A little help please

[marolf101x]

Toe in, or toe out. . .you did not say.
Toe out will make it "wander" more.

What size tires?
What brand.
Wider front tires tend to "grab" any rut in the road and follow it.
Different brands cause different issues.

What we really need to know is exaclty when this happens.
If it happens when the car is travelling straight with little to no suspension movement. . .it's likely tires and/or alignment.

If it happens when the car is travelling straight just after hitting a bump. . .it's bumpsteer.

However, there are so many possible root causes it's difficult to say without looking at the vehicle. It could be a steering component, a ball joint, something in the rear end suspension that allows it to move ever so slightly and create rear-steer.

[175rgr]

Thanks for the help thus far!

Tires are:

245/45-18 NT555


It only does it when traveling straight down the road and it doesn't take much of a "bump" could just be a slight change in the road surface from one lane to another to make it move.

If you are familiar with some intersections that have the white "rumble" bars that you drive over to alert you to the traffic intersection, those will take the front of the car and push it left and right as you drive over them.

The qa1 springs are mounted correctly in the upper spring perch.

I'm going back through one final time to torque everything again after that im out of ideas.

[marolf101x]

Generally speaking. . .

if it wanders when going straight, no suspension movement. . .it's alignment, tires, or both

if it wanders when the suspension moves. . .it's a geometry issue.

Bumpsteer is easy to check.
-lift the car off the ground
-remove the shock and spring
-place the suspension back at ride height
-using a toe plate, or anything flat against the rotor, compress the suspension and use a tape measure to measure from the front of one rotor to the fron of the other, then the rear of one to the rear of the other.
-write down both front and rear measurements; subract the two
-ride height is your "Zero" number, deviation from that number is your bumpsteer
It's pretty crude, but it's nearly free and only takes an hour or so.

what rear suspension is under this thing?
have you had it on a 4 wheel alignment rack (with a good alignment guy) to make sure the rear is installed square and true?

[Ben@SpeedTech]

Feel free to call us any time M-F 8:00-5:00 mountain time at 435-628-4300. We're happy to listen and help you work out issues, sometimes harder to do by typing back and forth. We can go over the advantages of the AFX spindle and help determine if it meets your needs as well as discuss possible suspension packages without sales pressure, we're here to help.

[175rgr]

Sorry I haven't been replying very quick things are getting pretty busy at work.


It only wanders under suspension movement.

It has been on a good alignment rack with a good alignment guy, but i did not have him check the rear to make sure it was trued up and all was good.

The rear has hotckis drop springs with koni shocks, nothing special.

If I get a chance in the next few days I'll give you guys at speedtech a call.

I've added a few photos below of where everything sits while it is on the ground, and a shot of the current ride height. If it helps.

Current Ride Height


Passenger Front

Driver Front

Driver Rear

Passenger Rear

[dhutton]

I don't know if it's an optical illusion but that oil pan looks very low in the third pic.

Don

[n77nxc]

It's an illusion. It's the Holley pan.

[Ben@SpeedTech]

Sounds good, when you call ask for Blake or Jay, they've got the most suspension tuning and working out bugs experience.