Dangerous And Scary !

[blue]

No self centering is very poor !!

Can I measure caster by simply measuring hub angle like I would with a king pin

EG measure this angle /

[speedtripledan]

My 2b was awful for centering until I fitted the updated wishbones with more castor built in

[Peter Bell]

Sounds like it may be your problem, try something like this to measure it, both sides too as they will probably be different.

measure castor1.pdf

[Guest mower man]

Bottom ball joint needs to be slightly behind top one , if you have tie bars shorten the adjust ment eaqaly each side by a couple of turns and road test steering should not be overly light but not need garth arms to steer or try to throw you out of the car mine is a litlle heavy at parking speed but pleasant at above 4/5 mph mower man

[Jez Morton]

Don't you mean slightly in front, referencing the front of the car as the forward direction.

[Guest mower man]

Don't you mean slightly in front, referencing the front of the car as the forward direction.

Whoops !! you are right and I stand corrected so he needs to lengenth the tie bars a bit and road test mower man

[Jez Morton]

I've found measuring the castor at the hub difficult due to having little to measure off. A technique I found in a chassis design book is to measure the camber at full lock left and right and the difference should approximate caster angle. You should get measurements like -86 & +92 = 6 deg caster.

[blue]

Hi what ride heights are you guys running eg. 6 inch bottom of chassis to floor on front and 9 rear etc

At the moment my lower front arms are paralleled ??

[tractor]

6 inch would be great would be able to go over speed humps

[Guest mower man]

Off road ? or std sump.With a short sump I run at 4in under sump and 5 ish under diff and find it ok [ little bit of care need with monster speed bumps ] mower man

[blue]

Ok after having a look at the car (sierra hubs) the top and bottom ball joints are directly above one another

So I take it one of the first things to do is unwind the tie rods to push the bottom ball joint forward about an inch and see if that makes a difference !!

 

[Guest Tim Norman]

That will make a huge difference!

From memory mine is 3/4" in front of the top ball joint

[Guest mower man]

You wont need to move it an inch two turns will make world of difference [ an inch would be 10 degrees or more ] take your time and adjust in small amounts and record all adjustment for reference ,the ideal angle is arount 5/6 degrees mowerman

[Bob Tucker]

Be careful.....it depends how far apart the wishbones are too.

The closer they are the smaller the distance needed to make a difference.

[blue]

Sorry how do you mean how far apart wishbones are ??