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Description of ITR rear passive steering

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Old Sep 14, 2010 | 09:00 AM
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Default Description of ITR rear passive steering

I guess this is more directed towards guys who road race or autocross, but looking forward to hearing from everyone. The ITR rear LCAs have the same design as the 88 CRX si which allows for more flex under load and creates a passive rear steering effect. Does this feel noteably different than the standard integra/civic rear LCAs? Is the effect magnified by worn bushings to the point of being dangerous?

Thanks
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Old Sep 14, 2010 | 11:57 AM
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Default Re: Description of ITR rear passive steering

How does the itr lca's have more flex under load?
The whole design looks stronger, and beefier (for a lack of a better technical term)...

While bigger doesn't mean better, it looks like it would stand up against torsional loads much better since is considerably wider.

OT:My rear suspension is clicking and Im looking to replace the bushings as a side note. What are the options besides getting function7 lca's?...not to jack the OP's thread...
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Old Sep 14, 2010 | 01:47 PM
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Default Re: Description of ITR rear passive steering

There is nothing special about the 88 CRX / ITR control arm other than the fact that it's lighter and probably a bit more expensive to produce than the cast equivalent. "Passive rear steering" just describes the suspension design on ALL 88-00 civics and 90-01 integras wherein the rear toe changes with the suspension travel. This myth that the stamped control arm somehow produces magical "passive rear steering" is old and won't die, apparently.
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Old Sep 15, 2010 | 07:41 AM
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Default Re: Description of ITR rear passive steering

Originally Posted by steronz
There is nothing special about the 88 CRX / ITR control arm other than the fact that it's lighter and probably a bit more expensive to produce than the cast equivalent. "Passive rear steering" just describes the suspension design on ALL 88-00 civics and 90-01 integras wherein the rear toe changes with the suspension travel. This myth that the stamped control arm somehow produces magical "passive rear steering" is old and won't die, apparently.
The myth, actually, is a result of a change in the suspension pickup points. The 88 Civic/CRX had the frontmost pickup point (where the front toe link of the rear trailing arm connected to the chassis) mounted about an inch lower (if I remember our R&D data from years ago correctly) than the subsequent years (89 and later).

This higher mounting point affected the toe more during the entire suspension travel, leading to the rumors of increased passive steering in the 88 models.

-A

Last edited by Function7; Sep 16, 2010 at 02:51 PM.
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Old Sep 15, 2010 | 08:43 AM
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Default Re: Description of ITR rear passive steering

Originally Posted by Function7
This higher mounting point affected the toe more during the entire suspension travel, leading to the rumors of increased passive steering in the 88 models.

-A
With that said, does that means the rumors are not truth?
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Old Sep 15, 2010 | 12:28 PM
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Default Re: Description of ITR rear passive steering

evidently the rear LCAs on the 88 crx and ITR are no different than all other civics and tegs except for weight and strut mounting point. I'm not sure i buy that but that's what everyone is saying.

I did have a 88 crx si and the ITR seems to drive in a simular way with a little twitch mid corner on long sweeping corners. Perhaps my crx and ITR have worn bushings in common. I'm in the process of trying to get a good alignment on the ITR but i'll have to take a closer look at the bushings.
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Old Sep 15, 2010 | 05:04 PM
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Default Re: Description of ITR rear passive steering

Originally Posted by Function7
The myth, actually, is a result of a change in the suspension pickup points.
Ahh, you're right. The first post on this page is probably the best we're gonna get on the topic. I'm not sure I buy the whole story, hell I'm not sure I can even see a difference in the pics.
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Old Sep 15, 2010 | 08:41 PM
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Default Re: Description of ITR rear passive steering

rear lca made no difference and i run both itr and dc. bs garbage talk. prove me wrong if you disagree.
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Old Sep 15, 2010 | 09:34 PM
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Default Re: Description of ITR rear passive steering

Didn't Mazda advertise something similar with their twin trapezoidal link rear suspension?
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Old Sep 17, 2010 | 05:29 PM
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Default Re: Description of ITR rear passive steering

Originally Posted by CW-ITR
With that said, does that means the rumors are not truth?
Truth (or reality) is very different from the rumors floating out there.

Cheers!

-A
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