What is bump steer?

A lot of people don’t understand bump steer, or really address bump steer in their drag car build, but it is actually pretty important. Bump steer is when the car is on the starting line and it’s at ride height then when you let go of the button or the clutch and you dump it the front end comes up and your wheels toe in or out as the strut extends.  So say the car took off and your wheels toed in, well, when they land they have to straighten back out, and it’s going to scrub off a lot of elapsed time and that’s no good. We want to be as smooth as we can from point A to point B. 

Watch Our Bump Steer Video

Why does bump steer matter?

Strut manufacturers give you a number for the amount of travel your strut will go through. Your strut will actually rotate as it moves through that travel distance. So let’s say it starts straight with no toe in, as they drop they will actually turn in creating toe in.  When the wheels hit back down on the race track they have to straighten back out and this creates a drag and a resulting loss in elapsed time.

 

Correcting your bump steer

You have a few components to deal with to get your bump steer correct.  Your tie rod, lower control arm, which is your camber bar, and your forward control arm, which is your caster bar. Your lower control arm (camber) bar is going to be the most important bar for your bump steer. 

You will want your tie rod parallel to your lower control arm.  The way we do it is to take a digital level and find the angle of the lower control arm and then get the angle of the tie rod.  Then you can shim the tie rod down to match the lower control arms angle.  We don’t recommend shimming the tie rod higher than the steering arm since that is not a correct installation.  You may have to mount your lower control arm differently to match the tie rod if that is the case.

 

Matching the angle of the tie rod to the lower control arm is key to keeping bump steer correct and your drag car moving properly.

Got a question? We can answer.

6 + 15 =

 

Correcting your bump steer

You have a few components to deal with to get your bump steer correct.  Your tie rod, lower control arm, which is your camber bar, and your forward control arm, which is your caster bar. Your lower control arm (camber) bar is going to be the most important bar for your bump steer. 

You will want your tie rod parallel to your lower control arm.  The way we do it is to take a digital level and find the angle of the lower control arm and then get the angle of the tie rod.  Then you can shim the tie rod down to match the lower control arms angle.  We don’t recommend shimming the tie rod higher than the steering arm since that is not a correct installation.  You may have to mount your lower control arm differently to match the tie rod if that is the case.

 

Matching the angle of the tie rod to the lower control arm is key to keeping bump steer correct and your drag car moving properly.

  • Strange Door Car Steering Rack 22-1 Ratio – 19 1/2″ Tie Rod Centers

    $ 595.00
  • Strange Lower Control Arm Tube Kit

    Strange Lower Control Arm Tube Kit For Strange Aluminum Struts – 1/2″ ID Rod Ends

    $ 160.00
  • Titanium Lower Control Arm Kit

    $ 1,259.99
  • Control Arm Bracket

    $ 5.87
  • Steering Rack Mount Kit

    $ 74.99
  • Strange Door car steering rack

    Strange Door Car Steering Rack 22-1 Ratio – 24-1/2″ Tie Rod Centers

    $ 590.00
  • Tie Rod Kit

    $ 164.99
  • Lower Control Arm Kit

    $ 399.99

Winters racing poster giveaway!

Win this poster signed by Sam "The Bandit"

Winner will be drawn in January

You have been entered. Good Luck!