Gaining toe out as you lower your car makes sense. If you keep lowering it eventually you may get toe in.

I could not find a rear toe curve plot, so I threw this together to help illustrate. The effect of this is similar for AP2s but the ride height will be different because they off set the control arm attachment point where it attaches to the hub.

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The figure below attempts to illustrate the effect of rear control arm articulation on rear toe. The inner end of the control arm is attached to a fixed pivot point on the sub-frame. The outer end is attached to the front of the rear hub. As the control arm swings the hub end moves in an arc. The effect of the arc on the toe is all relative to the starting position. The static stock ride height places the control arm below horizontal. As the suspension compresses it pushes the front of the hub out (toe out). As the suspension rebounds it causes toe in. If the control arm goes above horizontal then toe in will occur.

If the car is lowered and the static ride height places the control link above horizontal the compression will cause toe in and rebound will cause toe out. The overall affect is opposite of what happens at the stock ride height.



Here's a photo of the rear control arm with the ride height set to 12.5" from hub center to metal fender edge. As you can see it's above horizontal. Any compression of the suspension from this point (like when loaded in a turn) will cause toe in to occur. Provided your driving is smooth (i.e. don't have sudden throttle lift mid corner) then the toe in (rather then toe out) makes the back end more stable. This setup up also slows down the initial corner turn in which also helps reduce the chance of over steer.



To achieve such a low ride height (12.5") you will need really short rear shock bodies and appropriate spring rates! At this point my suspension dances around the end of a shortened bump stop under most conditions (no nasty bumps).

EDIT
One more thought regarding the static toe setting... you can start with less static toe, but beware that under braking this could cause toe out resulting in an unstable (squirrely) back end.

 

Thanks for posting that! Can't wait to look under my car now...

 

if your lower then 12.5 does it still toe in or is it just at this 12.5 mark? I'm refering to 12.25.

 

if I read the chart correctly you would still get toe in on compression

 

good deal!

I got my other camber joint on and the car is getting aligned tomarrow. It should be ready for some non-cone hitting runs this weekend.

 

Here's my fast run from our last event at the National site. Some of you may recognize some of the course elements, as it was a combination of last year's national courses.

http://www.youtube.com/watch?v=i7ktvTgpcik

 

So I was able to finally finish editing the video from the El Toro ProSolo and have posted my recap of the event here:

2011 El Toro ProSolo recap/analysis

I have a couple videos on there as well. If the read is interesting al all, lemme know and I'll make similar posts on the bigger events.

 

The course was very tight, all transition and speed maintenance, no room for power, and cone intensive. Darrin's tiny car was probably perfect for the course and he also drove well. He and I both coned away another .4s, which was the story for the event. Also note he is one of only a select few drivers in STR that got any dry 3rd session runs.

 

Sorry to say Mike, but your "invention" is 9 years too late hahaha. I've seen people doing the extra intake port just like yours since 2002. This has been on my to-do list since early 2010. Here is a thread that dates back to 2008. This member has done most of the things I will be doing to my intake. He has the extra intake port like yours, but also has an air guide that blocks heat from the radiator and has insulted the OUTSIDE of his gutted intake box.

DIY intake mods

 

Find me some pictures from 2007! I never said how long I've had it like that...

Although, this doesn't suprise me... There was this time that I "went back in time" and "altered the course of history"... etc.