguire

FC cage and a few bars on/under/above floor will cover it generally.

Al, do you know what SFI spec it would be?

Stock firewall, stock floor, ect...

Posted By: 6PKRTSE

Re: Roll Cage requirements - 12/14/18 09:34 PM

Originally Posted By Cab_Burge

Originally Posted By 6PKRTSE

[quote=pittsburghracer][quote=HardcoreB][quote=merpar]

You guys joke but I know of one of our local No E.T./Grudge cars that the track officials finally told our buddy with a sleeper 10.5" tire Mustang with no cage & factory lap bet, we know how fast you are going & we would appreciate it if you put a cage in the car. He did, it is all glued together plastic PVC with some roll bar padding on the door bar & head bars to look the part. The officials never said anything again. It is funny watching him climb over the door bar & it flexes as he gets in & out.

Not for me though. I would rather be safe.

You can talk to people, that doesn't mean they will listen

As far as that racer I hope he doesn't crash that car and die from the plastic tube breaking and penetrating his body

I agree. Like I said not for me. He has lost his brakes before & went off the end of the track into the sand. Doesn't seem to bother him at all.
I went all out for safety & this is still a street car.

Attached picture 100_1667 [640x480].jpg

Posted By: polyspheric

Re: Roll Cage requirements - 12/14/18 09:38 PM

The officials never said anything again.

Personal injury lawyers get rich on that sort of thing.
My question: how many rich & famous are getting a pass, and everyone was smart enough NOT to tell? See, if someone can go to jail for what they allowed, the chances of them erasing a tape or losing a test report go from zero to 100 in no seconds.
Corruption and privilege always found together.

Posted By: 6PKRTSE

Re: Roll Cage requirements - 12/14/18 09:56 PM

Originally Posted By polyspheric

The officials never said anything again.

Personal injury lawyers get rich on that sort of thing.
My question: how many rich & famous are getting a pass, and everyone was smart enough NOT to tell? See, if someone can go to jail for what they allowed, the chances of them erasing a tape or losing a test report go from zero to 100 in no seconds.
Corruption and privilege always found together.

It's on No E.T./Grudge nights. There is no tech what-so-ever. Whatever you show up in you can race. As always racer sign the waiver upon entering the track so they are on there own. Every car there is faster than it looks. At least it is only 1/8 mile these days so not as bad as it was a few years ago but even with that I know of a few sub 1.0 sec 60' 10.5" tire cars going up to & over 200+ in the 1/8.(at least these guys have cages).

Posted By: Forest

Re: Roll Cage requirements - 12/14/18 11:02 PM

Originally Posted By Biginchmopar

Originally Posted By Al_Alguire

FC cage and a few bars on/under/above floor will cover it generally.

Al, do you know what SFI spec it would be?

Stock firewall, stock floor, ect...

25.5 is 7.50 and slower with stock floors and firewall...

Posted By: Al_Alguire

Re: Roll Cage requirements - 12/15/18 12:49 AM

Yep 25.5 for Moly or 25.4 for Mild..I think .4 is up to C and .5 is up to the D version these days.

Posted By: rowin4

Re: Roll Cage requirements - 12/15/18 05:45 PM

I know a guy that made his roll bar set up out of exhaust pipe. He did a real good job, tig welded also. From just looking at it you couldn't tell it wasn't legal. Well he lost control and rolled it . What a surprise that he put in a legal cage in the next car. By trying to fool the tech guy , your only signing your death certificate.

Posted By: moparx

Re: Roll Cage requirements - 12/15/18 06:05 PM

around 62-63 there was a section of the interstate here that wasn't finished, so many "used" that section, "wink,wink".
one local guy had a slingshot style dragster made entirely of "muffler moly" he ran there. was fairly fast, although the exact times and speeds at legitimate tracks has been lost to father time.
you're mention of exhaust tubing cages reminded me of that car.

Posted By: racerx

Re: Roll Cage requirements - 12/15/18 06:11 PM

I also no of a guy that has parts of his cage using muffler tubing.