FR-S / BRZ no trunk liner?

[old greg]

Originally Posted by Calum

What I find really funny is that things like the band aid fix for the rack and pinion that's too short (as mentioned in the moto iq write up) didn't get a single post, let alone a thread. That rack length is going to cause bump steer issues if anyone replaces the front control arm bushings with either urethane or bearings. The band aid fix was to use bushings that will deflect to offset the bump steer.

That's not a band-aid fix and it won't do anything to correct for bumpsteer. I suggest you re-read the article.

[Sasquachulator]

Originally Posted by Calum

Double facepalm; one for the fact that this thread was created, the other for the fact that it made it past two posts.

What I find really funny is that things like the band aid fix for the rack and pinion that's too short (as mentioned in the moto iq write up) didn't get a single post, let alone a thread. That rack length is going to cause bump steer issues if anyone replaces the front control arm bushings with either urethane or bearings. The band aid fix was to use bushings that will deflect to offset the bump steer.

But two square feet of carpet in a place that most people would never notice it and will make absolutely zero difference to the driving experience or the safety of the car is enough to warrant four pages of bickering.

Sad guys.

Thats because this thread is a crucial dealbreaker thread, while that one you mentioned is just....meh, nothing important.

[Calum]

Originally Posted by old greg

That's not a band-aid fix and it won't do anything to correct for bumpsteer. I suggest you re-read the article.

Originally Posted by MotoIQ article

The tie rod inner pivot is inboard of the lower control arm pivot and at a flatter angle, this will cause toe in under suspension compression. the front of the lower control arm has this rubber bushing with a cutout....Perhaps this subtlety counters the toe in under roll that the tie rod location produces.

I have no association with Moto IQ and I have no idea how accurate they are. But this is what piqued my attention and I was surprised was never mentioned on here. It's on the second page of the article, near the top if you want to confirm the context.

I was surprised that more people weren't speculating about the effects this may or may not have. Personally, I've never driven a car that had the inner tie rod pivot in the ideal location to prevent toe change, I doubt I'll care much. I was just trying to make the point that there's bigger things to worry about in life and in this car, than the trunk lid liner.

[old greg]

Fair enough. But while roll-steer and bump-steer are related, they are not the same thing.

[Calum]

Originally Posted by old greg

Fair enough. But while roll-steer and bump-steer are related, they are not the same thing.

While this is getting off topic, at this point I don't think it matters.

Wouldn't the same toe changes cause steering angle changes, and thus bump steer, when the car goes over a bump. Or have I misunderstood the terminology?

Honest question, by the way. I know things can come across differently in text.

[Khyron686]

If you actually post in another thread that ISN'T called "no trunk liner" you might actually get answers from some pretty smart suspension people.

As for this thread... I had Arby's for lunch and it was delicious.

[Spaceywilly]

Arby's is delicious. I really wish they would build more around here. I think bump steer refers to changes in vehicle attitude caused by the bump stops. I thought the motoiq article did a pretty thorough job of explaining the suspension geometry issue so there wasn't much more to discuss about it. And I'm not seeing what it has to do with the rack and pinion?