Steering feel gets lighter as speed increases
I *think* I have an idea what the issue is, but looking to hear other opinions.
First off suspension mods
Mach 1 springs (ride height is pretty close to stock, maybe a tiny bit lower)
Tokico Blues (30K miles on them, but I also installed them 15 years ago)
03-04 Cobra steering rack, MM shaft, all new tie rods
Brand new M-3075-A control arms
Stock Caster/camber plates.
OEM sway bars
MM LCA's. NEW OEM uppers, new axle bushing, new quads. No issues with the torque boxes. 255/45/17 out back
Over the winter I did the Cobra steering rack install, with the new tie rods and MM shaft. All bushings/balljoints/control arms have less than 1K miles on them. There is no play in the steering. A tiny bit of movement of the steering wheel does translate down to the front wheels.
I purchased a caster/camber level, and some toe plates, and did a self alignment. I am not running a bumpsteer kit, and have stock C/C plates. I set it to -0.5* camber, and set the toe to 0. Initially I wanted to confirm the car did not pull to either side first at speed before adding some toe-in. I haven't been back to readjust the toe yet. Did not adjust caster because there is no adjustment on stock plates.
The car drives great from 25-45MPH. Steering is appropriately heavy and had a great feel to it. Problem is when I go faster. At speeds of 60-80MPH, the steering feels very light, and I get a lot of feedback from the road and it tends to follow every little groove or rut. On new pavement, the car tracks perfectly straight, but the steering is feather light.
My thought it I need to add some toe in. It's zero toe now, so at higher speeds, the rubber bushings deflect and I get a slight toe out condition, which causes the steering to feel a bit light. Anyone else's opinions?
I am planning on some MM C/C plates, and new shocks/struts soon.
Most of my driving is backroads up to 45MPH, so I haven't been too concerned and why I haven't dragged out the toe plates again. However last night I went out on the highway for 10 mins, and decided I need to adjust something here.
--1988 Mustang LX 5.0--