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New Toy/Tool: Bump Steer Gauge...Now w/Measurements!
#1168329
01/30/12 02:39 AM
01/30/12 02:39 AM
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Joined: Jan 2003
Posts: 27,467
So Cal
autoxcuda
OP
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OP
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So Cal
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Picked up this bump steer gauge at the swap meet this morning for $25. Retails for like $214. It had a dead battery in the drop gauge and the screen was cracked...Put in a battery and all is good. Was also missing a knob set screw. Have a bolt in there for now. http://www.longacreracing.com/catalog/item.asp?id=155&catid=5The plate is 5 on 5 with big lugs, but they are big enough that a 4 1/2 on 5 pattern will fit. I'll just run nuts and washers. I haven't bump steered a car in a while. But not real brain surgery to measure: Bump Steer Instructions The tricky part is making the adjustments by spacing the tie rods ends up or down if you can or finding other places to adjust. A lot of people throw around the term "Bump Steer" and it is not the issue they are feeling in the car. No production vehicle will be perfect. Not even close. And people over react to the bump being off. And even most all race cars are only really good through a limited range of bump and jounce. My new $25 toy...
Last edited by autoxcuda; 02/06/12 03:28 AM.
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Re: New Toy/Tool...Bump Steer Gauge !
[Re: autoxcuda]
#1168331
01/30/12 02:53 AM
01/30/12 02:53 AM
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Joined: Jan 2003
Posts: 27,467
So Cal
autoxcuda
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Also got a remote power steering resivour and some lines.... $10. Those go with the KRC/Saginaw type pumps that can be purchased in aluminun.  This is the pump setup that you can buy with an aluminum pump housing. Nice setup the race guys all use.This one is on the Hotchkis Challenger T/A.
Last edited by autoxcuda; 01/30/12 02:58 AM.
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Re: New Toy/Tool...Bump Steer Gauge !
[Re: 1_WILD_RT]
#1168334
01/30/12 04:11 AM
01/30/12 04:11 AM
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Joined: Jan 2003
Posts: 27,467
So Cal
autoxcuda
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Quote:
What are you shimming to alter tie rod location? Seems like you'd be separating the tapered connection of the tie rod to the balljoint to change the relationship? I think I'd be more comfortable bending the balljoint arm...
I'm running the Hotchkis Heim Jointed tie rod ends. They have an adapter that converts tapered socket to regular thru bolt.
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Re: New Toy/Tool...Bump Steer Gauge !
[Re: cageman]
#1168337
01/30/12 06:36 PM
01/30/12 06:36 PM
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Joined: Feb 2011
Posts: 4,302
Nebraska
72Swinger
master
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master
Joined: Feb 2011
Posts: 4,302
Nebraska
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Ideally you want the tierods to travel through the same arc as the lower control arms, plain and simple but not always easy to obtain.
Mopar to the bone!!!
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Re: New Toy/Tool...Bump Steer Gauge !
[Re: autoxcuda]
#1168340
02/03/12 02:44 PM
02/03/12 02:44 PM
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Joined: May 2005
Posts: 416
Franklin Co. Illinois
runinonmt
mopar
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mopar
Joined: May 2005
Posts: 416
Franklin Co. Illinois
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Lock the steering with a 1x2 long enough to go through the window openings and 2 scrap pieces of wood on the other side of the steering wheel held by c clamps. Also handy for setting toe-in.
Ron
In sixty-five I was seventeen and running up one-o-one
I don't know where I'm running now, I'm just running on
Jackson Browne-Running On Empty
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Re: New Toy/Tool...Bump Steer Gauge !
[Re: runinonmt]
#1168341
02/03/12 02:54 PM
02/03/12 02:54 PM
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Joined: Jan 2003
Posts: 27,467
So Cal
autoxcuda
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Quote:
Lock the steering with a 1x2 long enough to go through the window openings and 2 scrap pieces of wood on the other side of the steering wheel held by c clamps. Also handy for setting toe-in.
Ron
Thanks that sound good for a one man deal. I might start with that.
I have a pretty loose steering box and not the greatest coupler. I think I'll have to/plan to put something on the pitman itself to keep it from moving in the slightest.
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Re: New Toy/Tool...Bump Steer Gauge !
[Re: autoxcuda]
#1168342
02/03/12 03:40 PM
02/03/12 03:40 PM
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Joined: Jun 2004
Posts: 309
Hampden, Maine
Procommuter
super street
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super street
Joined: Jun 2004
Posts: 309
Hampden, Maine
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To lock the steering I clamp a piece of flat bar to the center link or pitman arm and clamp the other end to the K-frame.
Wes
73 Barracuda 440 EFI 4 speed, 144.85 MPH LTA A/FSS Record Holder.
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New Toy/Tool: Bump Steer Gauge...Now w/Measurements!
[Re: Procommuter]
#1168343
02/06/12 03:21 AM
02/06/12 03:21 AM
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Joined: Jan 2003
Posts: 27,467
So Cal
autoxcuda
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Ok, after just mocking it up haphazardly to get the feel of things... A got a better setup using a bottle jack I have rather than using the floor jack that was in the way of the Bump Steer Gauge base and was sweeping the bottom of the LCA as I went through the motions. Symptoms/Cures are from here: http://www.longacreracing.com/articles/art.asp?ARTID=13#Q2Basically is has 1/16 toe out in Bump/Compression and 1/8 toe in in Jounce/Extension. I'm sort of surprised. I don't think it's that bad. I will mess with it though to attempt to get it between .005 and .015 toe out on bump. So...
Last edited by autoxcuda; 02/06/12 03:27 AM.
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Re: New Toy/Tool...Bump Steer Gauge !
[Re: astjp2]
#1168345
02/09/12 11:53 AM
02/09/12 11:53 AM
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Joined: Sep 2003
Posts: 1,688
Marlboro, NY, USA
Rick_Ehrenberg
top fuel
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top fuel
Joined: Sep 2003
Posts: 1,688
Marlboro, NY, USA
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Quote:
Too bad the Heim joints are illegal where I live, wont pass safety. They wont allow any Heims in the steerng or suspension. The safety inspection guidelines says their failure method is too drastic compared to a ball joint....Tim
I second that emotion! They are very scary, fail with zero warning!
Rick
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Re: New Toy/Tool...Bump Steer Gauge !
[Re: astjp2]
#1168346
02/09/12 11:58 AM
02/09/12 11:58 AM
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Joined: Sep 2003
Posts: 1,688
Marlboro, NY, USA
Rick_Ehrenberg
top fuel
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top fuel
Joined: Sep 2003
Posts: 1,688
Marlboro, NY, USA
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Quote:
Lucky SOB, I am never that lucky! Larry Sheppard wrote in the chassis manual to heat and bend the ball joints to move them. Tim
Hmmm, how sure are you? I coulda sworn that he wrote to always bend cold!
I've always been able to get real close by either slotting the idler hole or shimming the chuck mount.
My zero-buck gauge is "good" plywood (clean edge) cinder block, and a piano hinge.
Rick
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Re: New Toy/Tool...Bump Steer Gauge !
[Re: Rick_Ehrenberg]
#1168347
02/10/12 01:02 AM
02/10/12 01:02 AM
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Joined: Jan 2003
Posts: 27,467
So Cal
autoxcuda
OP
Too Many Posts
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OP
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Quote:
My zero-buck gauge is "good" plywood (clean edge) cinder block, and a piano hinge.
Rick
After using this Longacre tool. I don't see it being much more accurate than what you built. The bent square tubing and telescoping adjustments are a little flimsy. But I was able to get fairly repeatable measurements.
But Rick, what you would you have done if one flopped in you lap for $25 and you didn't allready have one? 
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