roll cage installation - Moparts Forums

Register Log In Moparts Forums Unlawfl's Race & Engine Tech roll cage installation

Print Thread

roll cage installation #1399006 03/08/13 01:00 PM 03/08/13 01:00 PM
Joined: Aug 2003 Posts: 7,063 Indiana maxie OP master
maxie OP master Joined: Aug 2003 Posts: 7,063 Indiana	We are in the process of putting the cage in the demon. It is a 8 point kit, nonchromoly. My question is how large do the beads of weld have to be? I emailed division 3, but havent heard anything yet.

Re: roll cage installation [Re: maxie] #1399007 03/08/13 03:19 PM 03/08/13 03:19 PM
Joined: Aug 2003 Posts: 43,190 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,190 Bend,OR USA	Like a lot of other things in life it is not the size of the bead that counts , it is the weld pentration that counts Any body can gob weld onto a bad weld and it won't hold in a crash, so if in doubt, have it done by a competent welder Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: roll cage installation [Re: maxie] #1399008 03/08/13 03:26 PM 03/08/13 03:26 PM
Joined: Mar 2006 Posts: 9,910 Eighty Four, PA B G Racing master
B G Racing master Joined: Mar 2006 Posts: 9,910 Eighty Four, PA	They don't dictate the weld criteria,good welding practices do.A good rule of thumb would be no more than the thickness of the material.If your using .125 to .135 thick tubing and your welding two tubes together try to maintain no more than 2X the thickness of the tube for the with of the weld.A 1/4+- bead would be sufficient.The amont of weld and heat effect zone should always be minimized to prevent elongation and structural changes in the parent metal.Spend a lot of time on fit,it's just as if not more important than the weld.NHRA rules only dictate that CM must be tig welded and MS can be mig welded.We preferr to tig since it forces the welder to make perfect fitting joints. [IMG]http://i430.photobucket.com/albums/qq21/ajcasini/max_zpsdppwd9km.jpg[/IMG]

Re: roll cage installation [Re: maxie] #1399009 03/08/13 03:36 PM 03/08/13 03:36 PM
Joined: Aug 2004 Posts: 721 Seminole County FL to Plymouth... Barry70GTX super stock
Barry70GTX super stock Joined: Aug 2004 Posts: 721 Seminole County FL to Plymouth...	Tig that thing Scott. If you can't do it, get my nephew Mike over there to do it. He's an artist with a tig and he loves cash. NMCA NSS 67 Coronet

Re: roll cage installation [Re: B G Racing] #1399010 03/08/13 04:50 PM 03/08/13 04:50 PM
Joined: Jun 2009 Posts: 223 Ohio H Hemi Joe enthusiast
Hemi Joe enthusiast H Joined: Jun 2009 Posts: 223 Ohio	Bob George Racing installed a cage in my 65 and did a great job!!! I will always be thankful to Bob for the installation, due to the fact that it was an emergency situation in which NHRA failed my exhisting cage during a chassis certification. The regional tech measured my cage on one of corners, where the steel stretches and he told us that the Jegster tubing was not thick enough. Thanks to Bob we were able to make our next race the following week, we will always be greatful!!!!! HEMI JOE -- Endanger Species Racing

Re: roll cage installation [Re: Hemi Joe] #1399011 03/08/13 05:01 PM 03/08/13 05:01 PM
Joined: Feb 2003 Posts: 4,953 Houston, Texas TheOtherDodge master
TheOtherDodge master Joined: Feb 2003 Posts: 4,953 Houston, Texas	Also, go with CM. You will appreciate the weight and size savings.

Re: roll cage installation [Re: maxie] #1399012 03/08/13 05:12 PM 03/08/13 05:12 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Will you be tiging or miging it.... I normally have each leg of the weld 1 material thickness when I tig but with mig its larger with a nice radius at the center... with either type dont under cut

Re: roll cage installation [Re: MR_P_BODY] #1399013 03/08/13 07:44 PM 03/08/13 07:44 PM
Joined: Nov 2004 Posts: 4,330 Lynchburg, VA Leon441 master
Leon441 master Joined: Nov 2004 Posts: 4,330 Lynchburg, VA	I don't do much of any cages with mild steel. And don't do much wire welding on tubing anymore. But, something I would recommend if Mig welding it would be to leave a .065 gap between the tubes I was welding. This way you get more weld in the joint and not just a fat bead on top. If you get someone to tig it you will want the joints as tight as possible as if you were going to super glue it together LOL. Career best 8.02 @ 169 at 3050# and 10" tires small block power.

