[JCunningham]

On the SS the Caster is 7.4deg on the 1LE it is 6.9deg. I did the 1le track suspension. everything that comes with the kit including the front radius arms. The 1le kit included upper bearings for the MRC shocks. My alignment shown 7.4 and 7.3. are the shock towers different?
https://my.chevrolet.com/content/dam...tion-guide.pdf

[Alpha1BC]

No difference in the shock towers, that's pretty much what my 1LE was at after the track alignment as well. Only way to change caster is to go with aftermarket parts, such as an adjustable strut top mount. All adjusting caster will do is create less aligning torque (meaning the steering will feel a little lighter) and your camber gain during suspension articulation will be slightly different. You'd also loose some ride comfort going over rough road because the aftermarket top mounts won't have the rubber to isolate those impacts.

IMO, leaving caster as it is would probably be OK unless you're planning to track the car competitively and are an experienced driver. Mine is still plenty capable on the street and track with the factory caster, and it doesn't give any undesirable steering performance or tire wear that I've been able to pick up on.

[Ryephile]

I have mine setup with 7.9° caster with the Moreno plates. The roughly half degree over my stock track alignment is slightly noticeable with stronger aligning torque (more snap to center) and a minor loss of steering feel. The benefit is increased dynamic camber while turning, which is something only needed on the track.

If your car is street-only, there's no need to fuss with the caster unless you're looking for very specific behavior.

[JCunningham]

im wondering why after i put all the 1le parts in that my caster that is unadjustable still the same 7.4 when the 1le is 6.9.

[Ryephile]

Originally Posted by JCunningham

im wondering why after i put all the 1le parts in that my caster that is unadjustable still the same 7.4 when the 1le is 6.9.

It's not. My 1LE started off with low 7's. The GM specs are there just to sanity check the hard parts are within a ballpark.

Like I said, if you're not tracking the car, this really isn't even a topic to worry about.

[Alpha1BC]

Originally Posted by Ryephile

It's not. My 1LE started off with low 7's. The GM specs are there just to sanity check the hard parts are within a ballpark.

Like I said, if you're not tracking the car, this really isn't even a topic to worry about.

+1, I wouldn't worry about it either. My 1LE came from the factory with around 7.4 and is still at 7.4 after the track alignment, still does fine on the track and street.