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Re: Trans Am E-body roll cage pics?
[Re: RylisPro]
#1606582
05/10/14 04:00 PM
05/10/14 04:00 PM
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Joined: Jan 2003
Posts: 27,617
So Cal
autoxcuda
Too Many Posts
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Too Many Posts
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Posts: 27,617
So Cal
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Quote:
Did you mean something like this?
One negative thing is that it would add a bunch of front end weight and that is what I am definitely trying to avoid
No. I wouldn't do that.
The chassis ends at the front K-member bolt. Anything forward of that is just fluff or because the motor is in the way (which it is of course).
So you do what you can to get your structure as close to the front K-member bolts as possible.
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Re: Trans Am E-body roll cage pics?
[Re: autoxcuda]
#1606585
05/11/14 12:25 AM
05/11/14 12:25 AM
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Joined: Jan 2003
Posts: 27,617
So Cal
autoxcuda
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Too Many Posts
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Posts: 27,617
So Cal
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IMHO, if you run a tube cage I don't think you need to run the inner fender braces.
Here's a rough sketch idea of mine. Trying to route triangulation into the front chassis box. Trying to resist twist.
I don't think you could run a straight cross bar from the front k-member bolt area to the other side. I'm pretty sure that goes right through the crank pulley.
Last edited by autoxcuda; 05/11/14 04:38 PM.
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Re: Trans Am E-body roll cage pics?
[Re: autoxcuda]
#1606586
05/11/14 11:19 AM
05/11/14 11:19 AM
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Joined: Mar 2014
Posts: 40
upper So. CA
ntsqd
member
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member
Joined: Mar 2014
Posts: 40
upper So. CA
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As noted I wouldn't put the X any further fwd than necessary. If there simply isn't room btwn the engine and the radiator for it then fwd of the radiator is the likely only option left. Recall that I said to put the tube intersections where the loads are. That's also what autoxcuda is talking about, feed the K member bolt loads into the tube structure directly. That requires notching into the OE box section or something to get right to the plates that the bolts thread into.
Ideally those bends in the upper tubes would also have a tube running from them to the center of the cowl/dash bar (the "export brace" in Mustang terms), but only if the cowl bar can feed those loads further into the tube structure. I.e. if it too is bent at the center to meet those tubes at the cowl and re-direct the loads to the windshield post tubes, which then distribute the loads throughout the rest of the structure. It's 3 dimensional truss design, think in terms of triangles - anything else will flex.
On a couple drag cars that I've worked on I built a fore/aft engine locator bracket that bolted to the OE engine mounts and had a pretty serious strut that bolted btwn it and and somewhere on the chassis - specifically to stop the plate from bending due to engine inertia.
Last edited by ntsqd; 05/11/14 11:21 AM.
I used to swerve around my hallucinations, now I drive right thru them.
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Re: Trans Am E-body roll cage pics?
[Re: jcc]
#1606589
05/11/14 04:25 PM
05/11/14 04:25 PM
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Joined: Jan 2003
Posts: 27,617
So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,617
So Cal
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Quote:
Quote:
IMHO, if you run a tube cage I don't think you need to run the inner fender braces.
Here's a rough sketch idea of mine. Trying to route triangulation into the front chassis box. Trying to resist twist.
I don't think you could run a straight cross bar from the front k-member bolt area to the other side. I'm pretty sure that goes right through the crank pulley.
....
Not sure but does any of this tubimg need to meet and dia or thickness requirements since not part of the cage?
Not sure how without any bolted connections, motor could be removed from above. But the design looks solid. 
Engine crossbars generally don't have thickness specs. They are not really a safety deal, mostly performance deal.
In the pictures I posted here of the motor plate, that is initial assymbly at the beginning of the season. There are a system of crossbars yet to be bolted on. If you look closely there are small tubes going through the large roll cage tubes. Crossbars (we called it a spider web) bolts to those through tubes.
Yes the crossbars bolt on. And most connections are not bolted with a thru bolt connecting overlapping flanges.
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Re: Trans Am E-body roll cage pics?
[Re: autoxcuda]
#1606591
05/12/14 01:35 PM
05/12/14 01:35 PM
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Joined: Dec 2003
Posts: 23,941
Here
jcc
No soup for you!!!
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No soup for you!!!
Joined: Dec 2003
Posts: 23,941
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Upon further reflection, the 1 of 3 "tweaks" I mentioned, "Three areas I would like to see tweaked, if possible. 1. the short front upper 8"? connector, reduced to close to zero", this one might be a stiffer solution, but likely would have a huge stress concentration, and prone to fatigue and failure, and therefore not an improvement over what you had napkin drawn. Nevermind. 
I forbid my content here from being learned and used by artificial intelligence systems.
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Re: Trans Am E-body roll cage pics?
[Re: RylisPro]
#1606592
06/12/14 06:19 PM
06/12/14 06:19 PM
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Joined: Jun 2007
Posts: 2,432
NorCal
RylisPro
OP
top fuel
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OP
top fuel
Joined: Jun 2007
Posts: 2,432
NorCal
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Since I am getting X bars welded in the doorways would it be beneficial to remove the door beams? I hear it would cut out approx. 25 lbs. per side Thanks
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Re: Trans Am E-body roll cage pics?
[Re: RylisPro]
#1606594
06/13/14 07:00 PM
06/13/14 07:00 PM
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Joined: Jan 2003
Posts: 1,692
Seattle WA
RichV
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,692
Seattle WA
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Quote:
Since I am getting X bars welded in the doorways would it be beneficial to remove the door beams?
I hear it would cut out approx. 25 lbs. per side
Thanks
Are there any vehicles that have a combination of hinges and latches that enables the door to contribute the the chassis stiffness?
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Re: Trans Am E-body roll cage pics?
[Re: RichV]
#1606595
06/13/14 11:18 PM
06/13/14 11:18 PM
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Joined: Dec 2003
Posts: 23,941
Here
jcc
No soup for you!!!
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No soup for you!!!
Joined: Dec 2003
Posts: 23,941
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I took 14? pics 3-12-08 of the mopar e bodies at a Sebring Historic race. The last pic is just for icing, it's the captive spring loaded quickly outlawed lug nut system. And I think cage design has progressed from this era, and in the one with the back seat cooler, you see the 3rd link mounting point interior intrusion.
Last edited by jcc; 06/13/14 11:34 PM.
I forbid my content here from being learned and used by artificial intelligence systems.
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Re: Trans Am E-body roll cage pics?
[Re: jcc]
#1606596
06/13/14 11:18 PM
06/13/14 11:18 PM
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Joined: Dec 2003
Posts: 23,941
Here
jcc
No soup for you!!!
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No soup for you!!!
Joined: Dec 2003
Posts: 23,941
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#2
Last edited by jcc; 06/13/14 11:19 PM.
I forbid my content here from being learned and used by artificial intelligence systems.
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