Suspension and Chassis Questions about your suspension? Need chassis advice?

SubFrame Connector or Roll Cage?

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Old Nov 8, 2001 | 07:01 PM
  #1  
stuart69427's Avatar
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From: Fort Belvoir, VA USA
Car: 94 Camaro
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Transmission: 4l60e
SubFrame Connector or Roll Cage?

Which would be better...

Spohn SubFrame connector or a 6PT Roll Cage from year one that doesn't interfer with the passengers?

Which holds the car together better? I have a T-Top and really need to st]rengthen my car and would like to know if ubframe connecttors or Roll Cages work better?

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Old Nov 9, 2001 | 06:56 AM
  #2  
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From: Fort Belvoir, VA USA
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bringing topic to top
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Old Nov 9, 2001 | 02:53 PM
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if it was me, i would do the sub frames, cause even if you do the roll cage (which will help) it doesn't adress the problem of connecting the unibody frame together like it should be.

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Dewey 3:16
90 RS 305 TBI LO3
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Old Nov 9, 2001 | 02:57 PM
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Transmission: WCT5
hey,

I'm not an expert but I'll give you my insight.

If you're worried about getting in and out of the car and passengers, don't bother with a cage. It's not going to do much good if it's gotta stay outta the way of the "cargo". Unless you're worried about rolling over, then it's better than nothing.

Subframe connectors seem to be the standard procedure for setting a good baseline. I think a basic cage will get you just as stiff, but most guys do the connectors then ad a cage later. Usually the cage comes when the car is taken off the street (for all intents and purposes).

just a little rambling...HTH
Clem


------------------
SCCA TransAm Series Race Mechanic/CrewChief
-------------
1983 Z28 with LG4, 5 speed, and (unfortunately) T-tops
1983 Z28, NO T-tops, (unfortunately) Auto Transmission (hopefully not for long)
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Old Nov 9, 2001 | 10:26 PM
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From: Charleston, WV, USA
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Transmission: Art Carr built Th700r4
I may as well cast my vote.

I've never met a "good" 6 point bar that didn't get in the way.

That being said, I think a quality designed and correctly installed 6 point bar should stiffen the chassis at least as much if not more than subframe connectors.
•The front two points tie into floor in about the same area as the front of the subframe connectors would.
•The middle two points tie into about the same area as the rear of the subframe connectors would. These also provide lateral (side to side) support here that subframe connectors don't.
•The rear two points tie into the floor over or behind (depending on design) the rear axle.

All of these points are tied together at the main hoop and stiffen the chassis both longitudinally and laterally.

Keep in mind that all of these bars are triagulated making them much stiffer than a straight beam like subframe connectors.

You could also add a halo and uprights for it to stiffen the chassis even more.


Subframe connectors do substantialy stiffen the chassis though, and the passengers won't even know that they are there at all.




[This message has been edited by IROCKZ4me (edited November 12, 2001).]
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Old Nov 10, 2001 | 08:51 AM
  #6  
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ede
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no question SFCs, they're made to stiffen the chassis up. a roll cage isn't made for stiffening the chassis even if they do it, in a round about way, the cage is for roll over protection. plus to install a cage you'd have to pretty much strip the interior.

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Old Nov 11, 2001 | 07:28 PM
  #7  
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From: Fort Belvoir, VA USA
Car: 94 Camaro
Engine: 3.4L
Transmission: 4l60e
thanx

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'88 2.8 V6 Sport Coupe
Navy Blue w/ light Grey GFX
'shorty' Rear Wing



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Old Nov 11, 2001 | 07:33 PM
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I vote SFC's. Unless you are swapping engines and making a drag car.

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Old Nov 13, 2001 | 10:38 AM
  #9  
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From: Columbia MO
Car: 1983 Z28
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<font face="Verdana, Arial" size="2">Originally posted by ede:
...a roll cage isn't made for stiffening the chassis even if they do it, in a round about way, the cage is for roll over protection.
</font>
I'll have to disagree with you on that one

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