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 Post subject: Bump steer help
 Post Posted: Thu Jul 14, 2016 11:05 am 
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Amateur Racer

Joined: Wed Sep 26, 2012 8:53 pm
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Location: Columbia, MO
Hello, long time no see. I need some info for my front end. Have a 78 wagon. Plan on building an aluminum headed 383. Air, heat, cruise stripped from car. I have polygraphite bushing in the arms and stock replacement tie rods and ball joints. I have a set of extreme blazer spindles I want to use and plan on ordering moog 5606 springs for the front. Anything I need to change to kill bump steer before I put all this together?

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1978 chevy malibu wagon
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89 s10-beat the ever livin #### out of truck

2013 crane carrier front loader

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 Post subject: Re: Bump steer help
 Post Posted: Thu Jul 14, 2016 4:26 pm 
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If you're drag racing the car, don't worry about bump steer. There hardly is any from the factory. Autocrossing, that's another issue.

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1978 Malibu Coupe SBC TH350
1979 Malibu Coupe BBC M21 4 speed the "Big Gun"
1979 Malibu Coupe LQ9 TCI 6X
1979 Malibu Wagon 305 TPI 700R4


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 Post subject: Re: Bump steer help
 Post Posted: Thu Jul 14, 2016 9:11 pm 
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Call Savitske. I never thought these old ######## can turn so well. Car is much better then factory.

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 Post subject: Re: Bump steer help
 Post Posted: Tue Jul 19, 2016 9:01 am 
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MalibuRacing Authorized Advertiser
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Bump Steer can get complicated when you get into specifics and measuring.

In a "nutshell" you want your tie rods as parallel to the ground as you can get them. Bump Steer is improper length or angle of your suspension and steering linkages due mostly in part from changing the ride height or tire size.

Craig

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 Post subject: Re: Bump steer help
 Post Posted: Sat Aug 06, 2016 7:12 am 
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MalibuRacing Junkie
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Location: Upstate NY
Use the longer upper ball joints to help your camber curve too. Those help handling immensely.

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 Post subject: Re: Bump steer help
 Post Posted: Fri Sep 09, 2016 1:35 am 
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Amateur Racer

Joined: Wed Sep 26, 2012 8:53 pm
Posts: 144
Location: Columbia, MO
The other issue I'm having is the tie rod mounts on the spindle are longer with the blazer setup, my tie rods stick out further. Should I run the blazer pitman and idler arms and see of that helps? Car will be driven

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1978 chevy malibu wagon
383 in progress

89 s10-beat the ever livin #### out of truck

2013 crane carrier front loader

theres a reason why malibus rule the world


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 Post subject: Re: Bump steer help
 Post Posted: Sat Oct 01, 2016 9:09 pm 
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MalibuRacing Junkie
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Location: North Jersey
UMI Sales wrote:
Bump Steer can get complicated when you get into specifics and measuring.

In a "nutshell" you want your tie rods as parallel to the ground as you can get them. Bump Steer is improper length or angle of your suspension and steering linkages due mostly in part from changing the ride height or tire size.

Craig



Isn't it more important to have the tie rods as parallel as possible to the centerline of the lower A arm pivot & ball joint?

Tommy

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"The older I get, the faster I was"


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 Post subject: Re: Bump steer help
 Post Posted: Wed Oct 12, 2016 9:42 am 
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Frequent Racer
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Joined: Tue Nov 08, 2005 8:39 am
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Location: Orlando, FL
LS6 Tommy wrote:
UMI Sales wrote:
Bump Steer can get complicated when you get into specifics and measuring.

In a "nutshell" you want your tie rods as parallel to the ground as you can get them. Bump Steer is improper length or angle of your suspension and steering linkages due mostly in part from changing the ride height or tire size.

Craig



Isn't it more important to have the tie rods as parallel as possible to the centerline of the lower A arm pivot & ball joint?

Tommy


Yes Tommy, it is. The misinformation just flows through these forums like floodwater.

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 Post subject: Re: Bump steer help
 Post Posted: Fri Oct 14, 2016 8:58 am 
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MalibuRacing Authorized Advertiser
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Joined: Tue Jan 06, 2009 10:43 am
Posts: 253
Oops, sorry. It's easier to explain with a diagram.

http://www.longacreracing.com/technical ... o%20Basics

Really the only way to know if you have zero bump is to use a gauge. Or if you have more time and skill than $ (which is most of us), you can take the front springs out and measure toe at various ride heights.

Then, you can use a bump steer kit to change the angle of the tie rod to minimize bump steer (aka toe change during travel).

This can help a drag car go faster because it's not going pigeon toed as it's going down the track.

Hope that helps.

Craig

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UMI Performance, Inc.
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