Re: roll cage installation [Re: Cab_Burge] #1399014 03/09/13 11:27 AM 03/09/13 11:27 AM
Joined: Aug 2003 Posts: 7,063 Indiana maxie OP master
maxie OP master Joined: Aug 2003 Posts: 7,063 Indiana	The plan is to tig it. I just wasnt sure on how large of bead was required by NHRA. I started tig welding in 1999, I started out by welding the impressions back into forging dies for the Chrysler Corporation. Basicly those were HIGH heat welds and didnt look like your roll of dimes type weld. I know I need to turn the heat down to get the dimes. Thanks for the input

Re: roll cage installation [Re: maxie] #1399015 03/09/13 02:42 PM 03/09/13 02:42 PM
Joined: Nov 2004 Posts: 4,330 Lynchburg, VA Leon441 master
Leon441 master Joined: Nov 2004 Posts: 4,330 Lynchburg, VA	I would worry more about good welds than the roll of dimes. I have seen some very attractive welds broken. I'm sure you can do a good job. Like others said at least the thickness of the tube no more than 1.5 times the tube thickness if you can help it. Leon Career best 8.02 @ 169 at 3050# and 10" tires small block power.

Re: roll cage installation [Re: Hemi Joe] #1399016 03/09/13 06:49 PM 03/09/13 06:49 PM
Joined: May 2005 Posts: 221 Missouri C Challenger enthusiast
Challenger enthusiast C Joined: May 2005 Posts: 221 Missouri	Quote: Bob George Racing installed a cage in my 65 and did a great job!!! I will always be thankful to Bob for the installation, due to the fact that it was an emergency situation in which NHRA failed my exhisting cage during a chassis certification. The regional tech measured my cage on one of corners, where the steel stretches and he told us that the Jegster tubing was not thick enough. Thanks to Bob we were able to make our next race the following week, we will always be greatful!!!!! HEMI JOE -- Endanger Species Racing Correct me if Im wrong,but I was under the impression that the NHRA techs do not measure corners where the steel stretched only on straights. Could this be a area where it depends on what tech you get?

Re: roll cage installation [Re: Challenger] #1399017 03/09/13 07:03 PM 03/09/13 07:03 PM
Joined: Mar 2006 Posts: 9,910 Eighty Four, PA B G Racing master
B G Racing master Joined: Mar 2006 Posts: 9,910 Eighty Four, PA	Quote: Quote: Bob George Racing installed a cage in my 65 and did a great job!!! I will always be thankful to Bob for the installation, due to the fact that it was an emergency situation in which NHRA failed my exhisting cage during a chassis certification. The regional tech measured my cage on one of corners, where the steel stretches and he told us that the Jegster tubing was not thick enough. Thanks to Bob we were able to make our next race the following week, we will always be greatful!!!!! HEMI JOE -- Endanger Species Racing Correct me if Im wrong,but I was under the impression that the NHRA techs do not measure corners where the steel stretched only on straights. Could this be a area where it depends on what tech you get? Usually 6" from any radius or weld connection. [IMG]http://i430.photobucket.com/albums/qq21/ajcasini/max_zpsdppwd9km.jpg[/IMG]

Re: roll cage installation [Re: maxie] #1399018 03/10/13 03:03 AM 03/10/13 03:03 AM
Joined: Aug 2005 Posts: 989 WI, USA 6 67dodge67 mopar addict
67dodge67 mopar addict 6 Joined: Aug 2005 Posts: 989 WI, USA	Quote: We are in the process of putting the cage in the demon. It is a 8 point kit, nonchromoly. My question is how large do the beads of weld have to be? I emailed division 3, but havent heard anything yet. Here's a sample weld on my Coronet. 8 point welded in, not chro-mo. Never had any issues with tech at 'Da Grove here in WI. Dave 7620141-weld.JPG (42 downloads)

Re: roll cage installation [Re: 67dodge67] #1399019 03/10/13 11:26 AM 03/10/13 11:26 AM
Joined: Nov 2004 Posts: 231 M MrNormTA enthusiast
MrNormTA enthusiast M Joined: Nov 2004 Posts: 231	I thought after 6 months sitting in the shop it would be done by now!

Re: roll cage installation [Re: Challenger] #1399020 03/10/13 03:49 PM 03/10/13 03:49 PM
Joined: Jun 2009 Posts: 223 Ohio H Hemi Joe enthusiast
Hemi Joe enthusiast H Joined: Jun 2009 Posts: 223 Ohio	Let us put it this way. Our tech "Pinky" who is no longer with us, failed the two cars before us and he failed our car, then he failed the two cars after us. It was quite apparent that he did not want to travel from the Columbus area to Thompson Raceway Park on that Saturday morning. He also asked me how old I was and I told him that I was 56, then he told me if I planned on reaching the age of 57, that I needed to get my Mopar Performance frame connectors off the chassis of the car. Believe me their was no telling Pinky to move his tubing thickness guage to another location to measure thickness. I tried telling him that my tubing kit was a Jegster Kit and he told me that didn't mean a thing, he said that doesn't mean that it was any good. I told him that I didn't believe that Jeg's would intentionally would sell a kit that was illegal. That's when he called for the next car! RIP - PINKY -- HEMI JOE -Endangered Species Racing --THANKS AGAIN -- BGR RACING

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1