front end bump steer, etc
#536125
11/24/09 11:15 PM
11/24/09 11:15 PM
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Joined: Oct 2003
Posts: 111 Eldridge, IA
HR5058
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OP
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Posts: 111
Eldridge, IA
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Guys, I need some help. I have a 71 duster that has horrible front end travel and bump steer. I have always had trouble with the front end 'sailing' on me after the launch and it comes back down and also when I am going down the track. I didnt realize how bad it was until I saw a video and that is when I parked it and started to take it apart. I bought the car already with a disc brake swap. After I started dissamble, and reading some articles I saw lots of problems. First the upper and lower control arms are from the original drums and the armpivot is bent badly and the bushing is shot. The pitman arm, idler arm, and upper and lower ball joints are stock. The spindles measure what I believe are from a Volare. Lastly, the strut rods have been welded on and lengthened. Where and what should I be changing. I have read that you need upper and lower control arms, pitman arm, ider arm, upper and lower ball joints, and spindles from a donor 73 to 76 Duster. Is this correct? I dont have the cash to go tubular but the way it is now is far from being safe. Car runs 10.0 with small block. Thanks Chuck
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Re: front end bump steer, etc
[Re: HR5058]
#536126
11/25/09 12:38 AM
11/25/09 12:38 AM
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Joined: Jun 2005
Posts: 6,257 gulfport, ms, west mi
rowin4
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master
Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
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I think there is some thing in the tech archives on what you need to do a stock mopar change over. Yes it sounds like a cobb job and your right to park it until you get the correct safe parts on it. When you get it all back together, find a old school front end alignment guy that know how to set up a drag race car. Most shops now say we don't have a computer program for that old of a car , [ but ] we can get it close. Run from those guy's.
it's ok to butt heads, just don't do it with a butthead
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Re: front end bump steer, etc
[Re: DragDart360]
#536128
11/26/09 05:09 PM
11/26/09 05:09 PM
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Joined: Oct 2003
Posts: 111 Eldridge, IA
HR5058
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Eldridge, IA
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Thanks for the info. Both sides are off and I am starting from scratch. I am being told that the lowers are the same from 70 to 76, is that correct? Anyone know where I might find an old tech article about the swap ? Thanks Chuck
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Re: front end bump steer, etc
[Re: HR5058]
#536130
11/26/09 05:19 PM
11/26/09 05:19 PM
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Joined: Oct 2003
Posts: 111 Eldridge, IA
HR5058
OP
member
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OP
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Joined: Oct 2003
Posts: 111
Eldridge, IA
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got to be smarter then the computer, I found manny articles. Thanks Chuck
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Re: front end bump steer, etc
[Re: HR5058]
#536134
11/26/09 06:25 PM
11/26/09 06:25 PM
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Joined: Jan 2003
Posts: 27,468 So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,468
So Cal
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Quote:
I cant find the last alignment sheet but I believe it was at zero which is all the adjustment it had. Scary but I think it moves about an inch. If I can figure how to post the video I have I will.
Thanks Chuck
Opps, my mistake. A lengthened strut rod will decrease positive caster. It will also move the front wheels back and decrease the wheelbase (assuming the rear end is in the stock position) I have no idea why someone would do that.
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