Author Topic: Bends in door bars for roll bar/cage?...  (Read 2852 times)

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cjshaker

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Bends in door bars for roll bar/cage?...
« on: September 14, 2018, 11:54:58 PM »
I'm looking at door bars and trying to figure out what's legal and what isn't. There's nothing in the rules that say the door bar must be straight, so can they come across the required area between the shoulders and elbows, then bend down nearer the top of the seat and be nearly horizontal till they bend back down to the front of the down bars, or to the floor in a 5/6 point? This would allow them to be welded and still maintain easy entrance, rather than having the hassle of swing out bars, or having to be porn star limber to climb in and out.

Has anyone installed a 8-10 point bar/cage in a Mustang and still successfully used the rear seat for a passenger? I know they'd likely have to sit crossways because of the main hoop D braces, but what about just gaining entrance?
Doug Smith


'69 R-code Mach 1, 427 MR, 2x4, Jerico, 4.30 Locker
'70 F-350 390
'55 Ford Customline 2dr
'37 Ford Coupe

Rory428

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Re: Bends in door bars for roll bar/cage?...
« Reply #1 on: September 15, 2018, 12:15:29 AM »
Not sure about NHRAs ruling on the dropped side bars, but my Fairmont and old 85 Mustang both used swing out side bars on the drivers side, never really considered them to be much hassle at all. As for the back seat, Hell, they are not really useable even without a roll bar!
1978 Fairmont,FE 427 with 428 crank, 4 speed Jerico best of 9.972@132.54MPH 1.29 60 foot
1985 Mustang HB 331 SB Ford, 4 speed Jerico, best of 10.29@128 MPH 1.40 60 foot.
1974 F350 race car hauler 390 NP435 4 speed
1959 Ford Meteor 2 dr sedan. 428 Cobra Jet, 4 speed Toploader. 12.54@ 108 MPH

afret

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Re: Bends in door bars for roll bar/cage?...
« Reply #2 on: September 15, 2018, 05:32:43 AM »
I figured it would be easy to do and make it much easier to get in and out of so we put a swing out door on the driver's side.   We put one bend near the floor on the front so the bar will clear most of the stuff on the door panels.



I wouldn't put passengers in the back seat of a car with a roll bar.  It's too dangerous especially with the cross bar in there.

jayb

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Re: Bends in door bars for roll bar/cage?...
« Reply #3 on: September 15, 2018, 08:36:10 AM »
I put a bend in the bars on my Mach 1 and never got any grief from the tech inspectors, but I'd agree with the other guys on the swing-out side bars, they are much easier.  Plus, you can unbolt them and take them off when you are not at the race track.  I have swing-out side bars on all my race cars, to make them easily streetable. 
Jay Brown
- 1969 Mach 1, Drag Week 2005 Winner NA/BB, 511" FE (10.60s @ 129); Drag Week 2007 Runner-Up PA/BB, 490" Supercharged FE (9.35 @ 151)
- 1964 Ford Galaxie, Drag Week 2009 Winner Modified NA (9.50s @ 143), 585" SOHC
- 1969 Shelby Clone, Drag Week 2015 Winner Modified NA (Average 8.98 @ 149), 585" SOHC

   

Rory428

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Re: Bends in door bars for roll bar/cage?...
« Reply #4 on: September 15, 2018, 10:18:44 AM »
Not to mention, if you have to work inside the car, especially under the dash, being able to remove the side bar is certainly a good thing! A swing out bar may not be quite as rigid as a solid straight bar, but I would think that a radically curved bar would not be as strong in a crash. AFRETs swing out bar looks great to me.
1978 Fairmont,FE 427 with 428 crank, 4 speed Jerico best of 9.972@132.54MPH 1.29 60 foot
1985 Mustang HB 331 SB Ford, 4 speed Jerico, best of 10.29@128 MPH 1.40 60 foot.
1974 F350 race car hauler 390 NP435 4 speed
1959 Ford Meteor 2 dr sedan. 428 Cobra Jet, 4 speed Toploader. 12.54@ 108 MPH

cjshaker

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Re: Bends in door bars for roll bar/cage?...
« Reply #5 on: September 15, 2018, 11:37:24 AM »
I was talking about a bend that went down and followed the basic line of your legs, but Rory brought up a point that I had not considered, and that's being able to easily work on the cars interior.

Jay, I thought you had bent bars and I was looking at some of your old DW posts trying to find a picture of them but haven't found one yet. I'll keep searching.

Rory, I'm talking about a 9.99 and quicker cage, so I would think a bent bar would have a negligible impact.

I had thought about the safety consideration with the crossbar and thought a shoulder belt in the rear would negate that. I just hate to completely rule out a rear passenger. Just kind of brainstorming here to see if it's feasible, but with the required rigid front seat, I don't know that the rear would even be accessible unless they crawled through the middle. I think Chris Alston makes a bar setup that has a removable crossbar, but I don't think that's NHRA acceptable.

Thanks for the replies.
Doug Smith


'69 R-code Mach 1, 427 MR, 2x4, Jerico, 4.30 Locker
'70 F-350 390
'55 Ford Customline 2dr
'37 Ford Coupe

Falcon67

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Re: Bends in door bars for roll bar/cage?...
« Reply #6 on: September 15, 2018, 02:06:26 PM »
>Not to mention, if you have to work inside the car, especially under the dash, being able to remove the side bar is certainly a good thing!

I'm fixing to cut the cage out of the 70 for just that reason