Caster Correction Question

[Pin_Head]

We never saw any serious rust in CA. When I lived in Shrewsbury, MA for 3 years, I saw what rust was all about. I haven't worked as a professional mechanic for 30 years now.

 

[86tuning]

I worked as an front end alignment mechanic for 3 years with a Hunter Laser aligner machine and it read the caster angle right off the machine. We measured the caster angle. I never heard of a caster "sweep" until I started reading this forum. Sweeping was what the grease monkeys did to the shop floor at closing time.

Nice. Up here in The Great White North (tm) we have special names for everything. Not sure why I call it that, I'm gonna blame the old school master techs that I learned it from.

I was taught that the machine calculates the caster, but measures camber and toe. In any case, to find caster you'll want to put it on an alignment rack and ask for a print out.

 

[LandCruiserPhil]

Shoot for 4° because there is a very noticeable difference at 2° verses 4° on lifted 80 with tires

 

[BamaPaul]

Can you not find the caster (or a close guess)with an angle finder?

Sent from my iPhone using magic

 

[Pin_Head]

Up here in The Great White North (tm) we have special names for everything.

You guys call the dollar a Loonie.

Can you not find the caster (or a close guess)with an angle finder?

Yes, but it is not that accurate. Maybe +/- 1 degree or more.

 

[Douglas S]

You guys call the dollar a Loonie.

It has a loon on it. A Toonie is a whole other matter.

 

[thedoughboy]

Slotting the front by 14 mm will give 4.3 degrees of caster correction, which should be perfect for a 2.5 degree lift. Similarly, the CC bushings are offset by approximately 7 mm, so each bush is approximately 2.15 degrees and two of them should give a total of 4.3 degrees when installed correctly.

You can calculate the angle easily. Divide the distance the front bolt moves by the distance between the front and rear bolts (~185mm). Then using the trig functions on a calculator, take the inverse sine of the result to get the angle.

example: 14/185 = .0756
invsine(.0765) = 4.34 degrees.

That's EPIC!