I have a question about my front suspension. Built an A-Ford Speedster (which is allowed on the road but is actually used most on the beach) with fairly standard parts. What I changed is a 1" dropped front crossmember and removed some leaf springs. As a result, it has dropped quite a bit with still reasonable suspension. But because I still mounted the original wishbone in its original location, I have too much caster! Now I want to split the original wishbone so I can move the mounting points up and reduce the caster. What is the "ideal" caster? Around 7 degrees? Or is there a difference for different usage? I use the original steering. Do I need a Panhard bar? Thanks, Bart
How much caster do you have now? You can Pie cut the wishbones to adjust Caster. I like 5 degrees positive Caster.
Each stet up different , More caster for higher speeds ,steering heavy. Did you check @ ride height on ground. if you know thats The caster you want you can cut bones to cast you want & use slip tube inside plug weld & weld back up smooth out. Panbar optional when setting up pan bar same thing set / adjust @ ride height
Is it the numbers that bother you, or how the car handles? Stock steering box location no panhard needed.
Its not (only) the numbers that bothers me. Straight line is OK but its the steering thats going tough. Thought if I made the caster less positive the straight line would still be ok but the steering would improve.
I had 10 degrees on my coupe and it gave me death wobble. I adjusted it down to seven degrees - as much as my Heim ends would allow - and the death wobble was cured. I think 4 - 5 degrees will be more than adequate. Another car I own, a tub with a buggy spring and cross steering is awaiting a Panhard bar to eliminate erratic steering caused by the swaying spring shackles.
I usually try for 6-7 degrees, but for short wheelbase cars I use 10-11 degrees. My Austin sedan is 89" wheelbase and set at 10 degrees. It wants to go straight at trap speeds over 100 mph and never had any death wobble or handling issues. I do notice when turning sharply on gr***, or loose surface the tires will slide when the wheel is cranked hard to either direction. But the plus is the steeper angle makes it hold straight at high speeds easily.