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Roll bar main hoop question #1304342 09/15/12 06:15 PM 09/15/12 06:15 PM
Joined: Jun 2010 Posts: 591 Champion City The Sphinx OP mopar
The Sphinx OP mopar Joined: Jun 2010 Posts: 591 Champion City	Is it better to weld the main hoop to the 6X6 plates or would it be better to just run a 2X3 brace from the subframe connecter to the rocker panel and weld the hoop to. Subframe connecters come through the floor as would the 2X3 brace. My main worry is that the floor pan (its rust free) is about as thick as a common Miller light beer can.

Re: Roll bar main hoop question [Re: The Sphinx] #1304343 09/15/12 10:48 PM 09/15/12 10:48 PM
Joined: Nov 2003 Posts: 672 Roanoke Va gearjammerdart mopar
gearjammerdart mopar Joined: Nov 2003 Posts: 672 Roanoke Va	You can use 2x2 1/8" wall from the sub frame connector to the rocker but make sure you plate the rocker. I use the 6x6 1/8" plate cut down to fit. 69 Dart swinger 417 W8 Liberty 5 speed 6.03 @114/9.49 @141 on motor 5.30 @131 on juice 1/8th mile 28x10.5's at 3200lbs 70 Challenger RT 440 4-speed 4:10 Dana http://www.youtube.com/watch?v=VowFy4nDdfI

Re: Roll bar main hoop question [Re: The Sphinx] #1304344 09/15/12 11:47 PM 09/15/12 11:47 PM
Joined: Jan 2003 Posts: 5,894 Florida Locomotion master
Locomotion master Joined: Jan 2003 Posts: 5,894 Florida	Unless you are already planning it, it will help chassis stiffness if you run "inboard" bars behind the seats from the main hoop/crossbar junction to the frame connectors as well.

Re: Roll bar main hoop question [Re: Locomotion] #1304345 09/16/12 09:57 AM 09/16/12 09:57 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Unless you are already planning it, it will help chassis stiffness if you run "inboard" bars behind the seats from the main hoop/crossbar junction to the frame connectors as well. Yep

Re: Roll bar main hoop question [Re: gearjammerdart] #1304346 09/16/12 06:43 PM 09/16/12 06:43 PM
Joined: Nov 2004 Posts: 4,330 Lynchburg, VA Leon441 master
Leon441 master Joined: Nov 2004 Posts: 4,330 Lynchburg, VA	Quote: You can use 2x2 1/8" wall from the sub frame connector to the rocker but make sure you plate the rocker. I use the 6x6 1/8" plate cut down to fit. Yep simply welding to the rocker is OK with mild steel but, better to plate and weld plate to the rocker with MIG. Then especially if using 1 5/8 moly tube you can TIG the support member to the plate. I like using round tube for this and do not weld any portion of the cage or support members to the car until everything is welded all the way around. Then simply put everything back in the permament position and crying about welds you can't make you can leave to people who know no better. Leon Career best 8.02 @ 169 at 3050# and 10" tires small block power.

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