Starting my front end and have come up totally stumped on how to measure castor quickly and easily. Normally I drop a rod through the king-pin holes and attach an angle finder, but with swivel balls that isn't going to work.

What is the relationship between pinion angle and castor? I know it won't change independently, what I'm wondering is if the pinion is set dead level, how much castor would I then have?


Lastly, who are you guys sending your swivel balls to for castor changes? I know RTE does it, but any more reliable places?


Completely unrelated note, anybody have a good sprung-weight number for a D1? Stock weight should be closer than with an average winch bumper. Need to order my springs soon, just looking for a good baseline spring-rate for my 2.5" coil-overs.

I thought I'd responded to this.

Caster angle-put your angle finder on top of the swivel pin, it's perpendicular (perpencockular?) to the swivel axis.

Once you've got this, you can measure the angle between this and the pinion and tell us all, or you can wait for me to do it for you as I have an axle on jack stands accessible (for the time being, I haven't piled anything in front of it yet).

I think both Keith and Pendy were drilling swivel balls.

My Disco weighed about 5400 pounds stock.

Re spring rates a mate of mine and fellow mod on www.lr4x4.com in the UK has built a superb spring calculator, the linky is here :

Hope it help, did it for me :)


http://www.lr90.shacknet.nu/lr90/calculator.aspx
I mention 'LR4x4' ... as if you have issues using it
either contact him who built it (LR90) or Moi (Hybrid_From_Hell)

Nige

[QUOTE=PTSchram;10353161]I thought I'd responded to this.

Caster angle-put your angle finder on top of the swivel pin, it's perpendicular (perpencockular?) to the swivel axis.
[QUOTE]

Perfect thanks.

That calculator is pretty damn close to what I measured on my truck. Handy too because now I am going to try a set of NRC4304 rear springs which should work according to it.