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Re: CM cage [Re: CMcAllister] #2464267
03/10/18 01:31 PM
03/10/18 01:31 PM
Joined: Jan 2004
Posts: 8,192
fredericksburg,va
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cudaman1969 Offline
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fredericksburg,va
Originally Posted By CMcAllister
Originally Posted By cudaman1969
Sheet metal is just hanging there, but like my inspector said, you have two cages, body and roll cage.


Exactly. The formed sheet metal body is also a stiff and substantial structure. Use it. With some planning, the body and the new chassis/cage can be made to support and reinforce each other, making the assembly stronger than if the body was just along for the ride. Tie them together, beyond the mounting points called for to get the cage in the car, to create one assembly

You said it better than me, thanks

Re: CM cage [Re: cdwmotorsports] #2464496
03/10/18 11:08 PM
03/10/18 11:08 PM
Joined: Mar 2006
Posts: 9,791
MI, usa
dvw Offline
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dvw  Offline
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Much easier to remove a section of the floor. Weld in the cage and outriggers. Then trim and weld the floor cutouts back in.
Doug

RC23.jpgRC24.jpg
Re: CM cage [Re: polyspheric] #2464920
03/11/18 08:50 PM
03/11/18 08:50 PM
Joined: Mar 2003
Posts: 1,417
Martinsville, IN
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cdwmotorsports Offline OP
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Martinsville, IN
Originally Posted By polyspheric
My point was that when people who weren't interested enough to post correct information assume that no one else has, they're just wasting my time.

My new rule: assume everyone already knows everything, and never makes mistakes.
Yup, that'll work.


I’m not sure who you are referring to, however I have noted on numerous occasions rather than interject positive helpful replies you post your feelings and then get butt hurt when not everyone agrees with you. My statement is correct, going to a CM cage allows me to use smaller bars, why because I have a MS 10pt cage already. So you assuming you know everything about my car gets old. So please do us all a favor and either start posting useful info or just don’t post. I don’t have time for you getting all butt hurt.


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Re: CM cage [Re: cdwmotorsports] #2465010
03/11/18 11:44 PM
03/11/18 11:44 PM
Joined: Oct 2007
Posts: 4,205
New York
polyspheric Offline
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polyspheric  Offline
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New York
My mistake, I didn't realize how important you are.


Boffin Emeritus
Re: CM cage [Re: polyspheric] #2465034
03/12/18 12:28 AM
03/12/18 12:28 AM
Joined: Mar 2003
Posts: 9,091
Rogue River, OR
Jeremiah Offline
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Rogue River, OR
Thanks for the pictures Doug. I appreciate the real world perspective. While theory is nice seeing practical applications in living color really helps and gives me hope that my project will turn out (half) as good.

Oh, and my feeling is also hurt because nobody bowed down and thanked me for my ambiguous post filled with information you didn't ask for lol.

Also, to answer your original question - you can use mild steel 2xwhatever for outriggers and utilize your MIG to tack the CM together and it won't hurt. The TIG process will use mild steel filler rod so it will be compatible for lack of better terms.

Re: CM cage [Re: polyspheric] #2465067
03/12/18 02:38 AM
03/12/18 02:38 AM
Joined: Oct 2011
Posts: 3,036
bean town ....Ca
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WHITEDART Offline
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bean town ....Ca
Originally Posted By polyspheric
My mistake, I didn't realize how important you are.
another useless statement.. what's up with the personal attacks..


In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: CM cage [Re: WHITEDART] #2465068
03/12/18 02:44 AM
03/12/18 02:44 AM
Joined: Jul 2004
Posts: 19,317
State of confusion
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Thumperdart Offline
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State of confusion
Originally Posted By WHITEDART
Originally Posted By polyspheric
My mistake, I didn't realize how important you are.
another useless statement.. what's up with the personal attacks..


Agree, another guy w/no car and who THINKS he's smarter than everyone else..... tsk


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: CM cage [Re: Jeremiah] #2465303
03/12/18 05:23 PM
03/12/18 05:23 PM
Joined: Mar 2003
Posts: 1,417
Martinsville, IN
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cdwmotorsports Offline OP
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Martinsville, IN
Originally Posted By Jeremiah
Thanks for the pictures Doug. I appreciate the real world perspective. While theory is nice seeing practical applications in living color really helps and gives me hope that my project will turn out (half) as good.

Oh, and my feeling is also hurt because nobody bowed down and thanked me for my ambiguous post filled with information you didn't ask for lol.

Also, to answer your original question - you can use mild steel 2xwhatever for outriggers and utilize your MIG to tack the CM together and it won't hurt. The TIG process will use mild steel filler rod so it will be compatible for lack of better terms.


Jeremiah, your info was useful I’m not sure why you felt as though you should’ve been included.


