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Old 01-18-2014, 09:06 PM   #1
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Default Have HD doorbars, adding FM frame rails..am I retarded

ive had the HD doorbars on for awhile now but am getting sick of chassis shake/shimmy on bumps, To anyone who had the doorbars before framerails did you notice any difference installing the rails ?

Im running 600/300 Xidas on my car and am just sick of the shake/shimmy im thinking with that high of spring rate I might notice a difference adding the rails
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Old 01-18-2014, 11:29 PM   #2
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ive had the HD doorbars on for awhile now but am getting sick of chassis shake/shimmy on bumps, To anyone who had the doorbars before framerails did you notice any difference installing the rails ?

Im running 600/300 Xidas on my car and am just sick of the shake/shimmy im thinking with that high of spring rate I might notice a difference adding the rails
From my understanding the door bars negate the need for frame rails. I could be wrong though.
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Old 01-18-2014, 11:31 PM   #3
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Do it. For only 120 or whatever even the other benefits of them make it worth it
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Old 01-19-2014, 12:23 AM   #4
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I'd install frog arms at that point, not frame rails.
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Old 01-19-2014, 12:38 AM   #5
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Do it. For only 120 or whatever even the other benefits of them make it worth it
This. Extra bracing plus protection for your frame rails plus big easy to reach jacking points.
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Old 01-19-2014, 09:48 AM   #6
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It is not that one chassis reinforcement negates another. Depending on how much power you are making, what tires you are using, and the general use of the car will dictate exactly how much stiffness you need in your chassis.

If your seat of the pants feeling is that you need more chassis stiffness, then you probably need more chassis stiffness.
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Old 01-19-2014, 10:21 AM   #7
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I have door bars, I'm gonna get frame rails too just for mainly a better jacking point. My drivers side rail has a little kink in it that I'm not happy about.
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Old 01-19-2014, 10:28 AM   #8
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Old 01-19-2014, 10:44 AM   #9
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I like that, but I'm not about to cut out my floor. I don't even want to remove my carpet!
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Old 01-19-2014, 03:34 PM   #10
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Frog arms were an expensive but dramatic upgrade to my chassis with no other changes. I have a set of FM rails ready to go on the car now that one of my tissue paper framerails is flattened into the bellypan thanks to the jackhole at either the transmission or exhaust shop (This is why I now do all my own work.)

You may also consider stitch welding the seams if you can find someone with a TIG and the time to do it. Yes a MIG works, but the TIG is soooooo much cleaner. Disassembly and prep are a bitch, but its very much worth it.
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Old 01-20-2014, 12:29 AM   #11
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You may also consider stitch welding the seams if you can find someone with a TIG and the time to do it. Yes a MIG works, but the TIG is soooooo much cleaner. Disassembly and prep are a bitch, but its very much worth it.
I plan on seam welding the door openings here soon, After that my next attempt to cure the shakes will be frog arms
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Old 01-20-2014, 10:37 PM   #12
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I have door bars and frame rails. Feels better than stock by a good margin.
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Old 01-20-2014, 11:48 PM   #13
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Frame rails are a must just for the scuff/dent protection.
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Old 01-21-2014, 03:08 AM   #14
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My main reason against adding about frame rails is every single hole I drill in the frame seems like just an opportunity for rust. Maybe I'm being an idiot, but I'll stick with the six extra holes I need for the door bars and call it a day.
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Old 01-21-2014, 07:48 AM   #15
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I had my door area stitch welded and then added the Frame Rails, to be honest it didnīt feel much different with the rails on. But since my rails were pretty dented I thought that it wouldn’t hurt.
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Old 01-21-2014, 02:42 PM   #16
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After adding door bars the differance the frame rails made in handling or stiffness was not even detectable. They became dead weight so I took them off. I actually welded in landing plates for my hard dog door bars and made a better connection into the sill structure though.
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Old 01-21-2014, 07:01 PM   #17
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My main reason against adding about frame rails is every single hole I drill in the frame seems like just an opportunity for rust. Maybe I'm being an idiot, but I'll stick with the six extra holes I need for the door bars and call it a day.
So spray/paint the area with an epoxy paint before assembly. It isn't hard. Hell, most NEVER remove the frame rails after installing them. Coat the area with underbody spray rubber.

I have a "cage" in my car but still have the frame rails. I like the skidplate nature they give the bottom of the car. Mainly because I scrap the bottom of the race car like a fiend just getting the car on/off the trailer.
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Old 01-22-2014, 01:20 AM   #18
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You may also consider stitch welding the seams if you can find someone with a TIG and the time to do it. Yes a MIG works, but the TIG is soooooo much cleaner. Disassembly and prep are a bitch, but its very much worth it.
Ohh god yes, Iv done this for a few local forum members and it takes a while but I found a rhythm to doing it. My personal car was mig welded a few years back and I'm currently grinding it all off and tig welding it. Soo much cleaner and its gonna be stronger.
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Old 01-23-2014, 11:18 AM   #19
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I find the frame rails to be nice out side of just stiffening. It's just nice to have them there for structural reasons looking under the car
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Old 01-23-2014, 01:44 PM   #20
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Originally Posted by Twibs415 View Post
Ohh god yes, Iv done this for a few local forum members and it takes a while but I found a rhythm to doing it. My personal car was mig welded a few years back and I'm currently grinding it all off and tig welding it. Soo much cleaner and its gonna be stronger.
I know, right? I saw your thread on NCR and really wanted to jump in but couldn't make the timing work. Gesso has a TIG so I'll beg his services once he gets his current project sorted out.
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