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Bumpsteer and Lift
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=3&t=73894		 Page 1 of 1
Author:  DocB [ Fri Jan 25, 2013 1:08 am ]
Post subject:  Bumpsteer and Lift
Question: When you lift a Jeep, does it noticeably effect the bumpsteer?

And if so, what can be done about it?
Author:  JeepMorrison [ Fri Jan 25, 2013 1:13 am ]
Post subject:  Re: Bumpsteer and Lift
Ive never noticed it on my kj, but others might chime in.

Sent from my Home Phone using Tapatalk 2
Author:  tjkj2002 [ Fri Jan 25, 2013 8:27 am ]
Post subject:  Re: Bumpsteer and Lift
Can't get bumpsteer in a IFS vehicle,no track bar and no drag link.
Author:  ChooChooman74 [ Fri Jan 25, 2013 8:51 am ]
Post subject:  Re: Bumpsteer and Lift
tjkj2002 wrote:
Can't get bumpsteer in a IFS vehicle,no track bar and no drag link.

Our race cars have IFS and we had a longacre bump steer gauge so we can check bump steer.

Bump steer gauges
http://www.longacreracing.com/catalog/catlist.asp?catid=5

Instructions on use
http://www.longacreracing.com/instructions/inst.asp?INSTID=15

What bump steer is
http://www.longacreracing.com/articles/art.asp?artid=13


Sent from my Nexus 7 using Tapatalk HD
Author:  tjkj2002 [ Fri Jan 25, 2013 8:53 am ]
Post subject:  Re: Bumpsteer and Lift
ChooChooman74 wrote:
tjkj2002 wrote:
Can't get bumpsteer in a IFS vehicle,no track bar and no drag link.

Our race cars have IFS and we had a longacre bump steer gauge so we can check bump steer.

http://www.longacreracing.com/instructions/inst.asp?INSTID=15



Sent from my Nexus 7 using Tapatalk HD

That is a different type of bumpsteer then what is the normal consideration of bumpsteer most know when they improperly setup a lift on a SFA vehicle.
Author:  tommudd [ Fri Jan 25, 2013 9:30 am ]
Post subject:  Re: Bumpsteer and Lift
tjkj2002 wrote:
ChooChooman74 wrote:
tjkj2002 wrote:
Can't get bumpsteer in a IFS vehicle,no track bar and no drag link.

Our race cars have IFS and we had a longacre bump steer gauge so we can check bump steer.

http://www.longacreracing.com/instructions/inst.asp?INSTID=15




Sent from my Nexus 7 using Tapatalk HD

That is a different type of bumpsteer then what is the normal consideration of bumpsteer most know when they improperly setup a lift on a SFA vehicle.


See I knew someone else thought the same way I did :wink:
Author:  BugginKJ [ Fri Jan 25, 2013 1:16 pm ]
Post subject:  Re: Bumpsteer and Lift
ChooChooman74 wrote:
tjkj2002 wrote:
Can't get bumpsteer in a IFS vehicle,no track bar and no drag link.

Our race cars have IFS and we had a longacre bump steer gauge so we can check bump steer.

Bump steer gauges
http://www.longacreracing.com/catalog/catlist.asp?catid=5

Instructions on use
http://www.longacreracing.com/instructions/inst.asp?INSTID=15

What bump steer is
http://www.longacreracing.com/articles/art.asp?artid=13


Sent from my Nexus 7 using Tapatalk HD

Excellent info for those that need to learn what it is.
Heck my 4wd 4 wheel independent suspension 1/8 scale nitro race buggy has bump steer to over come and have made a special gauge to correct it.
:rockon:
Author:  DocB [ Sat Jan 26, 2013 12:32 am ]
Post subject:  Re: Bumpsteer and Lift
Choochooooman74, nice to post those links for everyone to see.
I also am coming from a race car back ground where bumpsteer is very important when the ride height is changed, and thus the front end geometry changes. I woulde like to make sure my wheels are pointed in the correct direction during turn-in to a right hander at 90 MPH.
I realize this is a Jeep and not a race car.
I don't want to make a Federal case out of this. I am just trying to learn and understand lifts and suspension. Purely Lift Tech. If nothing can be done about it, so be it and now I know.

tjkj, just to clarify, are you saying that with a lift, bumpsteer is not induced OR that it can not be tuned for (without added suspension components like a tierod end with spacers)?

Tom and tjkj-does that mean don't worry about it on the Jeep?
Author:  tjkj2002 [ Sat Jan 26, 2013 12:47 am ]
Post subject:  Re: Bumpsteer and Lift
DocB wrote:
Tom and tjkj-does that mean don't worry about it on the Jeep?

Oh I had to worry about it since I went SFA.I must have the drag link and trackbar be as equal in length and parallel otherwise you get "bumpsteer".


For what you are experiancing is not bumpsteer,it's the SAI angle and scrub angle being out of wack and sadly there is nothing you can do to change it but you can compensate with caster and altering the toe setting a little on a KJ.
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