Uneven LCAs help
Mine did that with NEW MP T-bars and new polyurethane bushings. I bought new T-bars, no change. I'd run it with an open manifold blowing on it and I thought maybe the heat had de-tempered the metal. Nope. New bars changed nothing.
Personally, it seems like you'd have to work to clock T-bars wrong. Rick did say that the points on the bars can wear down as they break in, and that can affect it (mine didn't do it immediately, only after 1k miles), and you should always check K-frame pivots and T-bar anchors in the crossmember.
I emailed Rick Ehrenberg about it when I read the article title "Prime Steer", in the Dec. '11 issue. He said some just do that. "Level it out and drive the piss out of it" , more or less.
My question:
Hi Rick,I was leafing through the December '11 issue. I noticed that on page 64, in your
article "Prime Steer", that whatever project car you had on the rack (you
were illustrating the ground clearance) has one torsion bar adjusting bolt
in way more than the other (One's just barely visible, the other is way out)
Was this picture taken in the middle of adjustments, or is the car driven
that way? I ask because my car has begun sagging on the left front and my
new (500 miles) .890 bars are set with the adjusters out level. I thought it
would change the rate to adjust one more than the other?
His reply, word for word:
The bars in that car are 1990's dated MP bars. The amount of pre-twist in
the bars was, apparently, not as carefully controlled as it was during
production's (OEM, 1960s-'70s) heyday.
It isn't, however, really a problem. As long as you get the ride height in
specs, and equal side-to-side (with weight simulating a driver in the seat),
you're good to go. Rate does NOT change.
Sagging is generally the result of the "points" on the bar's hex getting
somewhat "mushed down". This phenomena slows quickly, reaching an
equilibrium point. There are also many other places where side to side
variations can occur...that's why they are adjustable!
FYI: Cars with OEM HD suspension had shorter adjusting bolts!
Rick