Adjustable Camber Arms vs. Whiteline Camber Bushings

[wootwoot]

Originally Posted by digital_assassin

I'm no suspension guru but that is where I believe they said they went. I'll crawl under the car tomorrow and look. Will take pictures. They work though because I started with -3 and -2.8 camber and now have -1.9 in the rear on both sides.

Pics please. Never heard of or thought about this......

[digital_assassin]

I haven't been able to get under there yet. I will try tonight. After I thought about it I see where it wouldn't make any sense unless it was used at the subframe or upright. If you had it at the strut connection in the rear it would only change the angle of strut but not affect the camber at all. I'll get pictures.

[Bristecom]

Originally Posted by jamal

It was probably more just what they came up with to meet packaging and design requirements. The whole rear suspension is really low profile compared to the older Subaru rear strut setu[ so the rear floor is a lot flatter and wider. The old strut towers used to be up right behind the back seat at shoulder level (really long struts are good for rally), and now they are at floor level.

You could consider the rear suspension similar to an unequal length double a-arm because there is one upper a-arm and then a longer lca. Then in addition to the toe link there is a trailing link. I haven't really thought about it but I suppose this was for anti-squat or something. Here are some pretty good articles about the rear suspension:
http://www.iwsti.com/forums/gr-suspe...-i-travel.html
http://www.iwsti.com/forums/gr-suspe...bumpsteer.html

You definitely want camber gain with compression to compensate for body roll and tire flex in a corner. Like I said, the rear does a much better job than the front. The front suspension will only gain about half a degree from stock ride height and then go back to where it was at full bump. Essentially this means that for every degree of roll you need a degree of camber to keep the front tires happy and optimize grip, except that you need to be able to brake and want the tires to wear evenly. A stock car probably rolls around 5-6 degrees under max cornering.

So for a McPherson to work well you basically need a lot of caster and camber and a big swaybar.

So what I took from that article is that 0 rear toe would be good in these cars since it always goes inward?

[digital_assassin]

Forgot to get back in here and post what I saw. Rear camber bolts were installed at the control arm to the subframe connection point. So essentially the same adjustment location of the aftermarket control arms just not as much adjustment.

[JoeBoxer]

I wish i had seen this, i would have got rear camber bolts instead of the SPC control arms. The SPC are about $280 but have a very nice setup for adjusting camber. I am surprised camber bolts work in the rear honestly looking forward to more info.

[gmookher]

pics!!!!!

[ATL BRZ]

Shameless plug:

I'm selling my Whiteline KCA326 Rear Camber Adjustment Bushing Kit, Brand new, never installed.

$100 + shipping, US only

[celica73]

Originally Posted by digital_assassin

I've got the 12mm H&R camber bolts in the rear. It goes at the strut to control arm connection. You have to grind off a few threads but they work.

You might have a camber bolt in the rear, but it certainly isn't attached where you are describing.

The BRZ doesn't use a rear strut, and the attachment points of the rear shock do not have anything to do with the camber or toe settings on the car. Control arm to chassis or control arm to hub are the places to adjust the rear alignment.

[JoeBoxer]

Originally Posted by celica73

You might have a camber bolt in the rear, but it certainly isn't attached where you are describing.

The BRZ doesn't use a rear strut, and the attachment points of the rear shock do not have anything to do with the camber or toe settings on the car. Control arm to chassis or control arm to hub are the places to adjust the rear alignment.

I think he has them where the lower control arm mounts to the subframe.

[digital_assassin]

Originally Posted by JoeBoxer

I think he has them where the lower control arm mounts to the subframe.

You are correct sir.

Originally Posted by celica73

You might have a camber bolt in the rear, but it certainly isn't attached where you are describing.

The BRZ doesn't use a rear strut, and the attachment points of the rear shock do not have anything to do with the camber or toe settings on the car. Control arm to chassis or control arm to hub are the places to adjust the rear alignment.

I corrected myself here.

Originally Posted by digital_assassin

I haven't been able to get under there yet. I will try tonight. After I thought about it I see where it wouldn't make any sense unless it was used at the subframe or upright. If you had it at the strut connection in the rear it would only change the angle of strut but not affect the camber at all. I'll get pictures.

And confirmed it here.

Originally Posted by digital_assassin

Forgot to get back in here and post what I saw. Rear camber bolts were installed at the control arm to the subframe connection point. So essentially the same adjustment location of the aftermarket control arms just not as much adjustment.

Sorry for calling it a strut...

[Biddys]

Portland speed industries is currently making suspension solutions for the frs and brz

[gvan1998]

any updates on this??

[DriftEightSix]

Does anyone make upper control arms?

[Captain Snooze]

...

Originally Posted by DriftEightSix

Does anyone make upper control arms?

Originally Posted by racerx1715

We have the rear upper control arms tacked together, and will be fitting them in the next few days. Very happy with the results, as usually for all of our suspension parts full 4130 chromoly. Adjustability at the hub, and bracing added to increase the structural integrity. This part allowed us a nice weight savings of 4 lbs per arm!! This is of course due to the OEM part being made from cast.

We will be offering all of our suspension parts with a urethane bushing option for those that are interested.

Pics: