Lightning

Any interest in bump steer kits???

Old Jun 4, 2003 | 08:50 PM
  #61  
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Sign me up!!
 
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Old Jun 4, 2003 | 09:05 PM
  #62  
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I'll take one too!
 
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Old Jun 4, 2003 | 11:10 PM
  #63  
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Originally posted by SVT_KY
LOL ... I want a longer rod too !~~~~~!


Bump.
 
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Old Jun 4, 2003 | 11:30 PM
  #64  
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NOW for the real question REALISTLY how much are you willing to spend.Since who ever does this is putting their neck out on the chopping block? I figure to make it worth while starting out at 225.00 for the kit.Stan

PS and I am NOT going to do it!
 
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Old Jun 4, 2003 | 11:33 PM
  #65  
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Hmmm I would pay around there...
 
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Old Jun 5, 2003 | 02:30 AM
  #66  
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Originally posted by Ruslow
NOW for the real question REALISTLY how much are you willing to spend.Since who ever does this is putting their neck out on the chopping block? I figure to make it worth while starting out at 225.00 for the kit.Stan

PS and I am NOT going to do it!
Sign me up.
 
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Old Jun 5, 2003 | 03:05 AM
  #67  
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Originally posted by Ruslow

PS and I am NOT going to do it!
You know Tim and I will put a check in the mail tomorrow...
 
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Old Jun 5, 2003 | 05:33 PM
  #68  
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So is bump steer an issue in the Roush kit that i just ordered today??
 
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Old Jun 5, 2003 | 05:38 PM
  #69  
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Originally posted by player19
So is bump steer an issue in the Roush kit that i just ordered today??
Yes...it is unavoidable.
 
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Old Jun 5, 2003 | 06:02 PM
  #70  
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Originally posted by player19
So is bump steer an issue in the Roush kit that i just ordered today??
Anytime you drop your truck in the front over 1.5 inches (or even less maybe?) you may encounter it. Although I thought Roush supplied front bumpstops with their kits? They are supposed to be shorter correct? So you don't have to shave them yourself?
 
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Old Jun 5, 2003 | 07:38 PM
  #71  
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Originally posted by cyntaxx
Anytime you drop your truck in the front over 1.5 inches (or even less maybe?) you may encounter it. Although I thought Roush supplied front bumpstops with their kits? They are supposed to be shorter correct? So you don't have to shave them yourself?
I think you have your bumps confused. In a nutshell when you lower the truck it changes the steering geometry. When you go over bumps this improper steering geometry affects the handling of the vehicle... bump steer. The wheels actually will turn a little when you go over the bump because of the improper geometry. When you dropped the vehicle you also lowered the steering rack. Bump steer kits are designed to get everything back to where it's straight across from end to end. Offset rack bushings which raise or lower the rack and/or different tie rod ends are things people do to fix it. Apparently neither of those things are available for Lightnings in a kit form.

Bump stops just limit suspension travel. Better for a bottoming out suspension to hit a piece of rubber than steel.

Jim
 
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Old Jun 5, 2003 | 07:42 PM
  #72  
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Originally posted by jmimac351
I think you have your bumps confused. In a nutshell when you lower the truck it changes the steering geometry. When you go over bumps this improper steering geometry affects the handling of the vehicle... bump steer. The wheels actually will turn a little when you go over the bump because of the improper geometry. When you dropped the vehicle you also lowered the steering rack. Bump steer kits are designed to get everything back to where it's straight across from end to end. Offset rack bushings which raise or lower the rack and/or different tie rod ends are things people do to fix it. Apparently neither of those things are available for Lightnings in a kit form.

Bump stops just limit suspension travel. Better for a bottoming out suspension to hit a piece of rubber than steel.

Jim
Whoops I understand now. So the bump stops do not cause the improper steering geometry?
 
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Old Jun 5, 2003 | 08:11 PM
  #73  
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When the suspension travels up and down, the wheel moves up and down in an arc or half circle around a pivot point. This pivot point is not a physical location or suspension part but is an imaginary point on the chassis, similar to a vehicle's center of gravity. The distance from the pivot point to the wheel and spindle is equal at all points in the wheel's range of vertical movement. The tie rod and steering rack must be positioned so that as the wheel moves up and down, the tie rod follows an arc which is parallel to the arc followed by the spindle. If the steering rack or tie rod is not positioned correctly, the distance between the steering rack and wheel may differ from the distance between the pivot point to the wheel at different suspension heights. When this occurs the steering rack will push or pull the spindle as the suspension moves up or down thereby turning the wheel and causing a change in toe angle.

The direction the front wheels are pointed is called toe angle. When both wheels are pointed parallel there is 0 degrees toe. When the front of the wheels are pointed inward, there would be positive degree toe or what is called toe in. When the front of the wheels are pointed outward there is negative degree toe or what is called toe out.
 
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Old Jun 5, 2003 | 08:30 PM
  #74  
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WOO HOO !-- i guess i will find out about bumpsteer firsthand in about a week

So on the freeway you have to be extra attentive ? Or this is just an issue on the streets?
 
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Old Jun 5, 2003 | 08:47 PM
  #75  
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Sign me up for a kit!

ForesVt
 
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