What good does swapping right rear upper control arms for left rear upper control arms do for caster?

Someone told me that they did this to there Civic to improve their rear caster settings and I just wanted to ask for more information regarding this modification.

Have any of you guys done it to your car?
How was it in terms of improving the total feel of the car at the track?
How much more/less caster does this give your car?
Where your track times improved?

Any info would be greatly appreciated.
TIA


[Modified by ESCALVANTE, 8:03 PM 3/12/2002]

 

it's the front uppers that people swap, not the rears. it gives approx. 2 degrees positive caster. increasing caster makes steering a bit harder but it improves high speed stability, turn-in, and provides quicker self centering of the steering wheel when coming out of a corner.. it's a worthwhile free mod.. get the z10's and you can dial in the caster perfect after this mod..

 

What is a Z10, and are you doing this on a civic? Thanks

 

yup, done on a civic..

z10 adjustable radius arms are what i was referring to. check em out here, www.z10eng.com, or do a search for z10 and you'll find tons of info. i've never used the arms myself but all i've heard is good things about them!!

 

I dont think you would ever want positive caster on the track, much less the street. But that is just me.

 

hmm.. must just be you!