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Re: CM cage [Re: dvw] #2465305
03/12/18 05:26 PM
03/12/18 05:26 PM
Joined: Mar 2003
Posts: 1,417
Martinsville, IN
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cdwmotorsports Offline OP
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Martinsville, IN
Originally Posted By dvw
Much easier to remove a section of the floor. Weld in the cage and outriggers. Then trim and weld the floor cutouts back in.
Doug


Doug, I greatly appreciate the pictures. If you could I would like to see pics of how it’s all laid out on the bottom side. I’m pretty sure we put the cross bars from the 2x4 box frame connectors in the floor by the rear seat but I’m almost 100% sure we didn’t do them up front. Headed out to look now.


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Re: CM cage [Re: cdwmotorsports] #2465589
03/13/18 12:58 AM
03/13/18 12:58 AM
Joined: Mar 2003
Posts: 9,091
Rogue River, OR
Jeremiah Offline
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Jeremiah  Offline
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Rogue River, OR
Originally Posted By cdwmotorsports
Originally Posted By Jeremiah
Thanks for the pictures Doug. I appreciate the real world perspective. While theory is nice seeing practical applications in living color really helps and gives me hope that my project will turn out (half) as good.

Oh, and my feeling is also hurt because nobody bowed down and thanked me for my ambiguous post filled with information you didn't ask for lol.

Also, to answer your original question - you can use mild steel 2xwhatever for outriggers and utilize your MIG to tack the CM together and it won't hurt. The TIG process will use mild steel filler rod so it will be compatible for lack of better terms.


Jeremiah, your info was useful I’m not sure why you felt as though you should’ve been included.


I'm just messing with you buddy lol. Please take my middle comment with much sarcasm.

Re: CM cage [Re: Jeremiah] #2465594
03/13/18 01:18 AM
03/13/18 01:18 AM
Joined: Mar 2003
Posts: 9,091
Rogue River, OR
Jeremiah Offline
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Jeremiah  Offline
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Posts: 9,091
Rogue River, OR
After re-looking at my setup over the weekend I am all in on the 2x3 outriggers in for the front bars. What I like about it among all the other reasons discussed is that the 2x3 is flat and level which gives you something decent to measure off of.

Another thing to note on my car is much wider at the windshield than behind the front seats. This means that the hoop is much narrower than the span across the a-pillar bars. Is there a rule pertaining to how far door bars can kick out (in degrees, looking from the top of the car) to meet the a-pillar bars? I did not find anything in the rule book but thought I'd ask here.

I assume the other body style of the era have the same issue to tackle if you want the bars tucked up good.

FastMop has some good pics too, he might post them up.

Re: CM cage [Re: cdwmotorsports] #2465649
03/13/18 08:56 AM
03/13/18 08:56 AM
Joined: Jan 2005
Posts: 4,243
Charlotte, North Carolina
sgcuda Offline
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Charlotte, North Carolina
I built my chassis to cert for 7.50's. There is no ruling on angles or parallelism for the bars. Built how you want for your car, but use the required tubing measurements.


[image][/image]
Re: CM cage [Re: cdwmotorsports] #2465654
03/13/18 09:23 AM
03/13/18 09:23 AM
Joined: Mar 2006
Posts: 9,791
MI, usa
dvw Offline
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MI, usa
If you have any questions that are a grey area E mail your NHRA Division tech director. That's what I did. At the time Rich Bowers was our div 3 director. He answered all questions promptly. That way you know it's correct.
Doug

Re: CM cage [Re: cdwmotorsports] #2465815
03/13/18 03:25 PM
03/13/18 03:25 PM
Joined: Dec 2005
Posts: 11,408
Fulton County, PA
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CMcAllister Offline
Mr. Helpful
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Fulton County, PA
As long as the driver is inside of that 1.625 cage, they aren't fussy about fit when it comes to cert. Take the time to get the bars fitted out and up close to the doors and body, out of the line of sight out the windshield, etc. When you can't see the tree because of the A pillar bar, or don't fit in the car, it's too late once it's welded.


If the results don't match the theory, change the theory.
Re: CM cage [Re: cdwmotorsports] #2465875
03/13/18 05:02 PM
03/13/18 05:02 PM
Joined: Jan 2003
Posts: 5,762
Hot Rod Ridge
FastmOp Offline
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Hot Rod Ridge
I'd have the bars come back along the top of the door then have them bend in at the hoop

Re: CM cage [Re: FastmOp] #2465882
03/13/18 05:13 PM
03/13/18 05:13 PM
Joined: Feb 2005
Posts: 20,116
PA.
pittsburghracer Offline
"Little"John
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Posts: 20,116
PA.
After 44 years of racing and having cars certified to 7.50 I finally made the big time and have a chrome moly cage in one. Who knows what’s next for me.


1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: CM cage [Re: FastmOp] #2465956
03/13/18 07:24 PM
03/13/18 07:24 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Posts: 52,972
Romeo MI
Originally Posted By FastmOp
I'd have the bars come back along the top of the door then have them bend in at the hoop


I like to keep all the bars as straight as possible so
a slight angle at the main hoop will get you out to
where you need at the A pillar.. straight bars
are stronger
wave

Last edited by MR_P_BODY; 03/13/18 07:30 PM.
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