Increased caster with 20mm subframe spacers?

[JGood]

After my m60 swap, in which I used 20mm subframe spacers, I noticed that the wheels are much further forward in the wheel well. Has anyone else noticed it? Is there an easy fix, like a different CAB? I have the M3 offset CAB's in currently, I'm thinking if I were to install them 'backwords' of the normal position, it would pull the wheel back. I just have no idea what effect this will have on other suspension parts.

[Jean]

All else being equal you have alignment specs before/after?

[JGood]

All else being equal you have alignment specs before/after?

Nah, I have the Longacre toe alignment kit, which I used to set zero toe, and I have IE camber plates with which I set camber as close to the factory position as possible. They don't have caster adjustment. I guess after all the work I did, I probably should get a real alignment done. but both wheels are equally forward in the wheel wells, so I assumed this was just due to the spacers.

[bmwmech1]

Justin, the spacers should have no effect on caster. Think about the 3 pivot points of the wishbone... the spacers only move the middle pivot point away from the body, straight down, neither forward nor backward. The caster issue is from the M3 CABs. You may find that if you flip-flop them you have the same issue, only towards the rear of the wheel well. Just put the non-offset CABs in and you're back to the correct geometry, or leave the offsets in and enjoy more caster than from the factory...

Garey

[JGood]

Justin, the spacers should have no effect on caster. Think about the 3 pivot points of the wishbone... the spacers only move the middle pivot point away from the body, straight down, neither forward nor backward. The caster issue is from the M3 CABs. You may find that if you flip-flop them you have the same issue, only towards the rear of the wheel well. Just put the non-offset CABs in and you're back to the correct geometry, or leave the offsets in and enjoy more caster than from the factory...

Garey

I think you're right. I just found a pic of my car right before I did the rebuild, and the wheels were pushed forward then as well, just not as noticeable since the car wasn't as low. I put those bushings in right before I did the rebuild, and I never really took notice. I'll go back to stock CAB's this winter, the car will never see the track, and I don't want to chew my fender lips up.